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average power reduction (PAPR)</title> <meta name="description" content="Search results for: peak to average power reduction (PAPR)"> <meta name="keywords" content="peak to average power reduction (PAPR)"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science 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method="get" action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="peak to average power reduction (PAPR)"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 15675</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: peak to average power reduction (PAPR)</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15675</span> Perfomance of PAPR Reduction in OFDM System for Wireless Communications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alcardo%20Alex%20Barakabitze">Alcardo Alex Barakabitze</a>, <a href="https://publications.waset.org/abstracts/search?q=Saddam%20Aziz"> Saddam Aziz</a>, <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Zubair"> Muhammad Zubair </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The Orthogonal Frequency Division Multiplexing (OFDM) is a special form of multicarrier transmission that splits the total transmission bandwidth into a number of orthogonal and non-overlapping subcarriers and transmit the collection of bits called symbols in parallel using these subcarriers. In this paper, we explore the Peak to Average Power Reduction (PAPR) problem in OFDM systems. We provide the performance analysis of CCDF and BER through MATLAB simulations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bit%20error%20ratio%20%28BER%29" title="bit error ratio (BER)">bit error ratio (BER)</a>, <a href="https://publications.waset.org/abstracts/search?q=OFDM" title=" OFDM"> OFDM</a>, <a href="https://publications.waset.org/abstracts/search?q=peak%20to%20average%20power%20reduction%20%28PAPR%29" title=" peak to average power reduction (PAPR)"> peak to average power reduction (PAPR)</a>, <a href="https://publications.waset.org/abstracts/search?q=sub-carriers" title=" sub-carriers"> sub-carriers</a> </p> <a href="https://publications.waset.org/abstracts/28754/perfomance-of-papr-reduction-in-ofdm-system-for-wireless-communications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28754.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">542</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15674</span> Joint Discrete Hartley Transform-Clipping for Peak to Average Power Ratio Reduction in Orthogonal Frequency Division Multiplexing System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Selcuk%20Comlekci">Selcuk Comlekci</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammed%20Aboajmaa"> Mohammed Aboajmaa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Orthogonal frequency division multiplexing (OFDM) is promising technique for the modern wireless communications systems due to its robustness against multipath environment. The high peak to average power ratio (PAPR) of the transmitted signal is one of the major drawbacks of OFDM system, PAPR degrade the performance of bit error rate (BER) and effect on the linear characteristics of high power amplifier (HPA). In this paper, we proposed DHT-Clipping reduction technique to reduce the high PAPR by the combination between discrete Hartley transform (DHT) and Clipping techniques. From the simulation results, we notified that DHT-Clipping technique offers better PAPR reduction than DHT and Clipping, as well as DHT-Clipping introduce improved BER performance better than clipping. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ISI" title="ISI">ISI</a>, <a href="https://publications.waset.org/abstracts/search?q=cyclic%20prefix" title=" cyclic prefix"> cyclic prefix</a>, <a href="https://publications.waset.org/abstracts/search?q=BER" title=" BER"> BER</a>, <a href="https://publications.waset.org/abstracts/search?q=PAPR" title=" PAPR"> PAPR</a>, <a href="https://publications.waset.org/abstracts/search?q=HPA" title=" HPA"> HPA</a>, <a href="https://publications.waset.org/abstracts/search?q=DHT" title=" DHT"> DHT</a>, <a href="https://publications.waset.org/abstracts/search?q=subcarrier" title=" subcarrier"> subcarrier</a> </p> <a href="https://publications.waset.org/abstracts/50405/joint-discrete-hartley-transform-clipping-for-peak-to-average-power-ratio-reduction-in-orthogonal-frequency-division-multiplexing-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/50405.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">439</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15673</span> Performance Analysis of PAPR Reduction in OFDM Systems based on Partial Transmit Sequence (PTS) Technique</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alcardo%20Alex%20Barakabitze">Alcardo Alex Barakabitze</a>, <a href="https://publications.waset.org/abstracts/search?q=Tan%20Xiaoheng"> Tan Xiaoheng</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Orthogonal Frequency Division Multiplexing (OFDM) is a special case of Multi-Carrier Modulation (MCM) technique which transmits a stream of data over a number of lower data rate subcarriers. OFDM splits the total transmission bandwidth into a number of orthogonal and non-overlapping subcarriers and transmit the collection of bits called symbols in parallel using these subcarriers. This paper explores the Peak to Average Power Reduction (PAPR) using the Partial Transmit Sequence technique. We provide the distribution analysis and the basics of OFDM signals and then show how the PAPR increases as the number of subcarriers increases. We provide the performance analysis of CCDF and PAPR expressed in decibels through MATLAB simulations. The simulation results show that, in PTS technique, the performance of PAPR reduction in OFDM systems improves significantly as the number of sub-blocks increases. However, by keeping the same number of sub-blocks variation, oversampling factor and the number of OFDM blocks’ iteration for generating the CCDF, the OFDM systems with 128 subcarriers have an improved performance in PAPR reduction compared to OFDM systems with 256, 512 or >512 subcarriers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=OFDM" title="OFDM">OFDM</a>, <a href="https://publications.waset.org/abstracts/search?q=peak%20to%20average%20power%20reduction%20%28PAPR%29" title=" peak to average power reduction (PAPR)"> peak to average power reduction (PAPR)</a>, <a href="https://publications.waset.org/abstracts/search?q=bit%20error%20rate%20%28BER%29" title=" bit error rate (BER)"> bit error rate (BER)</a>, <a href="https://publications.waset.org/abstracts/search?q=subcarriers" title=" subcarriers"> subcarriers</a>, <a href="https://publications.waset.org/abstracts/search?q=wireless%20communications" title=" wireless communications"> wireless communications</a> </p> <a href="https://publications.waset.org/abstracts/28576/performance-analysis-of-papr-reduction-in-ofdm-systems-based-on-partial-transmit-sequence-pts-technique" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28576.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">514</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15672</span> PAPR Reduction of FBMC Using Sliding Window Tone Reservation Active Constellation Extension Technique</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Anuradha">S. Anuradha</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Sandeep%20Kumar"> V. Sandeep Kumar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The high Peak to Average Power Ratio (PAR) in Filter Bank Multicarrier with Offset Quadrature Amplitude Modulation (FBMC-OQAM) can significantly reduce power efficiency and performance. In this paper, we address the problem of PAPR reduction for FBMC-OQAM systems using Tone Reservation (TR) technique. Due to the overlapping structure of FBMCOQAM signals, directly applying TR schemes of OFDM systems to FBMC-OQAM systems is not effective. We improve the tone reservation (TR) technique by employing sliding window with Active Constellation Extension for the PAPR reduction of FBMC-OQAM signals, called sliding window tone reservation Active Constellation Extension (SW-TRACE) technique. The proposed SW-TRACE technique uses the peak reduction tones (PRTs) of several consecutive data blocks to cancel the peaks of the FBMC-OQAM signal inside a window, with dynamically extending outer constellation points in active(data-carrying) channels, within margin-preserving constraints, in order to minimize the peak magnitude. Analysis and simulation results compared to the existing Tone Reservation (TR) technique for FBMC/OQAM system. The proposed method SW-TRACE has better PAPR performance and lower computational complexity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=FBMC-OQAM" title="FBMC-OQAM">FBMC-OQAM</a>, <a href="https://publications.waset.org/abstracts/search?q=peak-to-average%20power%20ratio" title=" peak-to-average power ratio"> peak-to-average power ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=sliding%20window" title=" sliding window"> sliding window</a>, <a href="https://publications.waset.org/abstracts/search?q=tone%20reservation%20Active%20Constellation%20Extension" title=" tone reservation Active Constellation Extension"> tone reservation Active Constellation Extension</a> </p> <a href="https://publications.waset.org/abstracts/15771/papr-reduction-of-fbmc-using-sliding-window-tone-reservation-active-constellation-extension-technique" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/15771.