大时延扩展CDMA信道下空时多用户检测  

Parallel Factor Analysis Based Space-Time Multiuser Detection for CDMA System with Larger Delay Spread

作　　者：张小飞[1] 赵瑞娜[2] 徐大专[1] 

机构地区：[1]南京航空航天大学信息科学与技术学院,南京210016 [2]国家电力公司华东电力调度中心,上海200002

出　　处：《南京航空航天大学学报》2007年第2期204-207,共4页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：南京航空航天大学引进人才科研基金(S0583-041)资助项目;移动通信国家重点实验室开放基金(N200502)资助项目

摘　　要：提出了基于平行因子分析的大时延扩展CDM A信道下空时多用户检测算法。文中建立了大时延扩展CDM A信道下接收信号新模型,它将接收信号看成是2个三线性模型之和,并提出了广义三线性交替最小二乘的算法(TALS-G)进行空时多用户检测。仿真结果说明:TALS-G算法具有较好误码率性能,且该方法在阵列扰动情况下仍有较好的性能。它无需信道衰落系数和DOA信息,是盲信号检测方法,具有鲁棒性。Parallel factor analysis based space-time multiuser detection algorithm for CDMA systems with larger delay spread is presented. A new model for the received signal is established, and the received signal is the sum of two trilinear models. So the general trilinear alternating least square algorithm （TALS- G） is proposed for space-time multiuser detection. Simulation results reveal that TALS-G method has the better bit error rate performance in the larger spread. This algorithm works well under array error condition. The algorithm has robust characteristics, and it doesnot need the channel fading and the direction of arrival（DOA） information.

关 键 词：空时多用户检测 平行因子分析 CDMA系统 三线性模型 时延扩展 

分 类 号：TN911.7[电子电信—通信与信息系统]