Noncoherent multiuser detection of DS-CDMA over multipath fading channels

被引：0

作者：

Wu, SH ^{[1
]}

Mitra, U ^{[1
]}

Kuo, CCJ ^{[1
]}

机构：

[1] Univ So Calif, Dept Elect Engn, Los Angeles, CA 90089 USA

来源：

2004 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-7 | 2004年

关键词：

D O I：

10.1109/ICC.2004.1312987

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

The problem of joint channel estimation and multiple access interference suppression for an asynchronous code-division multiple-access system is studied. A low-complexity sliding-window scheme is proposed for channel tracking based on the expectation maximization (EM) algorithm and a noncoherent maximum a posteriori probability (MAP) multi-user detector. By exploiting features of discrete random phase ambiguities of channel estimates using the EM algorithm, the proposed scheme can track channel phase even if the channel is in a deep fade. In conjunction with iterative soft interference cancellation, the proposed detector can achieve near single user system performance with polynomial complexity in the number of users.

引用

页码：2525 / 2529

页数：5

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