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">447</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15671</span> A Novel Multi-Block Selective Mapping Scheme for PAPR Reduction in FBMC/OQAM Systems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Laabidi%20Mounira">Laabidi Mounira</a>, <a href="https://publications.waset.org/abstracts/search?q=Zayani%20Rafk"> Zayani Rafk</a>, <a href="https://publications.waset.org/abstracts/search?q=Bouallegue%20Ridha"> Bouallegue Ridha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Filter Bank Multicarrier with Offset Quadrature Amplitude Modulation (FBMC/OQAM) is presently known as a sustainable alternative to conventional Orthogonal Frequency Division Multiplexing (OFDM) for signal transmission over multi-path fading channels. Like all multicarrier systems, FBMC/OQAM suffers from high Peak to Average Power Ratio (PAPR). Due to the symbol overlap inherent in the FBMC/OQAM system, the direct application of conventional OFDM PAPR reduction scheme is far from being effective. This paper suggests a novel scheme termed Multi-Blocks Selective Mapping (MB-SLM) whose simulation results show that its performance in terms of PAPR reduction is almost identical to that of OFDM system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=FBMC%2FOQAM" title="FBMC/OQAM">FBMC/OQAM</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-blocks" title=" multi-blocks"> multi-blocks</a>, <a href="https://publications.waset.org/abstracts/search?q=OFDM" title=" OFDM"> OFDM</a>, <a href="https://publications.waset.org/abstracts/search?q=PAPR" title=" PAPR"> PAPR</a>, <a href="https://publications.waset.org/abstracts/search?q=SLM" title=" SLM "> SLM </a> </p> <a href="https://publications.waset.org/abstracts/25374/a-novel-multi-block-selective-mapping-scheme-for-papr-reduction-in-fbmcoqam-systems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/25374.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">463</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15670</span> Improved Active Constellation Extension for the PAPR Reduction of FBMC-OQAM Signals</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mounira%20Laabidi">Mounira Laabidi</a>, <a href="https://publications.waset.org/abstracts/search?q=Rafik%20Zayani"> Rafik Zayani</a>, <a href="https://publications.waset.org/abstracts/search?q=Ridha%20Bouallegue"> Ridha Bouallegue</a>, <a href="https://publications.waset.org/abstracts/search?q=Daniel%20Roviras"> Daniel Roviras</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The Filter Bank multicarrier with Offset Quadrature Amplitude Modulation (FBMC-OQAM) has been introduced to overcome the poor spectral characteristics and the waste in both bandwidth and energy caused by the use of the cyclic prefix. However, the FBMC-OQAM signals suffer from the high Peak to Average Power Ratio (PAPR) problem. Due to the overlapping structure of the FBMC-OQAM signals, directly applying the PAPR reduction schemes conceived for the OFDM one turns out to be ineffective. In this paper, we address the problem of PAPR reduction for FBMC-OQAM systems by suggesting a new scheme based on an improved version of Active Constellation Extension scheme (ACE) of OFDM. The proposed scheme, named Rolling Window ACE, takes into consideration the overlapping naturally emanating from the FBMC-OQAM signals. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ACE" title="ACE">ACE</a>, <a href="https://publications.waset.org/abstracts/search?q=FBMC" title=" FBMC"> FBMC</a>, <a href="https://publications.waset.org/abstracts/search?q=OQAM" title=" OQAM"> OQAM</a>, <a href="https://publications.waset.org/abstracts/search?q=OFDM" title=" OFDM"> OFDM</a>, <a href="https://publications.waset.org/abstracts/search?q=PAPR" title=" PAPR"> PAPR</a>, <a href="https://publications.waset.org/abstracts/search?q=rolling-window" title=" rolling-window"> rolling-window</a> </p> <a href="https://publications.waset.org/abstracts/25720/improved-active-constellation-extension-for-the-papr-reduction-of-fbmc-oqam-signals" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/25720.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">546</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15669</span> Usage of Channel Coding Techniques for Peak-to-Average Power Ratio Reduction in Visible Light Communications Systems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=P.%20L.%20D.%20N.%20M.%20de%20Silva">P. L. D. N. M. de Silva</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20G.%20Edirisinghe"> S. G. Edirisinghe</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Weerasuriya"> R. Weerasuriya</a> </p> <p class="card-text"><strong>Abstract:</strong></p> High peak-to-average power ratio (PAPR) is a concern of orthogonal frequency division multiplexing (OFDM) based visible light communication (VLC) systems. Discrete Fourier Transform spread (DFT-s) OFDM is an alternative single carrier modulation scheme which would address this concern. Employing channel coding techniques is another mechanism to reduce the PAPR. Previous research has been conducted to study the impact of these techniques separately. However, to the best of the knowledge of the authors, no study has been done so far to identify the improvement which can be harnessed by hybridizing these two techniques for VLC systems. Therefore, this is a novel study area under this research. In addition, channel coding techniques such as Polar codes and Turbo codes have been tested in the VLC domain. However, other efficient techniques such as Hamming coding and Convolutional coding have not been studied too. Therefore, the authors present the impact of the hybrid of DFT-s OFDM and Channel coding (Hamming coding and Convolutional coding) on PAPR in VLC systems using Matlab simulations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=convolutional%20coding" title="convolutional coding">convolutional coding</a>, <a href="https://publications.waset.org/abstracts/search?q=discrete%20Fourier%20transform%20spread%20orthogonal%20frequency%20division%20multiplexing" title=" discrete Fourier transform spread orthogonal frequency division multiplexing"> discrete Fourier transform spread orthogonal frequency division multiplexing</a>, <a href="https://publications.waset.org/abstracts/search?q=hamming%20coding" title=" hamming coding"> hamming coding</a>, <a href="https://publications.waset.org/abstracts/search?q=peak-to-average%20power%20ratio" title=" peak-to-average power ratio"> peak-to-average power ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=visible%20light%20communications" title=" visible light communications"> visible light communications</a> </p> <a href="https://publications.waset.org/abstracts/150222/usage-of-channel-coding-techniques-for-peak-to-average-power-ratio-reduction-in-visible-light-communications-systems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/150222.