异步DS-CDMA系统中基于符号级相关阵的DOA估计  

DOA estimation based on symbol-rate correlation matrices in asynchronous DS-CDMA systems

作　　者：王维新[1] 彭岳星[1] 吴镇扬[1] 

机构地区：[1]东南大学无线电工程系,江苏南京210096

出　　处：《通信学报》2004年第3期50-57,共8页Journal on Communications

基　　金：国家"863"计划基金资助项目(2001AA123015)

摘　　要：针对异步DS-CDMA系统多用户环境,本文提出了一种有效的DOA估计算法。首先,将天线阵分为等阵元的两组,并且在符号级构造出不含噪声项的组间相关阵;然后,根据最小二乘准则分离出DOA信息;最后,利用MUSIC算法逐个估计出各路径的DOA。算法具有分辨率高,顽健性强及硬件要求低等优点。仿真实验验证了算法的有效性。This paper presents a DOA estimation algorithm of multipath signals in asynchronous DS-CDMA systems. First, antenna array is divided into two groups with equal elements. And symbol-rate correlation matrices between the groups which have no noise items are constructed sequently. Then, DOA related information is separated from the matrices according to the least squares criteria. Finally, using MUSIC algorithm, each DOAs are resolved serially. The proposed algorithm has the advantages of high resolution, strong robustness and low demand for hardware. Simulation results confirm the effectiveness of the algorithm.

关 键 词：波达方向估计 空时信号处理 智能天线 

分 类 号：TN911.7[电子电信—通信与信息系统]