Title :
A generalized RAKE receiver for DS-CDMA systems
Author :
Bottomley, Gregory E. ; Ottosson, Tony ; Wang, Yi-Pin Eric
Author_Institution :
Ericsson Inc., NC, USA
Abstract :
In this paper, a generalized RAKE receiver for interference suppression and multipath mitigation is proposed. The receiver exploits the fact that time dispersion significantly distorts the interference spectrum from each base station in the downlink of a CDMA system. Compared to the conventional RAKE receiver, this generalized RAKE receiver may have more fingers and has different combining weights. The weights are derived from a maximum likelihood formulation, modeling the intracell interference as colored Gaussian noise. For a wideband CDMA (W-CDMA) system and a realistic mobile radio channel, capacity gains on the order of 100% are shown
Keywords :
Gaussian noise; cellular radio; channel capacity; code division multiple access; fading channels; interference suppression; multipath channels; radio receivers; spread spectrum communication; DS-CDMA systems; W-CDMA system; base station; capacity gain; colored Gaussian noise; combining weights; generalized RAKE receiver; interference suppression; intracell interference; maximum likelihood formulation; mobile radio channel; multipath mitigation; third generation cellular radio system; time dispersion; wideband CDMA; Base stations; Downlink; Fading; Fingers; Gaussian noise; Interference suppression; Multiaccess communication; Multipath channels; RAKE receivers; Wideband;
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
Print_ISBN :
0-7803-5718-3
DOI :
10.1109/VETECS.2000.851263
