LDPC码在协作MIMO系统中的设计与分析

The Design and Performance Analysis of LDPC Code in Cooperative MIMO System

协作通信是提高无线网络链路可靠性的最有效方法之一。文中将低密度奇偶校验码(LDPC)引入多用户协作通信系统中,提出了一种先进的系统设计,可以提供可靠、高效节能的传输方式。将规则与非规则LDPC码分别运用在协作系统中进行分析比较,理论分析和仿真表明,在相同条件下,编码后的系统系能优于未编码的系统性能,非规则LDPC码性能明显优于规则LDPC码。

Cooperative communication is one of the most efficient methods to improve reliability of wireless link.Low-density parity-check code（LDPC） is introduced into multi-user cooperative communication system.This paper proposes an advanced design to provide reliable and energy-efficient transmission.Two types of LDPC coded systems are employed and compared in the cooperative MIMO system.Theoretical analysis and simulation show that LDPC coded system performance is better than the uncoded system and irregular LDPC codes outperforms regular LDPC codes in the same conditions.