Hybrid weighted symbol-flipping decoding for nonbinary LDPC codes  

作　　者：刘冰 Tao Wei Dou Gaoqi Gao Jun 

机构地区：[1]Electronic College of Engineering,Naval University of Engineering [2]Marine Communication Technology Institute [3]China Marine Development & Research Center

出　　处：《High Technology Letters》2013年第1期58-62,共5页高技术通讯（英文版）

基　　金：Supported by the National High Technology Research and Development Programme of China(No.2009AAJ128,2009AAJ208,2010AA7010422)

摘　　要：A hybrid decoding algorithm is proposed for nonbinary low-density parity-check （LDPC） codes, which combines the weighted symbol-flipping （WSF） algorithm with the fast Fourier trans- form q-ary sum-product algorithm （FFT-QSPA）. The flipped position and value are determined by the symbol flipping metric and the received bit values in the first stage WSF algorithm. If the low- eomplexity WSF algorithm is failed, the second stage FFT-QSPA is activated as a switching strategy. Simulation results show that the proposed hybrid algorithm greatly reduces the computational complexity with the performance close to that of FFT-QSPA.A hybrid decoding algorithm is proposed for nonbinary low-density parity-check(LDPC)codes,which combines the weighted symbol-flipping(WSF)algorithm with the fast Fourier transform q-ary sum-product algorithm(FFT-QSPA).The flipped position and value are determined by the symbol flipping metric and the received bit values in the first stage WSF algorithm.If the lowcomplexity WSF algorithm is failed,the second stage FFT-QSPA is activated as a switching strategy.Simulation results show that the proposed hybrid algorithm greatly reduces the computational complexity with the performance close to that of FFT-QSPA.

关 键 词：nonbinary low-density （WSF） hybrid weighted symbol-flipping parity-check （LDPC） code （HWSF） iterative decoding weighted symbol-flipping 

分 类 号：TN911.22[电子电信—通信与信息系统]