Quasi-Cyclic LDPC-coded Signal Space Diversity with Precoding over Fading Channels

摘要：

Signal space diversity (SSD) has been viewed as a very efficient method to increase the diversity order and the reliability of wireless transmission over fading channels. The LDPC code can provide powerful error protectiom The quasi cyclic structure which has significant advantage for memory efficiency, facilitates encoder and decoder implementation through shift register based circuits. The combination of quasi cyclic LDPC codes and SSD is an effective technique to improve the performance of communication system for fading channeL This paper discusses a signal space diversity with a precoder by adding a simple encoder before applying the rotation matrix that can be viewed as a SSD with rate below 1. We propose three design criteria and two implementation method. And we further consider a quasi-cyclic LDPCcoded signal space diversity with precoding and their rate re allocation between channel coding and SSD. The simulation results show that our scheme outperforms the conventional coded-SSD over the fading channel when we get a better rate allocation that depends on the specific channel coding.

关键词： Signal space diversity quasi-cycli LDPC codes Rotation matrix

作者: Jintao hu Zhiping Shi Yongsheng Wang Jiadong Xu

作者单位: School of electric and information. Northwestem Polytechnical University Xian, China National Key Lab. Of Science and Technology on Communications.University of Electronic Science and T

会议类型: 国际会议

会议名称: 2010 2nd International Conference on Signal Processing System(2010年信号处理系统国际会议 ICSPS 2010)

会议地点: 大连

会议语种:英文

页码: 1050-1054

在线出版日期: 2010-07-05（万方平台首次上网日期，不代表论文的发表时间）