基于Simulink的LDPC码仿真研究

Simulation Study of LDPC Codes Based on Simulink

在传统LDPC的构造方法基础上,提出了一种具有满秩特点的校验矩阵构造算法,在AWGN信道下结合Simulink进行了系统级仿真。结果表明,新的校验矩阵构造出的LDPC码系统性能优于Galager构造的LDPC码系统性能,LDPC码的短码误码性能劣于长码,LDPC码的码率越高性能越低,LDPC译码增加迭代次数后性能提升。

Based on the traditional construction methods for LDPC,a construction algorithm of full rank check matrix is presented,which is simulated with Simulink under the condition of AWGN channel.Simulation result shows that the system performance of LDPC constructed from the new check matrix is superior to that of LDPC constructed by Galager,the error code performance of the LDPC short code is inferior to that of the long code,the higher LDPC code rate has and the lower code performance is,LDPC decoding performance can improve when the number of iterations increases.