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">154</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15668</span> Impact of Hard Limited Clipping Crest Factor Reduction Technique on Bit Error Rate in OFDM Based Systems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Theodore%20Grosch">Theodore Grosch</a>, <a href="https://publications.waset.org/abstracts/search?q=Felipe%20Koji%20Godinho%20Hoshino"> Felipe Koji Godinho Hoshino</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In wireless communications, 3GPP LTE is one of the solutions to meet the greater transmission data rate demand. One issue inherent to this technology is the PAPR (Peak-to-Average Power Ratio) of OFDM (Orthogonal Frequency Division Multiplexing) modulation. This high PAPR affects the efficiency of power amplifiers. One approach to mitigate this effect is the Crest Factor Reduction (CFR) technique. In this work, we simulate the impact of Hard Limited Clipping Crest Factor Reduction technique on BER (Bit Error Rate) in OFDM based Systems. In general, the results showed that CFR has more effects on higher digital modulation schemes, as expected. More importantly, we show the worst-case degradation due to CFR on QPSK, 16QAM, and 64QAM signals in a linear system. For example, hard clipping of 9 dB results in a 2 dB increase in signal to noise energy at a 1% BER for 64-QAM modulation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bit%20error%20rate" title="bit error rate">bit error rate</a>, <a href="https://publications.waset.org/abstracts/search?q=crest%20factor%20reduction" title=" crest factor reduction"> crest factor reduction</a>, <a href="https://publications.waset.org/abstracts/search?q=OFDM" title=" OFDM"> OFDM</a>, <a href="https://publications.waset.org/abstracts/search?q=physical%20layer%20simulation" title=" physical layer simulation"> physical layer simulation</a> </p> <a href="https://publications.waset.org/abstracts/53288/impact-of-hard-limited-clipping-crest-factor-reduction-technique-on-bit-error-rate-in-ofdm-based-systems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/53288.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">366</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15667</span> A Comparative Analysis of Various Companding Techniques Used to Reduce PAPR in VLC Systems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arushi%20Singh">Arushi Singh</a>, <a href="https://publications.waset.org/abstracts/search?q=Anjana%20Jain"> Anjana Jain</a>, <a href="https://publications.waset.org/abstracts/search?q=Prakash%20Vyavahare"> Prakash Vyavahare</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Recently, Li-Fi(light-fiedelity) has been launched based on VLC(visible light communication) technique, 100 times faster than WiFi. Now 5G mobile communication system is proposed to use VLC-OFDM as the transmission technique. The VLC system focused on visible rays, is considered for efficient spectrum use and easy intensity modulation through LEDs. The reason of high speed in VLC is LED, as they flicker incredibly fast(order of MHz). Another advantage of employing LED is-it acts as low pass filter results no out-of-band emission. The VLC system falls under the category of ‘green technology’ for utilizing LEDs. In present scenario, OFDM is used for high data-rates, interference immunity and high spectral efficiency. Inspite of the advantages OFDM suffers from large PAPR, ICI among carriers and frequency offset errors. Since, the data transmission technique used in VLC system is OFDM, the system suffers the drawbacks of OFDM as well as VLC, the non-linearity dues to non-linear characteristics of LED and PAPR of OFDM due to which the high power amplifier enters in non-linear region. The proposed paper focuses on reduction of PAPR in VLC-OFDM systems. Many techniques are applied to reduce PAPR such as-clipping-introduces distortion in the carrier; selective mapping technique-suffers wastage of bandwidth; partial transmit sequence-very complex due to exponentially increased number of sub-blocks. The paper discusses three companding techniques namely- µ-law, A-law and advance A-law companding technique. The analysis shows that the advance A-law companding techniques reduces the PAPR of the signal by adjusting the companding parameter within the range. VLC-OFDM systems are the future of the wireless communication but non-linearity in VLC-OFDM is a severe issue. The proposed paper discusses the techniques to reduce PAPR, one of the non-linearities of the system. The companding techniques mentioned in this paper provides better results without increasing the complexity of the system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=non-linear%20companding%20techniques" title="non-linear companding techniques">non-linear companding techniques</a>, <a href="https://publications.waset.org/abstracts/search?q=peak%20to%20average%20power%20ratio%20%28PAPR%29" title=" peak to average power ratio (PAPR)"> peak to average power ratio (PAPR)</a>, <a href="https://publications.waset.org/abstracts/search?q=visible%20light%20communication%20%28VLC%29" title=" visible light communication (VLC)"> visible light communication (VLC)</a>, <a href="https://publications.waset.org/abstracts/search?q=VLC-OFDM" title=" VLC-OFDM"> VLC-OFDM</a> </p> <a href="https://publications.waset.org/abstracts/43539/a-comparative-analysis-of-various-companding-techniques-used-to-reduce-papr-in-vlc-systems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43539.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">286</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15666</span> Channel Sounding and PAPR Reduction in OFDM for WiMAX Using Software Defined Radio </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=B.%20Siva%20Kumar%20Reddy">B. Siva Kumar Reddy</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Lakshmi"> B. Lakshmi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> WiMAX is a high speed broadband wireless access technology that adopted OFDM/OFDMA techniques to supply higher data rates with high spectral efficiency. However, OFDM suffers in view of high Peak to Average Power Ratio (PAPR) and high affect to synchronization errors. In this paper, the high PAPR problem is solved by using phase modulation to get Constant Envelop Orthogonal Frequency Division Multiplexing (CE-OFDM). The synchronization failures are brought down by employing a frequency lock loop, Poly phase clock synchronizer, Costas loop and blind equalizers such as Constant Modulus Algorithm (CMA) equalizer and Sign Kurtosis Maximization Adaptive Algorithm (SKMAA) equalizers. The WiMAX physical layer is executed on Software Defined Radio (SDR) prototype by utilizing USRP N210 as hardware and GNU Radio as software plat-forms. A SNR estimation is performed on the signal received through USRP N210. To empathize wireless propagation in specific environments, a sliding correlator wireless channel sounding system is designed by using SDR testbed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=BER" title="BER">BER</a>, <a href="https://publications.waset.org/abstracts/search?q=CMA%20equalizer" title=" CMA equalizer"> CMA equalizer</a>, <a href="https://publications.waset.org/abstracts/search?q=Kurtosis%20equalizer" title=" Kurtosis equalizer"> Kurtosis equalizer</a>, <a href="https://publications.waset.org/abstracts/search?q=GNU%20Radio" title=" GNU Radio"> GNU Radio</a>, <a href="https://publications.waset.org/abstracts/search?q=OFDM%2FOFDMA" title=" OFDM/OFDMA"> OFDM/OFDMA</a>, <a href="https://publications.waset.org/abstracts/search?q=USRP%20N210" title=" USRP N210"> USRP N210</a> </p> <a href="https://publications.waset.org/abstracts/14909/channel-sounding-and-papr-reduction-in-ofdm-for-wimax-using-software-defined-radio" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14909.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">349</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15665</span> Approximation Algorithms for Peak-Demand Reduction</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zaid%20Jamal%20Saeed%20Almahmoud">Zaid Jamal Saeed Almahmoud</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Smart grid is emerging as the future power grid, with smart techniques to optimize power consumption and electricity generation. Minimizing peak power consumption under a fixed delay requirement is a significant problem in the smart grid.For this problem, all appliances must be scheduled within a given finite time duration. We consider the problem of minimizing the peak demand under appliances constraints by scheduling power jobs with uniform release dates and deadlines. As the problem is known to be NP-hard, we analyze the performance of a version of the natural greedy heuristic for solving this problem. Our theoretical analysis and experimental results show that the proposed heuristic outperforms existing methods by providing a better approximation to the optimal solution. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=peak%20demand%20scheduling" title="peak demand scheduling">peak demand scheduling</a>, <a href="https://publications.waset.org/abstracts/search?q=approximation%20algorithms" title=" approximation algorithms"> approximation algorithms</a>, <a href="https://publications.waset.org/abstracts/search?q=smart%20grid" title=" smart grid"> smart grid</a>, <a href="https://publications.waset.org/abstracts/search?q=heuristics" title=" heuristics"> heuristics</a> </p> <a href="https://publications.waset.org/abstracts/157964/approximation-algorithms-for-peak-demand-reduction" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/157964.