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Interference Suppression Consisting of Pre-Distortion Filtering and Selective Transmit Diversity

Silva, M. ; Correia, A. ; Dinis, R.

Wireless Personal Communications Vol. 47, Nº 2, pp. 9 - 99, October, 2008.

ISSN (print): 1572-834X
ISSN (online): 0929-6212

Journal Impact Factor: 0,653 (in 2014)

Digital Object Identifier: 10.1007/s11277-008-9456-7

In this paper we present and evaluate a pre-distortion scheme for the downlink of Wideband – Code Division Multiple Access (W-CDMA) systems considering a Rake in the receiver in order to exploit multipath diversity. Its performance is compared with schemes without the pre-distortion at the Base Station (BS), and combined with a Transmit Diversity (TD) scheme to improve the performance by exploiting spatial diversity.
It is shown that the proposed pre-distortion scheme allows receivers (Mobile Stations) with very low complexity, contrarily to the case where a post-processing Multi-User Detector (MUD) approach is adopted to improve the performance. Therefore, the proposed pre-distortion scheme can be seen as an alternative to post-processing schemes.