Adaptive maximum SINR RAKE filtering for DS-CDMA multipath fading channels

Author

Kansal, Amit ; Batalama, Stella N. ; Pados, Dimitris A.

Author_Institution

Dept. of Electr. Eng., State Univ. of New York, Buffalo, NY, USA

Volume

16

Issue

9

fYear

1998

fDate

12/1/1998 12:00:00 AM

Firstpage

1765

Lastpage

1773

Abstract

The conventional signature-matched RAKE processor for multipath direct-sequence code division multiple access channels is viewed as a regular linear tap-weight filter of length equal to the sum of the system processing gain and the user channel memory. In this paper, performance improvements are sought in the context of adaptive filtering under maximum signal-to-interference-plus-noise-ratio criteria. The minimum-variance-distortionless-response RAKE (RAKE-MVDR) filter and the lower complexity scalar optimized auxiliary-vector RAKE (RAKE-AUX) filter are developed. Bit error rate (BER) comparisons with the conventional RAKE signature-matched filter are carried out for training sets of reasonably small size, perfectly known, and mismatched/estimated channel coefficients, and extreme near-far system configurations

Keywords

adaptive filters; code division multiple access; error statistics; fading channels; filtering theory; interference suppression; intersymbol interference; multipath channels; multiuser channels; radio receivers; spread spectrum communication; BER; DS-CDMA multipath fading channels; ISI; RAKE-AUX filter; RAKE-MVDR filter; adaptive maximum SINR RAKE filtering; bit error rate; direct-sequence code division multiple access channels; filter length; interference suppression; linear tap-weight filter; minimum-variance-distortionless-response RAKE; mismatched/estimated channel coefficients; near-far system configurations; performance; scalar optimized auxiliary-vector RAKE; signal-to-interference-plus-noise-ratio; signature-matched RAKE processor; signature-matched filter; system processing gain; training sets; user channel memory; Adaptive filters; Bit error rate; Delay; Fading; Filtering; Frequency; Multiaccess communication; Nonlinear filters; Rayleigh channels; Signal to noise ratio;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.737645

Filename

737645