A unified approach to joint adaptive interference cancellation and parameter estimation for CDMA systems in multipath channels

被引：0
|
作者：
de Lamare, Rodrigo C. [1 ,2 ,3 ]
Sampaio-Neto, Raimundo [1 ,2 ,3 ]
Hjorungnes, Are [1 ,2 ,3 ]
机构：
[1] Univ York, Commun Res Grp, Dept Elect, York YO10 5DD, N Yorkshire, England
[2] Pontificia Univ Catolica Rio de Janeiro, CETUC, BR-21941 Rio de Janeiro, Brazil
[3] Univ Oslo, UniK Univ Grad Ctr, N-0316 Oslo, Norway
来源：
2007 IEEE 8TH WORKSHOP ON SIGNAL PROCESSING ADVANCES IN WIRELESS COMMUNICATIONS, VOLS 1 AND 2 | 2007年
关键词：
D O I：
暂无
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：
This paper proposes a unified approach to joint adaptive parameter estimation and interference cancellation (IC) for direct sequence code-division-multiple-access (DS-CDMA) systems in multipath channels. A unified framework is presented in which the IC problem is formulated as an optimization problem with extra degrees of freedom of an IC parameter vector for each stage and user. We propose a joint optimization method for estimating the IC parameter vector, the linear receiver filter front-end, and the channel along with minimum mean squared error (MMSE) expressions for the estimators. Based on the proposed joint optimization approach, we derive low-complexity stochastic gradient (SG) algorithms for estimating the desired parameters. Simulation results for the uplink of a synchronous DS-CDMA system show that the proposed methods significantly outperform the best known IC receivers.
引用
收藏
页码：181 / +
页数：2
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