A Space-Time Multi-Carrier CDMA Receiver with Blind Adaptive MAI Suppression

Juinn-Horng DENG
Ta-Sung LEE

IEICE TRANSACTIONS on Communications   Vol.E85-B    No.8    pp.1490-1498
Publication Date: 2002/08/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technology
multicarrier CDMA,  adaptive matched filter,  adaptive beamformer,  RAKE receiver,  

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A space-time (ST) receiver is proposed for multiple access interference (MAI) and narrowband interference (NBI) suppression, and multipath diversity reception in wireless multi-carrier CDMA communications incorporating antenna arrays. The scheme involves three stages. First, an adaptive matched filter is attached to each finger at each antenna to combat the MAI. Second, an adaptive beamformer is constructed for each finger which provides effective reception of the signal of interest (SOI) and suppression of time-varying NBI. Finally, beamformer output data from different fingers are combined to capture the signal multipath components coherently. The proposed ST receiver is shown to perform reliably under strong interference, and outperform the ST MMSE receiver with pilot symbols aided channel estimation.