摘要
针对时分同步码分多址(TD-SCDMA)上行失步以及强多址干扰的情况,提出了一种基于SAGE算法的空时分组多用户检测算法。该算法以各用户上行信号的DOA信息为基础,对接入用户的上行多径信号进行最大比合并,在空域进行分组,在每个组内进行多用户检测,最后利用SAGE算法进行迭代干扰消除。仿真结果表明,上行失步和强多址干扰情况下,该算法的误码率性能较传统的匹配滤波,联合检测以及解相关算法有较大的提升。
A space-time grouped multi-user detection algorithm based on SAGE algorithm in outof synchronous TD-SCDMA system with strong MAI is proposed. Based on the information of DOA of up-link signal,the multi-path signals are amalgamated under the max ratio principle and users are grouped in the space field,multi-user detection is carried out in every group,then SAGE algorithm are adopted to cancel the jamming.Simulation results show that out-of synchronous scenario with strong MAI demonstrate that the proposed algorithm exhibits better performance than conventional detector, such as marched filter,joint detection and decorrelation algorithm.
出处
《火力与指挥控制》
CSCD
北大核心
2014年第5期86-89,共4页
Fire Control & Command Control
