Estimation of directions of arrival of multipath signals in CDMA systems

被引：24
|
作者：
Lei, ZD [1 ]
Lim, TJ [1 ]
机构：
[1] Natl Univ Singapore, Ctr Wireless Commun, Singapore 117674, Singapore
来源：
IEEE TRANSACTIONS ON COMMUNICATIONS | 2000年 / 48卷 / 06期
关键词：
CDMA; DOA estimation; intersymbol interference; multipath channel; multiuser channel;
D O I：
10.1109/26.848564
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, an algorithm is proposed for estimating the directions of arrival (DOA's) of multipath signals received from multiple users on the uplink of a code-division multiple-access system. The correlation matrices of the received signal before and after code-matched filtering are used to provide unique estimates even when the number of required DOA's exceeds the number of antenna array elements. This scenario is well known to cause conventional direction-finding algorithms (such as MUSIC) to fail. Both intersymbol interference (ISI) and multiple-access interference (MAI) are modeled exactly, and so the algorithm performs much better than those which model ISI and MAI as Gaussian noise.
引用
收藏
页码：1022 / 1028
页数：7
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