一种新的DS-CDMA系统多径角度时延联合估计方法  

A Novel Approach for Joint Angle and Delay Estimation in DS-CDMA Systems

作　　者：黄晖[1] 廖桂生[1] 张林让[1] 

机构地区：[1]西安电子科技大学雷达信号处理重点实验室,陕西西安710071

出　　处：《电子学报》2002年第3期335-338,共4页Acta Electronica Sinica

基　　金：国家教育部<跨世纪优秀人才培养计划>基金;国家自然科学基金 (No .6980 2 0 0 9)

摘　　要：本文针对DS CDMA系统 ,提出了一种新的期望用户多径信号波达方向和时延联合估计方法 .在匹配滤波器输出中 ,期望用户信号的平方与多址干扰信号的平方具有不同的频谱特性 .对各个频率上的空域相关矩阵进行预处理后 ,本文采用两维unitary ESPRIT算法完成角度时延的闭式估计和自动配对 .本文方法计算量小 ,并且在存在远近效应的情况下 。This paper presents a novel method for jointly estimating the direction of arrival (DOA) and time delay of each multipath of the desired user in a DS CDMA system.The respective spectra of the square of the desired user and MAI components at the matched filter output are different.After pre processing the spatial covariance matrixes at each frequency,we propose the 2D unitary ESPRIT algorithm as our estimator which provides closed form as well as automatically paired DOA and time delay estimates.The approach presented herein can give accurate estimates even under near far conditions at low computation cost.

关 键 词：参数估计 空时处理 码分多址 DS-CDMA系统 多径角度 时延联合估计 

分 类 号：TN929.533[电子电信—通信与信息系统]