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首页> 外文会议>IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications vol.2; 20050808-12; Beijing(CN) >Construction and Performance Analysis of Moderate-Length Rate-Compatible LDPC codes
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Construction and Performance Analysis of Moderate-Length Rate-Compatible LDPC codes

机译：兼容中长速率的LDPC码的构建和性能分析

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摘要

Rate-compatible coding is appropriate for communication systems that may experience a range of operating SNRs but that seek to adhere to a single underlying codec structure. This paper proposes two special and efficient approaches: extending and information-nulling, to build low rate codes from high rate LDPC codes (mother codes) of moderate length (10~3 < N < 10~4). Both the two proposed approaches result in better performances than punctured RC-LDPC codes at low code-rates. Extending leads to good performance at rate about 0.4～0.6, but which has not so good performance at high rates (about 0.6～0.8). The threshold of extended code rates is pointed out for the first time, which rests with the code-rate of the mother code. Information-nulling, which results in acceptable performance at high rates, and also good performance at low rates without any threshold of code rates, is confirmed to have a wider rate range and lower computation complexity than extending.
机译：速率兼容编码适用于可能会遇到一系列工作SNR但试图遵守单个基础编解码器结构的通信系统。本文提出了两种特殊而有效的方法：扩展和信息归零，以中等长度（10〜3

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