Lowering Error Floors by Concatenation of Low-Density Parity-Check and Array Code

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Concatenation of Low-Density Parity-Check and Array Code</title> <meta name="description" content="Lowering Error Floors by Concatenation of Low-Density Parity-Check and Array Code"> <meta name="keywords" content="concatenated coding, low鈥揹ensity parity鈥揷heck codes, array code, error floors"> <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 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publication-listing mt-3 mb-3"> <h5 class="card-header" style="font-size:.9rem">Lowering Error Floors by Concatenation of Low-Density Parity-Check and Array Code</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cinna%20Soltanpur">Cinna Soltanpur</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Ghamari"> Mohammad Ghamari</a>, <a href="https://publications.waset.org/abstracts/search?q=Behzad%20Momahed%20Heravi"> Behzad Momahed Heravi</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatemeh%20Zare"> Fatemeh Zare</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Low-density parity-check (LDPC) codes have been shown to deliver capacity approaching performance; however, problematic graphical structures (e.g. trapping sets) in the Tanner graph of some LDPC codes can cause high error floors in bit-error-ratio (BER) performance under conventional sum-product algorithm (SPA). This paper presents a serial concatenation scheme to avoid the trapping sets and to lower the error floors of LDPC code. The outer code in the proposed concatenation is the LDPC, and the inner code is a high rate array code. This approach applies an interactive hybrid process between the BCJR decoding for the array code and the SPA for the LDPC code together with bit-pinning and bit-flipping techniques. Margulis code of size (2640, 1320) has been used for the simulation and it has been shown that the proposed concatenation and decoding scheme can considerably improve the error floor performance with minimal rate loss. <iframe src="https://publications.waset.org/abstracts/60058.pdf" style="width:100%; height:400px;" frameborder="0"></iframe> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=concatenated%20coding" title="concatenated coding">concatenated coding</a>, <a href="https://publications.waset.org/abstracts/search?q=low%E2%80%93density%20parity%E2%80%93check%20codes" title=" low鈥揹ensity parity鈥揷heck codes"> low鈥揹ensity parity鈥揷heck codes</a>, <a href="https://publications.waset.org/abstracts/search?q=array%20code" title=" array code"> array code</a>, <a href="https://publications.waset.org/abstracts/search?q=error%20floors" title=" error floors"> error floors</a> </p> <a href="https://publications.waset.org/abstracts/60058/lowering-error-floors-by-concatenation-of-low-density-parity-check-and-array-code" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/60058.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">356</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/WASET-16th-foundational-anniversary.pdf">WASET celebrates its 16th foundational anniversary</a></li> </ul> </div> <div 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Lowering Error Floors by Concatenation of Low-Density Parity-Check and Array Code