New research on unequal error protection (UEP) property of irregular LDPC codes

Xiumei Yang, D. Yuan, Piming Ma, M. Jiang
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引用次数: 17

Abstract

A new scheme is proposed about how to make use of the unequal error protection (UEP) property of irregular low-density parity-check (LDPC) codes. By means of the construction of a weight-increasing parity-check matrix and systematic encoding, the mapping between the important information data and the elite bits of an irregular LDPC code becomes traceable and tractable. Thus, the inherent UEP property of irregular LDPC codes is not the theoretical interest any more. The proposed scheme makes it practical to implement UEP in system applications. Taking an irregular LDPC code with code length 10000 and code rate one half as an example, simulation results are presented over AWGN channels. The validity of the proposed scheme is verified by simulation.
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不规则LDPC码的不等错误保护(UEP)特性研究
提出了一种利用不规则低密度校验码的不等错保护(UEP)特性的新方案。通过构造权重递增的奇偶校验矩阵和系统编码,使不规则LDPC码的重要信息数据与精英位之间的映射具有可追溯性和可处理性。因此,非规则LDPC码固有的极优性不再是理论研究的重点。该方案使UEP在系统应用中得以实现。以码长为10000、码率为1 / 2的不规则LDPC码为例,给出了在AWGN信道上的仿真结果。仿真结果验证了该方案的有效性。
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