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短喷泉码硬译码性能的分析与优化

DOI: 10.13190/j.jbupt.2013.06.017, PP. 79-83

Keywords: 喷泉码,硬译码,延时,抖动

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Abstract:

为减少短喷泉码硬译码的延时和抖动,进行了理论分析和仿真优化.首先,推导了任意删除概率下硬译码延时和抖动的表达式,并分析了度数分布对这两者的影响;其次,针对几种典型短喷泉码,通过仿真优化降低了延时和抖动,其中,码长为1024包的2种Raptor码的最小延时和抖动分别可优化至9.56%和3.22%,比现有短喷泉码有较大提升,具有较强的实用性.

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