LDPC码在AWGN信道中的性能研究  

Performance of Low Density Parity Check Code in AWGN Channel

作　　者：邵丽娜[1] 史萍[1] 骆超[1] 

机构地区：[1]中国传媒大学信息工程学院,北京100024

出　　处：《中国传媒大学学报（自然科学版）》2010年第1期77-82,共6页Journal of Communication University of China：Science and Technology

摘　　要：低密度奇偶校验码(LDPC码)以其低复杂度的迭代译码算法和可逼近信道容限的性能而成为目前最佳的编码技术之一。本文在对低密度奇偶校验码现有理论研究的基础上,系统地阐述了LDPC码的编译码思想,并对LDPC的译码方法进行了深入的研究。通过LDPC码在AWGN信道中应用的仿真实验,得到了LDPC码优于Turbo码的性能曲线,以及在译码中迭代次数对误码率影响的曲线图,并对实验结果进行了深入的分析。Low density parity check code has become one of the best coding technology because of its low complexity iterative decoding algorithm and its approximate to the limited channel capacity.In this paper,on the basis of the existing theory of low-density parity-check codes,its coding and decoding ideas based on the figure model are expatiated systemically.Then we present the decoding algorithms emphatically.The simulation results are obtained over AWGN channel with variable iterations,and a comparison of the results with Turbo codes shows that LDPC codes have better performance than Turbo codes.

关 键 词：LDPC码 AWGN信道 误码率 

分 类 号：TN919.8[电子电信—通信与信息系统]