基于FPGA的准循环LDPC码低时延译码器设计

Low-Latency Decoder for Quasi-Cyclic LDPC Codes Based on FPGA

  • 摘要: 针对准循环低密度奇偶校验码(LDPC码),提出一种基于FPGA的低延时译码器硬件实现结构. 该译码器基于最小和译码算法,充分利用FPGA的RAM存储结构及流水线运算方式提高译码吞吐量,降低译码时延. 该结构适用于大部分准循环LDPC码,且译码迭代一次只需约2倍缩放因子大小的时钟数量. 与非流水线译码结构相比,在不增加资源占有率的情况下,译码时延降低到原来的1/7.

     

    Abstract: A hardware architecture scheme of low-latency decoder for quasi-cyclic LDPC (QC-LDPC) codes is proposed using Min-Sum decoding algorithm. It takes the advantages of configurable embedded memory in FPGA and pipelining operational mode to improve the throughput of a decoder for QC-LDPC codes. The decoding time complexity is only about 2 times the size of the zoom factor of quasi-cyclic parity check matrix. Compared with non-pipelining decoding structure, the decoding latency is reduced to the original 1/7 without increasing logical resources.

     

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