Asymptotic analysis of improved linear receivers for BPSK-CDMA subject to fading

Author

Tulino, Antonia Maria ; Verdú, Sergio

Author_Institution

Dept. of Electr. Eng., Princeton Univ., NJ, USA

Volume

19

Issue

8

fYear

2001

fDate

8/1/2001 12:00:00 AM

Firstpage

1544

Lastpage

1555

Abstract

In this paper, we design and analyze a new class of linear multiuser detectors, which can be applied when the users employ BPSK modulation and the fading coefficients of the active users are known at the receiver (such as base-station demodulation). The tools of asymptotic distribution of the spectrum of large random matrices are used to show that relative to the classical minimum mean-square-error (MMSE) receiver, the output signal-to-noise ratio (SNR) improves by halving the number of effective interferers and adding 3 dB to the input SNR. We also propose sensible approximations to the proposed linear receivers so as to facilitate their use in CDMA systems that employ long codes

Keywords

cellular radio; code division multiple access; fading channels; matrix algebra; multiuser channels; phase shift keying; radio receivers; radiofrequency interference; spread spectrum communication; 3 dB; BPSK modulation; BPSK-CDMA; SNR; active users; asymptotic analysis; asymptotic distribution; base-station demodulation; fading; interferers; large random matrices; linear multiuser detectors; linear receivers; output signal-to-noise ratio; Binary phase shift keying; Decorrelation; Detectors; Fading; Multiaccess communication; Multiple access interference; Phase modulation; Phase shift keying; Quadrature phase shift keying; Symmetric matrices;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.942516

Filename

942516