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

Volume

2

fYear

2000

fDate

2000

Firstpage

917

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st

Conference_Location

Tokyo

ISSN

1090-3038

Print_ISBN

0-7803-5718-3

Type

conf

DOI

10.1109/VETECS.2000.851258

Filename

851258