分析了低密度校验(LDPC)码译码所产生的错误码字中码位的译码输出量可靠度信息的统计特性。

For the detected error words by the LDPC decoder, the characteristics of code bits reliability information is investigated.

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分析了主流的LZ 77算法编译码原理，讨论了输入误码对译码字典和解压数据的影响，研究了误码传播问题。

Based on analysis of LZ77 compression algorithm, this paper discusses the effect of input error codes to the decoding wordbook and decompression data, and researches error code transmission issue.

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采用这种码字转换方法，系统误码率性能远远高于没有进行码字转换的系统性能。

The simulation results show that the OCDMA system using the code converters has better BER performance than that without code converters. The data can be successfully transmitted.

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