Joint channel estimation and multiuser detection for multipath fading channels in DS-CDMA systems

Sau-Hsuan Wu*, Urbashi Mitra, C. C. Jay Kuo

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations

Abstract

The problem of joint blind channel estimation and multiple access interference (MAI) suppression for an asynchronous code-division multiple-access (CDMA) system is studied. A low-complexity sliding-window scheme based on the expectation maximization (EM) algorithm is developed for joint blind maximum a posteriori probability (MAP) multi-user detection (MUD) and stochastic maximum likelihood (ML) channel estimation in a dispersive fading channel. With multistage soft interference cancellation, MAI can be efficiently suppressed. Together with an initial value prediction method for algorithm initialization at each window, the proposed scheme can track fading channels on the fly with no phase ambiguities even when channel gains are close to zero.

Original languageEnglish
Pages (from-to)2411-2415
Number of pages5
JournalIEEE International Conference on Communications
Volume4
DOIs
StatePublished - 18 Jul 2003
Event2003 International Conference on Communications (ICC 2003) - Anchorage, AK, United States
Duration: 11 May 200315 May 2003

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