Binary LDPC Codes Performance using Simplified Max-Log-MAP Algorithm for High Order Constellations over Gaussian Channel

  IJETT-book-cover  International Journal of Recent Engineering Science (IJRES)          
  
© 2019 by IJRES Journal
Volume-6 Issue-3
Year of Publication : 2019
Authors : Latifa Mostari
  10.14445/23497157/IJRES-V6I3P103

MLA 

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.