Title :
Low complexity parameter estimation for the generalized RAKE receiver
Author :
Cairns, Douglas A. ; Bottomley, Gregory E. ; Wang, Y. P Eric
Author_Institution :
Ericsson Res., Research Triangle Park, NC, USA
Abstract :
RAKE reception is commonly used in the downlink of direct-sequence code-division multiple-access (DS-CDMA) cellular systems. However, RAKE receivers suffer performance losses in frequency selective channels due to inter-symbol interference (ISI) and multiple access interference (MAT). Recently, the generalized RAKE (G-RAKE) receiver has emerged as a low complexity technique for downlink interference suppression. We propose simple approaches herein to place fingers and estimate key parameters of the G-RAKE receiver. Simulations show that a G-RAKE receiver utilizing this approach provides significant performance improvement over a conventional RAKE receiver.
Keywords :
3G mobile communication; cellular radio; channel estimation; code division multiple access; interference suppression; intersymbol interference; radio receivers; spread spectrum communication; DS-CDMA cellular system downlink; G-RAKE receiver; ISI; MAI; RAKE reception; channel estimates; channel probing; downlink interference suppression; frequency selective channels; generalized RAKE receiver; inter-symbol interference; interference sampling finger placement; low complexity parameter estimation; multiple access interference; third generation digital cellular systems; Downlink; Fading; Frequency; Intersymbol interference; Multiaccess communication; Multipath channels; Multiple access interference; Parameter estimation; Performance loss; RAKE receivers;
Conference_Titel :
Digital Signal Processing Workshop, 2004 and the 3rd IEEE Signal Processing Education Workshop. 2004 IEEE 11th
Print_ISBN :
0-7803-8434-2
DOI :
10.1109/DSPWS.2004.1437940