摘要
介绍了低密度校验码LDPC码的和乘积Sum-Product译码算法,并对AWGN和瑞利信道下的性能进行了仿真(VC++)。在AWGN信道下,通过码长和迭代次数对误码性能的影响的仿真比较表明,码长越长,迭代次数越大,误码性能越好。在瑞利信道下,仿真表明LDPC码同样具有很好的误码性能,未知信道信息时的误码性能要比已知信道信息时差。
In this paper, Sum-Product Algorithm for decoding Low Density Parity Check(LDPC) codes is presented and simulations under AWGN and Rayleigh channel are given too. The comparison in code length and iterations shows that long code length and more iteration can improve the performance. LDPC codes gets good performance for Rayleigh channel, performance of knowing the channel information is better than unknown.
出处
《通信技术》
2005年第S1期17-19,共3页
Communications Technology
