Binary LDPC Codes Performance using Simplified Max-Log-MAP Algorithm for High Order Constellations over Gaussian Channel
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International Journal of Recent Engineering Science (IJRES) |  |
| © 2019 by IJRES Journal | ||
| Volume-6 Issue-3 |
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| Year of Publication : 2019 | ||
| Authors : Latifa Mostari |
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| DOI : 10.14445/23497157/IJRES-V6I3P103 |
Citation
MLA Style :Latifa Mostari "Binary LDPC Codes Performance using Simplified Max-Log-MAP Algorithm for High Order Constellations over Gaussian Channel" International Journal of Recent Engineering Science 6.3(2019):19-21.
APA Style :Latifa Mostari, Binary LDPC Codes Performance using Simplified Max-Log-MAP Algorithm for High Order Constellations over Gaussian Channel. International Journal of Recent Engineering Science, 6(3),19-21.
Abstract
Combining LDPC codes with high order constellations is an effective way to improve bandwidth efficiency. Since the LDPC codes require soft decisions regarding the input information, the constellation has to provide soft information (log-likelihood ratio) to it. In this paper, a simplified algorithm, called Simplified Max-Log-MAP algorithm, to calculate LLR is applied for binary LDPC codes, which remarkably reduce the computational complexity, and has nearly no performance loss.
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Keywords
LDPC codes, LLR, Max-log-Map algorithm, Pragmatic algorithm, QAM mapping, simplified Sum-Product Algorithm.