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">94</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15664</span> HPA Pre-Distorter Based on Neural Networks for 5G Satellite Communications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdelhamid%20Louliej">Abdelhamid Louliej</a>, <a href="https://publications.waset.org/abstracts/search?q=Younes%20Jabrane"> Younes Jabrane</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Satellites are becoming indispensable assets to fifth-generation (5G) new radio architecture, complementing wireless and terrestrial communication links. The combination of satellites and 5G architecture allows consumers to access all next-generation services anytime, anywhere, including scenarios, like traveling to remote areas (without coverage). Nevertheless, this solution faces several challenges, such as a significant propagation delay, Doppler frequency shift, and high Peak-to-Average Power Ratio (PAPR), causing signal distortion due to the non-linear saturation of the High-Power Amplifier (HPA). To compensate for HPA non-linearity in 5G satellite transmission, an efﬁcient pre-distorter scheme using Neural Networks (NN) is proposed. To assess the proposed NN pre-distorter, two types of HPA were investigated: Travelling Wave Tube Amplifier (TWTA) and Solid-State Power Amplifier (SSPA). The results show that the NN pre-distorter design presents EVM improvement by 95.26%. NMSE and ACPR were reduced by -43,66 dB and 24.56 dBm, respectively. Moreover, the system suffers no degradation of the Bit Error Rate (BER) for TWTA and SSPA amplifiers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=satellites" title="satellites">satellites</a>, <a href="https://publications.waset.org/abstracts/search?q=5G" title=" 5G"> 5G</a>, <a href="https://publications.waset.org/abstracts/search?q=neural%20networks" title=" neural networks"> neural networks</a>, <a href="https://publications.waset.org/abstracts/search?q=HPA" title=" HPA"> HPA</a>, <a href="https://publications.waset.org/abstracts/search?q=TWTA" title=" TWTA"> TWTA</a>, <a href="https://publications.waset.org/abstracts/search?q=SSPA" title=" SSPA"> SSPA</a>, <a href="https://publications.waset.org/abstracts/search?q=EVM" title=" EVM"> EVM</a>, <a href="https://publications.waset.org/abstracts/search?q=NMSE" title=" NMSE"> NMSE</a>, <a href="https://publications.waset.org/abstracts/search?q=ACPR" title=" ACPR"> ACPR</a> </p> <a href="https://publications.waset.org/abstracts/170447/hpa-pre-distorter-based-on-neural-networks-for-5g-satellite-communications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/170447.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">91</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15663</span> Effects of 8-Week Bee Bread Supplementation on Isokinetic Muscular Strength and Power in Young Athletes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fadzel%20Wong%20Chee%20Ping">Fadzel Wong Chee Ping</a>, <a href="https://publications.waset.org/abstracts/search?q=Chee%20Keong%20Chen"> Chee Keong Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=Foong%20Kiew%20Ooi"> Foong Kiew Ooi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahaneem%20Mohamed"> Mahaneem Mohamed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: To date, information on the effects of bee bread supplementation on isokinetic muscular performance are lacking. Therefore, this study was carried out to investigate the effects of 8-week bee bread supplementation on isokinetic muscular strength and power in young athletes. Methodology: Twelve male athletes (age: 24.0±1.8 years; BMI: 22.3 ± 1.3 kg.m-2; VO2max: 52.0 ± 2.8 mL.kg-1.min-1) were recruited in this randomised double blind, placebo-controlled crossover study. Participants consumed either bee bread at a dosage of 20 g.d-1 or placebo for 8 weeks. An isokinetic dynamometer was used to measure participants’ lower limb muscular strength and power prior (pre-test) and post (post-test) 8 weeks of experimental period. Testing angular velocities were set at 180o.s-1 and 300o.s-1 to determine knee flexion and extension muscular peak torque (an indicator of muscular strength) and average power of the participants. Statistical analyses were performed using ANOVA with repeated measures. Results: Isokinetic knee extension peak torque and average power at 180o.s-1, and isokinetic knee flexion peak torque and average power at 180o.s-1 were significantly (p<0.05) higher at post-test compared to pre-test with bee bread supplementation. However, significant differences were not observed in the measured parameters between pre- and post-test with placebo supplementation. Conclusion: Supplementation of bee bread for 8 weeks at a dosage of 20 g daily increased some of the measured isokinetic muscular strength and power parameters in young athletes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bee%20bread" title="bee bread">bee bread</a>, <a href="https://publications.waset.org/abstracts/search?q=isokinetic" title=" isokinetic"> isokinetic</a>, <a href="https://publications.waset.org/abstracts/search?q=power" title=" power"> power</a>, <a href="https://publications.waset.org/abstracts/search?q=strength" title=" strength "> strength </a> </p> <a href="https://publications.waset.org/abstracts/56220/effects-of-8-week-bee-bread-supplementation-on-isokinetic-muscular-strength-and-power-in-young-athletes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/56220.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">255</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15662</span> Reduction of Peak Input Currents during Charge Pump Boosting in Monolithically Integrated High-Voltage Generators</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jan%20Doutreloigne">Jan Doutreloigne</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper describes two methods for the reduction of the peak input current during the boosting of Dickson charge pumps. Both methods are implemented in the fully integrated Dickson charge pumps of a high-voltage display driver chip for smart-card applications. Experimental results reveal good correspondence with Spice simulations and show a reduction of the peak input current by a factor of 6 during boosting <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bi-stable%20display%20driver" title="bi-stable display driver">bi-stable display driver</a>, <a href="https://publications.waset.org/abstracts/search?q=Dickson%20charge%20pump" title=" Dickson charge pump"> Dickson charge pump</a>, <a href="https://publications.waset.org/abstracts/search?q=high-voltage%20generator" title=" high-voltage generator"> high-voltage generator</a>, <a href="https://publications.waset.org/abstracts/search?q=peak%20current%20reduction" title=" peak current reduction"> peak current reduction</a>, <a href="https://publications.waset.org/abstracts/search?q=sub-pump%20boosting" title=" sub-pump boosting"> sub-pump boosting</a>, <a href="https://publications.waset.org/abstracts/search?q=variable%20frequency%20boosting" title=" variable frequency boosting"> variable frequency boosting</a> </p> <a href="https://publications.waset.org/abstracts/34172/reduction-of-peak-input-currents-during-charge-pump-boosting-in-monolithically-integrated-high-voltage-generators" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34172.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">457</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15661</span> Piezoelectric Micro-generator Characterization for Energy Harvesting Application</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jos%C3%A9%20E.%20Q.%20Souza">José E. Q. Souza</a>, <a href="https://publications.waset.org/abstracts/search?q=Marcio%20Fontana"> Marcio Fontana</a>, <a href="https://publications.waset.org/abstracts/search?q=Antonio%20C.%20C.%20Lima"> Antonio C. C. Lima</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents analysis and characterization of a piezoelectric micro-generator for energy harvesting application. A low-cost experimental prototype was designed to operate as piezoelectric micro-generator in the laboratory. An input acceleration of 9.8m/s2 using a sine signal (peak-to-peak voltage: 1V, offset voltage: 0V) at frequencies ranging from 10Hz to 160Hz generated a maximum average power of 432.4μW (linear mass position = 25mm) and an average power of 543.3μW (angular mass position = 35°). These promising results show that the prototype can be considered for low consumption load application as an energy harvesting micro-generator. