基于预编码系统的LDPC-SSD性能研究  

Study of LDPC-SSD Performance Based on Precoding System

作　　者：胡锦涛[1] 王永生[1] 许家栋[1] 王顶[1] 

机构地区：[1]西北工业大学电子信息学院,西安710129

出　　处：《计算机工程》2011年第3期105-107,共3页Computer Engineering

基　　金：航天支撑技术基金资助项目(2009XW080002);西北工业大学科技创新基金资助项目(2008KJ02023)

摘　　要：为有效提高通信系统在无线衰落信道中的性能,提出一种基于预编码的低密度奇偶校验码编码的信号空间分集(LDPC-SSD)系统。将信号空间分集旋转矩阵看作一个码率为1的编码器。在信号空间分集矩阵前加入一个预编码器。给出预编码器的3个设计准则。在无线衰落信道下,仿真基于预编码的LDPC-SSD系统。仿真结果表明,该方案比没有预编码的LDPC-SSD系统在衰落信道下具有更好的性能。In order to improve communication system performance in wireless fading channel, this paper proposes LDPC coded Signal Space Diversity（LDPC-SSD） with precoding system. The signal space diversity rotation matrix is considered as an encoder with code rate equal to 1. In this system, a precoder is added before the signal space diversity matrix. At the same time, three pre-encoder design criteria are given. The pre-encoded LDPC-SSD system is simulated in wireless fading channel. Simulation results show that the proposed scheme has better performance than those without pre-encoded LDPC-SSD system in wireless fading channel.

关 键 词：信号空间分集 准循环低密度奇偶校验码 旋转矩阵 分集阶数 预编码 

分 类 号：TN911.7[电子电信—通信与信息系统]