DocumentCode :
1821365
Title :
Interference cancellation based multiuser receiver with channel decoding and decision feedback in asynchronous CDMA systems
Author :
Haifeng, Wang ; Lilleberg, Jorma
Author_Institution :
Nokia Mobile Phones, Oulu, Finland
fYear :
1999
fDate :
1999
Firstpage :
462
Abstract :
Due to the poor performance of conventional receivers with multiple access interference and the near-far problem, we propose an interference cancellation based multiuser receiver with channel decoding and decision feedback for asynchronous CDMA systems. The proposed receiver consists of a RAKE receiver, multiuser detector, multiple access interference cancellation, soft-decision channel decoder and decision feedback from the decoder. The conventional and our generalized multistage multiuser detectors are both simulated in the proposed receiver. The simulation results show that the interference cancellation based receiver significantly outperforms the traditional receiver. The performance of our generalized detector without feedback approaches or even exceeds the performance of the conventional multistage detector with feedback. It means that 50% of the implementation complexity can be saved. Furthermore, the processing delay of the interleaving introduced by decision feedback can also be avoided
Keywords :
Rayleigh channels; code division multiple access; computational complexity; decoding; interference suppression; multiuser channels; radio receivers; radiofrequency interference; synchronisation; RAKE receiver; asynchronous CDMA systems; channel decoding; decision feedback; generalized multistage multiuser detector; implementation complexity; interference cancellation based multiuser receiver; multiple access interference; multiple access interference cancellation; multiuser detector; near-far problem; processing delay; soft-decision channel decoder; Decoding; Delay; Detectors; Fading; Feedback; Interference cancellation; Multiaccess communication; Multipath channels; Multiple access interference; RAKE receivers;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Global Telecommunications Conference, 1999. GLOBECOM '99
Conference_Location :
Rio de Janeireo
Print_ISBN :
0-7803-5796-5
Type :
conf
DOI :
10.1109/GLOCOM.1999.831682
Filename :
831682
Link To Document :
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