Channel equalization in DS-CDMA downlink communications

Author

Li, Kemin ; Liu, Hui

Author_Institution

Dept. of Electr. Eng., Virginia Univ., Charlottesville, VA, USA

Volume

1

fYear

1999

fDate

24-27 Oct. 1999

Firstpage

80

Abstract

A linear receiver is proposed for downlink DS-CDMA communications over unknown frequency-selective fading channels. The new receiver exploits the fact that all synchronized orthogonal CDMA signals go through the same channel to recover the desired signal with a constrained channel equalizer followed by a despreader. Such a scheme allows the receiver to operate blindly in a time varying environment for both periodic CDMA and aperiodic CDMA systems.

Keywords

adaptive equalisers; code division multiple access; fading channels; land mobile radio; multiuser channels; radio links; radio receivers; spread spectrum communication; synchronisation; DS-CDMA downlink communications; FIR channels; aperiodic CDMA systems; blind equalizer; channel equalization; constrained channel equalizer; despreader; frequency-selective fading channels; linear receiver; periodic CDMA systems; signal recovery; synchronized orthogonal CDMA signals; time varying environment; Data models; Downlink; Equalizers; Fading; Finite impulse response filter; Frequency synchronization; Multiaccess communication; Multiple access interference; RAKE receivers; Time varying systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems, and Computers, 1999. Conference Record of the Thirty-Third Asilomar Conference on

Conference_Location

Pacific Grove, CA, USA

ISSN

1058-6393

Print_ISBN

0-7803-5700-0

Type

conf

DOI

10.1109/ACSSC.1999.832300

Filename

832300