高阶调制LDPC码在水声信道中的仿真分析

Simulation of high-order modulation LDPC code in underwater acoustic channel

摘要:

为了提高频谱效率,对高阶调制的LDPC(Low Density Parity Check)码在水声信道中的应用进行仿真研究.使用高阶调制的软信息简化算法,降低了运算量.对影响LDPC码性能的码长、迭代次数等相关因素进行了分析与仿真,结果表明高阶调制的LDPC码能明显改善传输性能.

Abstract:

The simulation of a high-order modulation LDPC code is carried out in the field of underwater acoustic channel for improving the spectral efficiency.The computation complexity can be reduced by using the simplification algorithm of soft information of the high-order modulation.Effects of the code length,times of iterations and other related factors on the performance of LDPC codes are analyzed and simulated.The results show that the high-order modulation LDPC codes can significantly improve the transmission performance.