DMCA
AN ORTHOGONAL PROJECTION BASED BLIND BEAMFORMER FOR DS-CDMA SYSTEMS
BibTeX
@MISC{Chen_anorthogonal,
author = {Jianshu Chen and Jian Wang and Pengyu Zhang and Jian Yuan and Xiuming Shan},
title = {AN ORTHOGONAL PROJECTION BASED BLIND BEAMFORMER FOR DS-CDMA SYSTEMS},
year = {}
}
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Abstract
Conventional blind beamformers in DS-CDMA systems gen-erally suffer from either unreliable convergence rate or sig-nal cancellation in practical signal environment. In this pa-per, we propose a novel orthogonal projection scheme to ex-tract spatial interference structure for the blind beamformer, which requires neither the direction of the desired signal nor the array geometry information. Exploiting more signal-free interference samples makes the convergence of the beam-former fast and independent of the desired signal strength. Simulation results demonstrate its better interference sup-pression ability than the pre- and post- correlation (PAPC) scheme and the filter pair (FP) scheme. Furthermore, the proposed recursive algorithm can null the newly entering interferers within a few symbols, making it suitable for dy-namic multiple access channels. 1.
Keyphrases
blind beamformer desired signal array geometry information ds-cdma system beam-former fast practical signal environment novel orthogonal projection scheme signal-free interference sample dy-namic multiple access channel recursive algorithm post correlation desired signal strength sig-nal cancellation conventional blind beamformers filter pair interference sup-pression ability unreliable convergence rate ex-tract spatial interference structure simulation result
