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An analysis and improvement of error control performance of IS-LDPC codes with a large number of subsets

机译:具有大量子集的IS-LDPC码的错误控制性能分析与改进

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摘要

Peak-to-Average Power Ratio (PAPR) is a major shortcoming of Orthogonal Frequency Division Multiplexing (OFDM) system. One attractive solution to this problem is Invertible-Subset Low-Density Parity Check (IS-LDPC) code. Although IS-LDPC codes perform distinctively in sense of controlling PAPR with low search complexity, their error control performance suffers from degradation when the number of invertible subsets increases. In this paper, the reasons for the aforementioned performance degradation are mathematically analyzed. Moreover, a heuristic search method is proposed to improve error control performance of IS-LDPC codes, while maintaining their good PAPR control performance, as well as low searching complexity. (C) 2018 Elsevier B.V. All rights reserved.
机译:峰均功率比(PAPR)是正交频分复用(OFDM)系统的主要缺点。此问题的一种有吸引力的解决方案是可转换子集低密度奇偶校验(IS-LDPC)代码。尽管IS-LDPC码在控制搜索复杂度较低的PAPR方面表现出众,但当可逆子集数量增加时,其差错控制性能会下降。本文对上述性能下降的原因进行了数学分析。此外,提出了一种启发式搜索方法,以提高IS-LDPC码的差错控制性能,同时保持其良好的PAPR控制性能以及较低的搜索复杂度。 (C)2018 Elsevier B.V.保留所有权利。

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