摘要
基于IEEE802.16e标准下进行LDPC编码,对码速率分别为1/2、3/4、5/6,码长分别为576、1440、2304的LDPC码进行Matlab仿真研究.译码方式采用BP-Based算法,迭代译码30次;调制方式采用QPSK调制,传输过程为AWGN和瑞利衰落信道.仿真结果显示:LDPC码的译码算法相比于未编码的QPSK信号,性能大幅度提升,性能曲线具有快速下降的性质;随着信噪比的增加,误码率下降的很快;随着码长增加,信噪比的改善程度越好,误码率下降的也越快.
LDPC coding based on IEEE802.16e standard,LDPC codes with code rates of 1/2,3/4 and 5/6 and code lengths of 576,1440 and 2304 were respectively used for Matlab simulation research.Bp-based algorithm was adopted for decoding,30 times of decoding was iterative,and QPSK modulation was adopted for modulation.The transmission process was AWGN and Rayleigh fading channel.The simulation results show that the decoding algorithm performance of LDPC code is greatly improved compared with the uncoded QPSK signal,and the performance curve has the property of rapid decline.With the increase of SNR,bit error rate decreases rapidly.With the increase of code length,the better the improvement of SNR,the faster the bit error rate decreases.
作者
孙会楠
SUN Huinan(School of electronic and information engineering,Harbin Huade University,Harbin 150025,China)
出处
《徐州工程学院学报（自然科学版）》
CAS
2021年第2期27-33,共7页
Journal of Xuzhou Institute of Technology(Natural Sciences Edition)
基金
教育部产学合作协同育人项目(201802048020)。
