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Generalized weighted bit-flipping LDPC decoding for asymmetric optical channels

机译:非对称光学通道的广义加权比特翻转LDPC解码

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摘要

Efficient low-complexity and low-latency forward error correction (FEC) decoding is vital in high-speed optical receivers. The weighted bit-flipping (WBF) decoding algorithm is a low-complexity and high-performance iterative decoder for low-density parity-check (LDPC) codes, devised for symmetric Gaussian channels. In this paper, we present a generalization of the WBF algorithm and its variants to discrete and continuous asymmetric optical channels which have signal-dependent noises. We have employed a fully analytical approach to derive the generalized WBF decoders, and show that they can achieve a net coding gain within 0.5 dB of that of the soft-decision near-optimal decoding. (C) 2021 Elsevier B.V. All rights reserved.
机译:高速低复杂性和低延迟前部纠错(FEC)解码在高速光接收器中至关重要。 加权比特翻转(WBF)解码算法是用于低密度奇偶校验(LDPC)代码的低复杂度和高性能迭代解码器,其设计用于对称高斯信道。 在本文中,我们介绍了WBF算法的概括,其变体与具有信号依赖性噪声的离散和连续的不对称光学信道。 我们采用了完全分析的方法来得出广泛的WBF解码器,并表明他们可以在0.5dB的软决策附近最佳解码中实现净编码增益。 (c)2021 elestvier b.v.保留所有权利。

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