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=piezoelectric" title="piezoelectric">piezoelectric</a>, <a href="https://publications.waset.org/abstracts/search?q=micro-generator" title=" micro-generator"> micro-generator</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20harvesting" title=" energy harvesting"> energy harvesting</a>, <a href="https://publications.waset.org/abstracts/search?q=cantilever%20beam" title=" cantilever beam"> cantilever beam</a> </p> <a href="https://publications.waset.org/abstracts/88034/piezoelectric-micro-generator-characterization-for-energy-harvesting-application" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/88034.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">465</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15660</span> Impact of Weather Conditions on Generalized Frequency Division Multiplexing over Gamma Gamma Channel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Sameer%20Ahmed">Muhammad Sameer Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=Piotr%20Remlein"> Piotr Remlein</a>, <a href="https://publications.waset.org/abstracts/search?q=Tansal%20Gucluoglu"> Tansal Gucluoglu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The technique called as Generalized frequency division multiplexing (GFDM) used in the free space optical channel can be a good option for implementation free space optical communication systems. This technique has several strengths e.g. good spectral efficiency, low peak-to-average power ratio (PAPR), adaptability and low co-channel interference. In this paper, the impact of weather conditions such as haze, rain and fog on GFDM over the gamma-gamma channel model is discussed. A Trade off between link distance and system performance under intense weather conditions is also analysed. The symbol error probability (SEP) of GFDM over the gamma-gamma turbulence channel is derived and verified with the computer simulations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=free%20space%20optics" title="free space optics">free space optics</a>, <a href="https://publications.waset.org/abstracts/search?q=generalized%20frequency%20division%20multiplexing" title=" generalized frequency division multiplexing"> generalized frequency division multiplexing</a>, <a href="https://publications.waset.org/abstracts/search?q=weather%20conditions" title=" weather conditions"> weather conditions</a>, <a href="https://publications.waset.org/abstracts/search?q=gamma%20gamma%20distribution" title=" gamma gamma distribution"> gamma gamma distribution</a> </p> <a href="https://publications.waset.org/abstracts/127215/impact-of-weather-conditions-on-generalized-frequency-division-multiplexing-over-gamma-gamma-channel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/127215.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">174</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15659</span> The OQAM-OFDM System Using WPT/IWPT Replaced FFT/IFFT</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alaa%20H.%20Thabet">Alaa H. Thabet</a>, <a href="https://publications.waset.org/abstracts/search?q=Ehab%20F.%20Badran"> Ehab F. Badran</a>, <a href="https://publications.waset.org/abstracts/search?q=Moustafa%20H.%20Aly"> Moustafa H. Aly</a> </p> <p class="card-text"><strong>Abstract:</strong></p> With the rapid expand of wireless digital communications, demand for wireless systems that are reliable and have a high spectral efficiency have increased too. FBMC scheme based on the OFDM/OQAM has been recognized for its good performance to achieve high data rates. Fast Fourier Transforms (FFT) has been used to produce the orthogonal sub-carriers. Due to the drawbacks of OFDM -FFT based system which are the high peak-to-average ratio (PAR) and the synchronization. In this paper, Wavelet Packet Transform (WPT) is used in the place of FFT, and show better performance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=OQAM-OFDM" title="OQAM-OFDM">OQAM-OFDM</a>, <a href="https://publications.waset.org/abstracts/search?q=wavelet%20packet%20transform" title=" wavelet packet transform"> wavelet packet transform</a>, <a href="https://publications.waset.org/abstracts/search?q=PAPR" title=" PAPR"> PAPR</a>, <a href="https://publications.waset.org/abstracts/search?q=FFT" title=" FFT"> FFT</a> </p> <a href="https://publications.waset.org/abstracts/28850/the-oqam-ofdm-system-using-wptiwpt-replaced-fftifft" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28850.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">460</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15658</span> Multi-Impairment Compensation Based Deep Neural Networks for 16-QAM Coherent Optical Orthogonal Frequency Division Multiplexing System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ying%20Han">Ying Han</a>, <a href="https://publications.waset.org/abstracts/search?q=Yuanxiang%20Chen"> Yuanxiang Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=Yongtao%20Huang"> Yongtao Huang</a>, <a href="https://publications.waset.org/abstracts/search?q=Jia%20Fu"> Jia Fu</a>, <a href="https://publications.waset.org/abstracts/search?q=Kaile%20Li"> Kaile Li</a>, <a href="https://publications.waset.org/abstracts/search?q=Shangjing%20Lin"> Shangjing Lin</a>, <a href="https://publications.waset.org/abstracts/search?q=Jianguo%20Yu"> Jianguo Yu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In long-haul and high-speed optical transmission system, the orthogonal frequency division multiplexing (OFDM) signal suffers various linear and non-linear impairments. In recent years, researchers have proposed compensation schemes for specific impairment, and the effects are remarkable. However, different impairment compensation algorithms have caused an increase in transmission delay. With the widespread application of deep neural networks (DNN) in communication, multi-impairment compensation based on DNN will be a promising scheme. In this paper, we propose and apply DNN to compensate multi-impairment of 16-QAM coherent optical OFDM signal, thereby improving the performance of the transmission system. The trained DNN models are applied in the offline digital signal processing (DSP) module of the transmission system. The models can optimize the constellation mapping signals at the transmitter and compensate multi-impairment of the OFDM decoded signal at the receiver. Furthermore, the models reduce the peak to average power ratio (PAPR) of the transmitted OFDM signal and the bit error rate (BER) of the received signal. We verify the effectiveness of the proposed scheme for 16-QAM Coherent Optical OFDM signal and demonstrate and analyze transmission performance in different transmission scenarios. The experimental results show that the PAPR and BER of the transmission system are significantly reduced after using the trained DNN. It shows that the DNN with specific loss function and network structure can optimize the transmitted signal and learn the channel feature and compensate for multi-impairment in fiber transmission effectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coherent%20optical%20OFDM" title="coherent optical OFDM">coherent optical OFDM</a>, <a href="https://publications.waset.org/abstracts/search?q=deep%20neural%20network" title=" deep neural network"> deep neural network</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-impairment%20compensation" title=" multi-impairment compensation"> multi-impairment compensation</a>, <a href="https://publications.waset.org/abstracts/search?q=optical%20transmission" title=" optical transmission"> optical transmission</a> </p> <a href="https://publications.waset.org/abstracts/134219/multi-impairment-compensation-based-deep-neural-networks-for-16-qam-coherent-optical-orthogonal-frequency-division-multiplexing-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/134219.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">143</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15657</span> Statistical Channel Modeling for Multiple-Input-Multiple-Output Communication System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20I.%20Youssef">M. I. Youssef</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20E.