DS-CDMA系统中基于盲分离的DOA估计  

DOA estimation based on blind source separation for DS-CDMA systems

作　　者：王维新[1] 吴镇扬[1] 彭岳星[1] 刘陈[1] 

机构地区：[1]东南大学无线电工程系,江苏南京210096

出　　处：《电波科学学报》2005年第2期226-230,共5页Chinese Journal of Radio Science

基　　金：国家高科技发展计划资助项目(No.2001AA123015)

摘　　要：针对异步DSCDMA系统的多用户环境,提出了一种适用于过载状态(路径总数大于天线阵元数)下的DOA估计算法。该算法首先基于最小输出能量(MOE)准则分离出感兴趣信息,此时,感兴趣信息中包含的路径数小于天线阵元数;然后采用计算简便的矩阵点除算法高效地解析出各DOA信息。算法具有计算量小,估计精度高等优点。仿真实验验证了算法的有效性。This paper presents a DOA estimation algorithm for overloaded asynchronous DS-CDMA systems where the number of the multipath components exceeds that of antenna array s elements. The signal of interested (SOI) is separated first based on the minimum energy output (MOE) criteria so that the number of multipath components in SOI is less than that of antenna array's elements. Then, a computation effective element-wise division (EWD) algorithm is adopted to resolve DOA s efficiently. The algorithm has the advantages of low-complexity and high accuracy. Simulation results confirm the effectiveness of the algorithm.

关 键 词：波达方向 智能天线 空时信号处理 

分 类 号：TN911.7[电子电信—通信与信息系统]