2026-04-13T01:26:13Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/1035872025-07-17T03:27:19Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Muñoz Medina, Olga author Fernández Rubio, Juan Antonio author 1998 Multipath distortion and multiple access interference are major limitations for the performance of wireless CDMA systems. In order to overcome both problems, a base-station antenna array RAKE receiver is proposed in this paper. Each one of the main propagation paths is assigned to one of the branches of the RAKE receiver. After removing the spreading sequence from the selected paths, the de-spread signals are used to estimate the spatial signature of the paths and the received power at each one of them. No training signal nor any a priori spatial information is required for the estimation. After estimating the path spatial signatures, an specific weight vector can be computed for each user. In addition to the multipath combination, this weight vector is able to cancel the interference from other users, achieving substantial robustness against fading and near-far effect at the same time. Peer Reviewed Postprint (published version) Àrees temàtiques de la UPC::Enginyeria de la telecomunicació Telecommunication Radiowave propagation Antenna arrays Code division multiple access Digital signatures Multipath channels Multiuser detection Radio receivers Radiofrequency interference Telecomunicació Spatial-temporal processing with restriction of degrees of freedom for CDMA-multiuser detection