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-  2018 

一种高吞吐率的系统Raptor码并行译码方法
A High Throughput Parallel Decoding Method for Systematic Raptor Codes

DOI: 10.3969/j.issn.1001-0548.2018.06.003

Keywords: 数字喷泉码,降维译码,并行译码,系统Raptor码

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Abstract:

在系统Raptor码译码中,针对高复杂度的高斯消元运算导致译码延时大、吞吐率低的问题,提出一种低延时高吞吐率的降维并行译码方案。该方案采用仅对少量丢包译码的低复杂度降维运算,替换对全部源数据包译码的高斯消元运算,降低译码延时;并针对降维译码采用全并行的硬件结构实现,提高译码吞吐率。依此方案,在Xilinx FPGA XC7K410T平台上实现系统Raptor译码器。测试结果表明,当网络丢包率在10-2以下时,译码数据吞吐率达到3.5 Gbps,是相同硬件下采用高斯消元译码实现的80倍以上。

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