Title :
Adaptive multi-stage parallel interference cancellation receiver for multi-rate DS-CDMA system
Author :
Han, Seung Hee ; Lee, Jae Hong
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., South Korea
fDate :
6/23/1905 12:00:00 AM
Abstract :
An adaptive multi-stage parallel interference cancellation (PIC) receiver is considered for a multi-rate DS-CDMA system. In each stage of the adaptive multi-stage PIC receiver, multiple access interference (MAI) estimates are obtained using the sub-bit estimates from the previous stage and the adaptive weights for the sub-bit estimates. The adaptive weights are obtained by minimizing the mean squared error between the received signal and its estimate through a least mean square (LMS) algorithm. It is shown that the adaptive multi-stage PIC receiver achieves smaller BER than the matched filter receiver, multi-stage PIC receiver, and multi-stage partial PIC receiver for the multi-rate DS-CDMA system in a Rayleigh fading channel
Keywords :
Rayleigh channels; adaptive estimation; code division multiple access; error statistics; interference suppression; least mean squares methods; parameter estimation; radio receivers; radiofrequency interference; spread spectrum communication; BER; LMS algorithm; MAI estimation; Rayleigh fading channel; adaptive multi-stage receiver; adaptive weights; least mean square algorithm; matched filter receiver; mean squared error; multi-rate DS-CDMA system; multiple access interference; parallel interference cancellation; Bit error rate; Degradation; Detectors; Fading; Interference cancellation; Least squares approximation; Matched filters; Multiaccess communication; Multiple access interference; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-7005-8
DOI :
10.1109/VTC.2001.956838
