Title :
A partially adaptive CDMA interference canceller for multipath channels
Author :
Lee, Ta-Sung ; Tsai, Teng-Cheng
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
An adaptive receiver with enhanced interference rejection is proposed for CDMA communications over multipath channels. The design of the receiver involves a two-stage procedure. First, an adaptive correlator bank is constructed in the form of generalized sidelobe canceller (GSC) to suppress strong interference. To reduce complexity, the partially adaptive implementation is incorporated in the design of a GSC blocking matrix. Next, a maximum ratio combining of the correlator outputs is performed to constructively collect the multipath energy. Since strong MAI has then removed, channel estimation can be done accurately, leading to improved performance compared to the conventional RAKE receiver
Keywords :
adaptive signal processing; cellular radio; code division multiple access; correlators; fading channels; interference suppression; matrix algebra; multipath channels; multiuser channels; radio receivers; radiofrequency interference; CDMA communications; GSC blocking matrix; RAKE receiver; adaptive correlator bank; adaptive receiver; cellular radio; channel estimation; correlator outputs; generalized sidelobe canceller; interference rejection; interference suppression; maximum ratio combining; multipath channels; multiuser interference; partially adaptive CDMA interference canceller; performance; receiver design; Additive white noise; Correlators; Delay; Fingers; Interference cancellation; Multiaccess communication; Multipath channels; RAKE receivers; Signal processing; Vectors;
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.2000.851258
