A constrained MMSE receiver for DS/CDMA systems in fading channels

Author

Kim, Seong Rag ; Jeong, Young Gyun ; Choi, In-Kyeong

Author_Institution

Adv. Mobile Commun. Dept., ETRI, Taejon, South Korea

Volume

48

Issue

11

fYear

2000

fDate

11/1/2000 12:00:00 AM

Firstpage

1793

Lastpage

1796

Abstract

The convergence problem of minimum mean square-error (MMSE) receivers is discussed, and to overcome the problem, a constrained MMSE receiver is proposed. In addition, we propose the orthogonal decomposition-based least mean square algorithm to implement the constrained MMSE receiver adaptively. Through computer simulations, it is shown that the proposed receiver provides significant performance improvement in the bit-error rate over the conventional matched filter receiver and currently available MMSE receivers.

Keywords

Rayleigh channels; adaptive filters; adaptive signal processing; code division multiple access; convergence of numerical methods; error statistics; filtering theory; land mobile radio; least mean squares methods; multipath channels; multiuser channels; parameter estimation; radio receivers; spread spectrum communication; time-varying channels; AWGN; BER; BPSK; DS/CDMA systems; adaptive constrained MMSE receiver; adaptive filter; asynchronous Rayleigh fading channel; bit-error rate; channel estimation; computer simulations; convergence problem; direct-sequence code-division multiple-access; least mean square algorithm; matched filter receiver; minimum mean square-error; mobile radio; orthogonal decomposition-based LMS algorithm; performance; reverse link; time varying channel; AWGN; Adaptive filters; Additive white noise; Bit error rate; Convergence; Fading; Gaussian noise; Matched filters; Multiaccess communication; Phase estimation;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.886469

Filename

886469