A low-complexity space-time RAKE receiver for DS-CDMA communications

被引:13
作者
Ramos, J
Zoltowski, MD
Liu, H
机构
[1] PURDUE UNIV,SCH ELECT ENGN,W LAFAYETTE,IN 47907
[2] UNIV VIRGINIA,DEPT ELECT ENGN,CHARLOTTESVILLE,VA 22903
关键词
array processing; CDMA; RAKE;
D O I
10.1109/97.623044
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
An algorithm is presented for estimating the quantities needed by a space-time RAKE receiver for DS-CDMA to achieve maximum SINR for the desired user, The proposed algorithm, which is applicable in the case of either periodic or aperiodic spreading codes, asymptotically provides the exact time of arrival of each dominant. multipath within a bit period, and the optimum beamformer for extracting each multipath, This is achieved by using cyclostationarity to exploit the difference between the respective spectra of the desired user and each multiuser access interferer at the output of the correlator based on the desired user's code, Estimates of the relative time delay and optimal beamformer for each RAKE huger are used by the space-time RAKE receiver to optimally combine the desired user's multipath while simultaneously canceling strong multiuser access interference. Simulations of a near-far scenario are presented demonstrating the efficacy of the proposed algorithm.
引用
收藏
页码:262 / 265
页数:4
相关论文
共 3 条
[1]   Blind equalization in antenna array CDMA systems [J].
Liu, H ;
Zoltowski, MD .
IEEE TRANSACTIONS ON SIGNAL PROCESSING, 1997, 45 (01) :161-172
[2]  
RAMOS J, P ICASSP 97, P4025
[3]  
ZOLTOWSKI MD, P MILCOM 96, P618