Symbol Message Passing Decoding of LDPC Codes for Orthogonal Modulations

被引：0

作者：

Ben Yacoub, Emna ^{[1
]}

Matuz, Balazs ^{[2
]}

机构：

[1] Tech Univ Munich, Inst Commun Engn, Munich, Germany

[2] German Aerosp Ctr, Inst Commun & Nav, Cologne, Germany

来源：

2021-11TH INTERNATIONAL SYMPOSIUM ON TOPICS IN CODING (ISTC'21) | 2021年

关键词：

D O I：

10.1109/ISTC49272.2021.9594277

中图分类号：

TP31 [计算机软件];

学科分类号：

081202 ; 0835 ;

摘要：

A simple decoder for q-ary low-density parity-check codes is studied, termed symbol message passing. The decoder passes hard decisions from a q-ary alphabet. For orthogonal modulations over the additive white Gaussian channel for which the modulation order and the field order q are equal, it is shown that the extrinsic messages can be modelled as observations of a q-ary symmetric channel, allowing to work out density evolution equations. A stability analysis is provided which emphasizes the influence of degree-3 variable nodes. Simulation results show performance gains for increasing q w.r.t. binary low-density parity-check codes with bit-interleaved coded modulation, and potential savings in decoding complexity.

引用

页数：5

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