{"title":"Performance Evaluation of Refinement Method for Wideband Two-Beams Formation","authors":"C. Bunsanit","volume":121,"journal":"International Journal of Electrical and Computer Engineering","pagesStart":60,"pagesEnd":66,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10006150","abstract":"<p>This paper presents the refinement method for two beams formation of wideband smart antenna. The refinement method for weighting coefficients is based on Fully Spatial Signal Processing by taking Inverse Discrete Fourier Transform (IDFT), and its simulation results are presented using MATLAB. The radiation pattern is created by multiplying the incoming signal with real weights and then summing them together. These real weighting coefficients are computed by IDFT method; however, the range of weight values is relatively wide. Therefore, for reducing this range, the refinement method is used. The radiation pattern concerns with five input parameters to control. These parameters are maximum weighting coefficient, wideband signal, direction of mainbeam, beamwidth, and maximum of minor lobe level. Comparison of the obtained simulation results between using refinement method and taking only IDFT shows that the refinement method works well for wideband two beams formation.<\/p>\r\n","references":"[1]\tA. U. Bhobe, and P. L. Perini, \u201cAn Overview of smart antenna technology for wireless communication,\u201d IEEE Proceeding Aerospace Conference, vol. 2, 10-17 Mar. 2001, pp. 2\/875-2\/883.\r\n[2]\tM. Chryssomallis, \u201cSmart antenna.\u201d IEEE Antenna and Propagation magazine, vol. 42, 2000, pp. 129-136.\r\n[3]\tR. Kawitar, D. Wakde, and D. G, \u201cAdvance in Smart antenna systems,\u201d Journal of Scientific and Industrial Research, vol. 64, 2005, pp. 660-665.\r\n[4]\tJ. C. Liberti, and Rappaport, Smart Antennas for wireless communication IS-95 and Generation CDMA Applications. New Jersey: Prentice Hall, 1999.\r\n[5]\tR. H. Roy, \u201cAn Overview of smart antenna technology the next wave in wireless communications. IEEE Aerospace Conference, vol. 3, 1998, 339-345.\r\n[6]\tM. Uthansakul, and M. E. Bialkowski, \u201cImpact of wideband signals on smart antenna system,\u201d International Conference on Microwave, Radar and Wireless Communication, vol. 2, 2004, pp. 501-504.\r\n[7]\tM. Hefinawi, and G. Y. Delisle, \u201cImpact of wideband CDMA signal on smart antenna systems,\u201d ISSS International Conference on personal Wireless Communications, 2000, pp. 5-8.\r\n[8]\tM. Hefinawi, and G. Y. Delisle, \u201cPerformance analysis of wideband smart antenna system using difference frequency compensation.\u201d IEEE Symposium on Computers and Communications, 2000, pp. 237-242.\r\n[9]\tM. Uthansakul, and M. E. Bialkowski, \u201cAn Investigation into smart antenna configurations for wideband communication,\u201d International Conference on Microwave, Radar and Wireless Communication (MILOK), 2004, pp. 2:505-508.\r\n[10]\tM. Ghavami, \u201cAn Adaptive Wideband Array Using A Signal Real Multiplier for Each Antenna Element,\u201d IEEE International Symposium and Mobile Radio Communications, vol. 4, 15-18 Sept 2002, pp. 1805-1809.\r\n[11]\tM. Uthansakul and M.E. Bialkowski, \u201cA Wideband Beam-Steered Array Antenna Utilizing Real-Valued Weighting Coefficients,\u201d International Symposium on DSP and Communication System, 2005, pp. 237-241.\r\n[12]\tC. Bunsanit, P. Uthansakul, R Wongsan and M. Uthansakul, \u201cLow Profile Multi-Beam Former Operating in Wide Frequency Band,\u201d International Conference on Electrical Engineering\/Electronics, Computer, Telecommunication and Information Technology., 6-9 May 2009, pp.774-777.\r\n[13]\tC. Bunsanit, P. Uthansakul and M. Uthansakul, \u201cRefinement Method for Weighting Scheme of Fully Spatial Beamformer,\u201d International Journal of Antennas and Propagation, 2012, pp.1-13.\r\n[14]\tM. Uthansakul and M.E. Bialkowski, \u201cA Wideband Beam-Steered Array Antenna Utilizing Real-Valued Weighting Coefficients,\u201d International Symposium on DSP and Communication System, 2005, pp. 237-241.\r\n[15]\tM. Uthansakul and M. E. Bialkowski, \u201cDesign Wideband Spatial Beamformer for Low Sidelobe Radiation Pattern Performance,\u201d Asia-Pacific Microwave Conference (APMC), vol. 3, 4-7 Dec 2005, pp.1953-1956.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 121, 2017"}