%20Emam"> A. E. Emam</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Abd%20Elghany"> M. Abd Elghany</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The performance of wireless communication systems is affected mainly by the environment of its associated channel, which is characterized by dynamic and unpredictable behavior. In this paper, different statistical earth-satellite channel models are studied with emphasize on two main models, first is the Rice-Log normal model, due to its representation for the environment including shadowing and multi-path components that affect the propagated signal along its path, and a three-state model that take into account different fading conditions (clear area, moderate shadow and heavy shadowing). The provided models are based on AWGN, Rician, Rayleigh, and log-normal distributions were their Probability Density Functions (PDFs) are presented. The transmission system Bit Error Rate (BER), Peak-Average-Power Ratio (PAPR), and the channel capacity vs. fading models are measured and analyzed. These simulations are implemented using MATLAB tool, and the results had shown the performance of transmission system over different channel models. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fading%20channels" title="fading channels">fading channels</a>, <a href="https://publications.waset.org/abstracts/search?q=MIMO%20communication" title=" MIMO communication"> MIMO communication</a>, <a href="https://publications.waset.org/abstracts/search?q=RNS%20scheme" title=" RNS scheme"> RNS scheme</a>, <a href="https://publications.waset.org/abstracts/search?q=statistical%20modeling" title=" statistical modeling"> statistical modeling</a> </p> <a href="https://publications.waset.org/abstracts/91503/statistical-channel-modeling-for-multiple-input-multiple-output-communication-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/91503.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">149</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15656</span> Tuning of the Thermal Capacity of an Envelope for Peak Demand Reduction</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Isha%20Rathore">Isha Rathore</a>, <a href="https://publications.waset.org/abstracts/search?q=Peeyush%20Jain"> Peeyush Jain</a>, <a href="https://publications.waset.org/abstracts/search?q=Elangovan%20Rajasekar"> Elangovan Rajasekar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The thermal capacity of the envelope impacts the cooling and heating demand of a building and modulates the peak electricity demand. This paper presents the thermal capacity tuning of a building envelope to minimize peak electricity demand for space cooling. We consider a 40 m² residential testbed located in Hyderabad, India (Composite Climate). An EnergyPlus model is validated using real-time data. A Parametric simulation framework for thermal capacity tuning is created using the Honeybee plugin. Diffusivity, Thickness, layer position, orientation and fenestration size of the exterior envelope are parametrized considering a five-layered wall system. A total of 1824 parametric runs are performed and the optimum wall configuration leading to minimum peak cooling demand is presented. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thermal%20capacity" title="thermal capacity">thermal capacity</a>, <a href="https://publications.waset.org/abstracts/search?q=tuning" title=" tuning"> tuning</a>, <a href="https://publications.waset.org/abstracts/search?q=peak%20demand%20reduction" title=" peak demand reduction"> peak demand reduction</a>, <a href="https://publications.waset.org/abstracts/search?q=parametric%20analysis" title=" parametric analysis"> parametric analysis</a> </p> <a href="https://publications.waset.org/abstracts/143562/tuning-of-the-thermal-capacity-of-an-envelope-for-peak-demand-reduction" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/143562.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">184</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15655</span> Nuclear Power Plant Radioactive Effluent Discharge Management in China</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jie%20Yang">Jie Yang</a>, <a href="https://publications.waset.org/abstracts/search?q=Qifu%20Cheng"> Qifu Cheng</a>, <a href="https://publications.waset.org/abstracts/search?q=Yafang%20Liu"> Yafang Liu</a>, <a href="https://publications.waset.org/abstracts/search?q=Zhijie%20Gu"> Zhijie Gu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Controlled emissions of effluent from nuclear power plants are an important means of ensuring environmental safety. In order to fully grasp the actual discharge level of nuclear power plant in China's nuclear power plant in the pressurized water reactor and heavy water reactor, it will use the global average nuclear power plant effluent discharge as a reference to the standard analysis of China's nuclear power plant environmental discharge status. The results show that the average normalized emission of liquid tritium in PWR nuclear power plants in China is slightly higher than the global average value, and the other nuclides emissions are lower than the global average values. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=radioactive%20effluent" title="radioactive effluent">radioactive effluent</a>, <a href="https://publications.waset.org/abstracts/search?q=HWR" title=" HWR"> HWR</a>, <a href="https://publications.waset.org/abstracts/search?q=PWR" title=" PWR"> PWR</a>, <a href="https://publications.waset.org/abstracts/search?q=nuclear%20power%20plant" title=" nuclear power plant"> nuclear power plant</a> </p> <a href="https://publications.waset.org/abstracts/81396/nuclear-power-plant-radioactive-effluent-discharge-management-in-china" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/81396.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">243</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15654</span> High-Efficiency Comparator for Low-Power Application</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Yousefi">M. Yousefi</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Nasirzadeh"> N. Nasirzadeh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, dynamic comparator structure employing two methods for power consumption reduction with applications in low-power high-speed analog-to-digital converters have been presented. The proposed comparator has low consumption thanks to power reduction methods. They have the ability for offset adjustment. The comparator consumes 14.3 μW at 100 MHz which is equal to 11.8 fJ. The comparator has been designed and simulated in 180 nm CMOS. Layouts occupy 210 μm<sup>2</sup>. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=efficiency" title="efficiency">efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=comparator" title=" comparator"> comparator</a>, <a href="https://publications.waset.org/abstracts/search?q=power" title=" power"> power</a>, <a href="https://publications.waset.org/abstracts/search?q=low" title=" low"> low</a> </p> <a href="https://publications.waset.org/abstracts/53358/high-efficiency-comparator-for-low-power-application" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/53358.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">358</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15653</span> Reduced Power Consumption by Randomization for DSI3</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=David%20Levy">David Levy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The newly released Distributed System Interface 3 (DSI3) Bus Standard specification defines 3 modulation levels from which 16 valid symbols are coded. This structure creates power consumption variations depending on the transmitted data of a factor of more than 2 between minimum and maximum. The power generation unit has to consider therefore the worst case maximum consumption all the time and be built accordingly. This paper proposes a method to reduce both the average current consumption and worst case current consumption. The transmitter randomizes the data using several pseudo-random sequences. It then estimates the energy consumption of the generated frames and selects to transmit the one which consumes the least. The transmitter also prepends the index of the pseudo-random sequence, which is not randomized, to allow the receiver to recover the original data using the correct sequence. We show that in the case that the frame occupies most of the DSI3 synchronization period, we achieve average power consumption reduction by up to 13% and the worst case power consumption is reduced by 17.7%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=DSI3" title="DSI3">DSI3</a>, <a href="https://publications.waset.org/abstracts/search?q=energy" title=" energy"> energy</a>, <a href="https://publications.waset.org/abstracts/search?q=power%20consumption" title=" power consumption"> power consumption</a>, <a href="https://publications.waset.org/abstracts/search?q=randomization" title=" randomization"> randomization</a> </p> <a href="https://publications.waset.org/abstracts/18945/reduced-power-consumption-by-randomization-for-dsi3" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18945.