LTE-A协同通信链路部分信道预编码传输  

Partial Channel Precoding for LTE-advanced Cooperative Transmission

作　　者：厉东明[1] 黄学军[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003

出　　处：《南京邮电大学学报（自然科学版）》2011年第5期33-37,共5页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家重点基础研究发展计划(973计划)(2007CB310600);江苏省博士后科研资助计划(0902026C)资助项目

摘　　要：为了实现协同传输系统上行链路源和中继上的预编码传输,并与空时分组码相结合来改善实际传输的性能,使用一种基于迫零算法的预编码方案。针对迫零算法功率效率低的问题提出了一种基于接收信噪比最大的非完全信道预编码,得以将传统MIMO系统中的预编码技术运用于协同通信系统中。链路级仿真结果表明,在源端及中继端采取预编码处理并与空时分组码相结合能够有效地改善协作传输系统的性能,而且选择信道状态较好的用户进行预编码可以在不增加发射功率的情况下改善迫零预编码系统的接收信噪比。For the sake of improving the practical system performance by precoding transmission not only at the source terminals but also at the relay nodes for the uplink of the cooperative transmission system,the zero-forcing precoding algorithm was realized.The proposed partial channel precoding scheme based on maximum received signal to noise ratio was introduced to clear the hurdles of low power efficiency of zero-forcing precoding,precoders traditionally used in MIMO system were thus performed into cooperative system.Simulation results showed that the performance of cooperative transmission can be improved effectively by precoders combined with space time code not only on the source but also on the relay nodes,moreover,the received signal power can be improved for zero-forcing precoding without increment of transmitting power by performing precoding on good-conditioned channels.The proposed scheme is meaningful to the implement of LTE-Advanced system for it＇s available for the uplink transmission.

关 键 词：部分信道预编码 协作多点传输 迫零预编码 信号干扰噪声比 

分 类 号：TN929.5[电子电信—通信与信息系统]