Space-time partially adaptive pre-equalizer for high rate CDMA systems using conjugate gradient technique

Gau J. Lin*, Ta-Sung Lee, Chan Choo Tan

*此作品的通信作者

研究成果: Conference article同行評審

摘要

A novel space-time (ST) pre-equalizer is proposed for the downlink of high data rate CDMA systems over frequency-selective multipath channels. We consider the scenario in which multiple transmit antennas are used at the base station (BS) for downlink transmission, followed by a set of adaptive FIR filters to suppress the multiple access interference (MAI) and possible intersymbol interference (ISI). With the MAI and ISI effectively suppressed, each mobile station (MS) would require only a simple matched filter (MF), leading to a "thin" handsets design suitable for next-generation wireless communications. The tap weights of each adaptive FIR filter are determined based on the generalized sidelobe canceller (GSC) technique, and partial adaptivity is incorporated via the conjugate gradient (CG) algorithm for reduced complexity implementation. The proposed ST pre-equalizer is evaluated through simulations, and the results show that it can achieve better performance compared to the pre-RAKE maximum ratio combining (MRC) method.

原文English
文章編號1040550
頁(從 - 到)1916-1920
頁數5
期刊IEEE Vehicular Technology Conference
56
發行號3
DOIs
出版狀態Published - 24 9月 2002
事件56th Vehicular Technology Conference - Vancouver, BC, Canada
持續時間: 24 9月 200228 9月 2002

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