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">538</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15652</span> Analysis of Grid Connected High Concentrated Photovoltaic Systems for Peak Load Shaving in Kuwait</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Adel%20A.%20Ghoneim">Adel A. Ghoneim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Air conditioning devices are substantially utilized in the summer months, as a result maximum loads in Kuwait take place in these intervals. Peak energy consumption are usually more expensive to satisfy compared to other standard power sources. The primary objective of the current work is to enhance the performance of high concentrated photovoltaic (HCPV) systems in an attempt to minimize peak power usage in Kuwait using HCPV modules. High concentrated PV multi-junction solar cells provide a promising method towards accomplishing lowest pricing per kilowatt-hour. Nevertheless, these cells have various features that should be resolved to be feasible for extensive power production. A single diode equivalent circuit model is formulated to analyze multi-junction solar cells efficiency in Kuwait weather circumstances taking into account the effects of both the temperature and the concentration ratio. The diode shunt resistance that is commonly ignored in the established models is considered in the present numerical model. The current model results are successfully validated versus measurements from published data to within 1.8% accuracy. Present calculations reveal that the single diode model considering the shunt resistance provides accurate and dependable results. The electrical efficiency (η) is observed to increase with concentration to a specific concentration level after which it reduces. Implementing grid systems is noticed to increase with concentration to a certain concentration degree after which it decreases. Employing grid connected HCPV systems results in significant peak load reduction. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=grid%20connected" title="grid connected">grid connected</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20concentrated%20photovoltaic%20systems" title=" high concentrated photovoltaic systems"> high concentrated photovoltaic systems</a>, <a href="https://publications.waset.org/abstracts/search?q=peak%20load" title=" peak load"> peak load</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20cells" title=" solar cells"> solar cells</a> </p> <a href="https://publications.waset.org/abstracts/82643/analysis-of-grid-connected-high-concentrated-photovoltaic-systems-for-peak-load-shaving-in-kuwait" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/82643.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">155</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15651</span> Heuristics for Optimizing Power Consumption in the Smart Grid</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zaid%20Jamal%20Saeed%20Almahmoud">Zaid Jamal Saeed Almahmoud</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Our increasing reliance on electricity, with inefficient consumption trends, has resulted in several economical and environmental threats. These threats include wasting billions of dollars, draining limited resources, and elevating the impact of climate change. As a solution, the smart grid is emerging as the future power grid, with smart techniques to optimize power consumption and electricity generation. Minimizing the peak power consumption under a fixed delay requirement is a significant problem in the smart grid. In addition, matching demand to supply is a key requirement for the success of the future electricity. In this work, we consider the problem of minimizing the peak demand under appliances constraints by scheduling power jobs with uniform release dates and deadlines. As the problem is known to be NP-Hard, we propose two versions of a heuristic algorithm for solving this problem. Our theoretical analysis and experimental results show that our proposed heuristics outperform existing methods by providing a better approximation to the optimal solution. In addition, we consider dynamic pricing methods to minimize the peak load and match demand to supply in the smart grid. Our contribution is the proposal of generic, as well as customized pricing heuristics to minimize the peak demand and match demand with supply. In addition, we propose optimal pricing algorithms that can be used when the maximum deadline period of the power jobs is relatively small. Finally, we provide theoretical analysis and conduct several experiments to evaluate the performance of the proposed algorithms. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heuristics" title="heuristics">heuristics</a>, <a href="https://publications.waset.org/abstracts/search?q=optimization" title=" optimization"> optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=smart%20grid" title=" smart grid"> smart grid</a>, <a href="https://publications.waset.org/abstracts/search?q=peak%20demand" title=" peak demand"> peak demand</a>, <a href="https://publications.waset.org/abstracts/search?q=power%20supply" title=" power supply"> power supply</a> </p> <a href="https://publications.waset.org/abstracts/158813/heuristics-for-optimizing-power-consumption-in-the-smart-grid" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/158813.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">88</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15650</span> The Effects of Menstrual Phase on Upper and Lower Body Anaerobic Performance in College-Aged Women</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kelsey%20Scanlon">Kelsey Scanlon</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: With the rate of female collegiate and professional athletes on the rise in recent decades, fluctuations in physical performance in relation to the menstrual cycle is an important area of study. PURPOSE: The purpose of this research was to compare differences in upper and lower body maximal anaerobic capacities across a single menstrual cycle. Methode: Participants (n=11) met a total of four times; once for familiarization and again on day 1 of menses (follicular phase), day 14 (ovulation), and day 21 (luteal phase) respectively. Upper body power was assessed using a bench press weight of ~50% of the participant’s predetermined 1-repetition maximum (1-RM) on a ballistic measurement system and variables included peak force (N), mean force (N), peak power (W), mean power (W), and peak velocity (m/s). Lower body power output was collected using a standard Wingate test. The variables of interest were anaerobic capacity (w/kg), peak power (W), mean power (W), fatigue index (W/s), and total work (J). Result: Statistical significance was not observed (p > 0.05) in any of the aforementioned variables after completing multiple one ways of analyses of variances (ANOVAs) with repeated measures on time. Conclusion: Within the parameters of this research, neither female upper nor lower body power output differed across the menstrual cycle when analyzed using 50% of one repetition (1RM) maximal bench press and the 30-second maximal effort cycle ergometer Wingate test. Therefore, researchers should not alter their subject populations due to the incorrect assumption that power output may be influenced by the menstrual cycle. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anaerobic" title="anaerobic">anaerobic</a>, <a href="https://publications.waset.org/abstracts/search?q=athlete" title=" athlete"> athlete</a>, <a href="https://publications.waset.org/abstracts/search?q=female" title=" female"> female</a>, <a href="https://publications.waset.org/abstracts/search?q=power" title=" power"> power</a> </p> <a href="https://publications.waset.org/abstracts/93962/the-effects-of-menstrual-phase-on-upper-and-lower-body-anaerobic-performance-in-college-aged-women" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/93962.