New Techniques for Upper-Bounding the ML Decoding Performance of Binary Linear Codes

New Techniques for Upper-Bounding the ML Decoding Performance of Binary Linear Codes
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提高二进制线性码 ML 解码性能上限的新技术

DOI:
10.1109/tcomm.2012.122712.120225
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发表时间:
2011-04
影响因子:
8.3
通讯作者:
Baoming Bai
Baoming Bai
中科院分区:
计算机科学2区
文献类型:
--
作者:
Xiao Ma;Jia Liu;Baoming Bai

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本文提出了一种新的技术来简化或改善加性白高斯噪声(AWGN)信道上的二元线性码的最大似然(ML)译码性能的大多数现有上界。首先,给出了Ma等人最近提出的基于截断权重谱的联合界。是根据Gallager的第一边界技术(GFBT)以详细的方式重新推导的,其中“好区域”由次优列表解码算法指定。由坏区域引起的错误概率可以是二项分布的尾概率的上界,而由好区域引起的错误概率可以是现有技术的上界。其次,我们提出了两种技术来加强好区域引起的错误概率的联合界。第一种技术是基于成对错误概率。第二种技术基于三元组错误概率,该概率可以通过任意三个双极向量形成非钝化三角形的事实来上界。所提出的边界改进了传统的并边界,但具有类似的复杂性,因为它们只涉及Q-函数。所提出的界限也可以根据误码概率进行调整。
In this paper, new techniques are presented to either simplify or improve most existing upper bounds on the maximum-likelihood (ML) decoding performance of the binary linear codes over additive white Gaussian noise (AWGN) channels. Firstly, the recently proposed union bound using truncated weight spectrum by Ma et al. is re-derived in a detailed way based on Gallager's first bounding technique (GFBT), where the "good region" is specified by a sub-optimal list decoding algorithm. The error probability caused by the bad region can be upper-bounded by the tail-probability of a binomial distribution, while the error probability caused by the good region can be upper-bounded by most existing techniques. Secondly, we propose two techniques to tighten the union bound on the error probability caused by the good region. The first technique is based on pair-wise error probabilities. The second technique is based on triplet-wise error probabilities, which can be upper-bounded by the fact that any three bipolar vectors form a non-obtuse triangle. The proposed bounds improve the conventional union bounds but have a similar complexity since they involve only the Q-function. The proposed bounds can also be adapted to bit-error probabilities.
DOI: 10.1109/tit.2010.2050797
发表时间: 2010-08
影响因子: 2.5
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期刊: IEEE Trans. Inf. Theory
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DOI: 10.1109/proc.1980.11696
发表时间: 1980-01-01
影响因子: 20.6
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