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">146</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15649</span> Battery Control with Moving Average Algorithm to Smoothen the Intermittent Output Power of Photovoltaic Solar Power Plants in Off-Grid Configuration</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Gillfran%20Samual">Muhammad Gillfran Samual</a>, <a href="https://publications.waset.org/abstracts/search?q=Rinaldy%20Dalimi"> Rinaldy Dalimi</a>, <a href="https://publications.waset.org/abstracts/search?q=Fauzan%20Hanif%20Jufri"> Fauzan Hanif Jufri</a>, <a href="https://publications.waset.org/abstracts/search?q=Budi%20Sudiarto"> Budi Sudiarto</a>, <a href="https://publications.waset.org/abstracts/search?q=Ismi%20Rosyiana%20Fitri"> Ismi Rosyiana Fitri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Solar energy is increasingly recognized as an important future energy source due to its abundant availability and renewable nature. However, the intermittent nature of solar energy can cause fluctuations in the electricity produced, making it difficult to guarantee a stable and reliable electricity supply. One solution that can be implemented is to use batteries in a photovoltaic solar power plant system with a Moving Average control algorithm, which can help smooth and reduce fluctuations in solar power output power. The parameter that can be adjusted in the Moving Average algorithm is the window size or the arithmetic average width of the photovoltaic output power over time. This research evaluates the effect of a change of window size parameter in the Moving Average algorithm on the resulting smoothed photovoltaic output power and the technical effects on batteries, i.e., power and energy usage. Based on the evaluation, it is found that the increase of window size parameter will slow down the response of photovoltaic output power to changes in irradiation and increase the smoothing quality of the intermittent photovoltaic output power. In addition, increasing the window size will reduce the maximum power received on the load side, and the amount of energy used by the battery during the power smoothing process will increase, which, in turn, increases the required battery capacity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=battery" title="battery">battery</a>, <a href="https://publications.waset.org/abstracts/search?q=intermittent" title=" intermittent"> intermittent</a>, <a href="https://publications.waset.org/abstracts/search?q=moving%20average" title=" moving average"> moving average</a>, <a href="https://publications.waset.org/abstracts/search?q=photovoltaic" title=" photovoltaic"> photovoltaic</a>, <a href="https://publications.waset.org/abstracts/search?q=power%20smoothing" title=" power smoothing"> power smoothing</a> </p> <a href="https://publications.waset.org/abstracts/186512/battery-control-with-moving-average-algorithm-to-smoothen-the-intermittent-output-power-of-photovoltaic-solar-power-plants-in-off-grid-configuration" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/186512.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">62</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15648</span> Dust and Soling Accumulation Effect on Photovoltaic Systems in MENA Region</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=I.%20Muslih">I. Muslih</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Alkhalailah"> A. Alkhalailah</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Merdji"> A. Merdji</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Photovoltaic efficiency is highly affected by dust accumulation; the dust particles prevent direct solar radiation from reaching the panel surface; therefore a reduction in output power will occur. A study of dust and soiling accumulation effect on the output power of PV panels was conducted for different periods of time from May to October in three countries of the MENA region, Jordan, Egypt, and Algeria, under local weather conditions. This study leads to build a more realistic equation to estimate the power reduction as a function of time. This logarithmic function shows the high reduction in power in the first days with 10% reduction in output power compared to the reference system, where it reaches a steady state value after 60 days to reach a maximum value of 30%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dust%20effect" title="dust effect">dust effect</a>, <a href="https://publications.waset.org/abstracts/search?q=MENA" title=" MENA"> MENA</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20energy" title=" solar energy"> solar energy</a>, <a href="https://publications.waset.org/abstracts/search?q=PV%20system" title=" PV system"> PV system</a> </p> <a href="https://publications.waset.org/abstracts/75157/dust-and-soling-accumulation-effect-on-photovoltaic-systems-in-mena-region" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/75157.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">219</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15647</span> Dust and Soling Accumulation Effect on Photovoltaic Systems in Middle East and North Africa Region</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Iyad%20Muslih">Iyad Muslih</a>, <a href="https://publications.waset.org/abstracts/search?q=Azzah%20Alkhalailah"> Azzah Alkhalailah</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Merdji"> Ali Merdji</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Photovoltaic efficiency is highly affected by dust accumulation; the dust particles prevent direct solar radiation from reaching the panel surface; therefore a reduction in output power will occur. A study of dust and soiling accumulation effect on the output power of PV panels was conducted for different periods of time from May to October in three countries of the MENA region, Jordan, Egypt, and Algeria, under local weather conditions. This study leads to build a more realistic equation to estimate the power reduction as a function of time. This logarithmic function shows the high reduction in power in the first days with 10% reduction in output power compared to the reference system, where it reaches a steady state value after 60 days to reach a maximum value of 30%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=solar%20energy" title="solar energy">solar energy</a>, <a href="https://publications.waset.org/abstracts/search?q=PV%20system" title=" PV system"> PV system</a>, <a href="https://publications.waset.org/abstracts/search?q=soiling" title=" soiling"> soiling</a>, <a href="https://publications.waset.org/abstracts/search?q=MENA" title=" MENA"> MENA</a> </p> <a href="https://publications.waset.org/abstracts/74260/dust-and-soling-accumulation-effect-on-photovoltaic-systems-in-middle-east-and-north-africa-region" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/74260.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">219</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15646</span> Achievable Average Secrecy Rates over Bank of Parallel Independent Fading Channels with Friendly Jamming</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Munnujahan%20Ara">Munnujahan Ara</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we investigate the effect of friendly jamming power allocation strategies on the achievable average secrecy rate over a bank of parallel fading wiretap channels. We investigate the achievable average secrecy rate in parallel fading wiretap channels subject to Rayleigh and Rician fading. The achievable average secrecy rate, due to the presence of a line-of-sight component in the jammer channel is also evaluated. Moreover, we study the detrimental effect of correlation across the parallel sub-channels, and evaluate the corresponding decrease in the achievable average secrecy rate for the various fading configurations. We also investigate the tradeoff between the transmission power and the jamming power for a fixed total power budget. Our results, which are applicable to current orthogonal frequency division multiplexing (OFDM) communications systems, shed further light on the achievable average secrecy rates over a bank of parallel fading channels in the presence of friendly jammers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fading%20parallel%20channels" title="fading parallel channels">fading parallel channels</a>, <a href="https://publications.waset.org/abstracts/search?q=wire-tap%20channel" title=" wire-tap channel"> wire-tap channel</a>, <a href="https://publications.waset.org/abstracts/search?q=OFDM" title=" OFDM"> OFDM</a>, <a href="https://publications.waset.org/abstracts/search?q=secrecy%20capacity" title=" secrecy capacity"> secrecy capacity</a>, <a href="https://publications.waset.org/abstracts/search?q=power%20allocation" title=" power allocation"> power allocation</a> </p> <a href="https://publications.waset.org/abstracts/25080/achievable-average-secrecy-rates-over-bank-of-parallel-independent-fading-channels-with-friendly-jamming" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/25080.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">512</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=peak%20to%20average%20power%20reduction%20%28PAPR%29&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=peak%20to%20average%20power%20reduction%20%28PAPR%29&page=3">3</a></li> <li class="page-item"><a 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