A two-stage hybrid approach for CCI/ISI reduction with space-time processing

Author

Liang, Jen-Wei ; Chen, Jiunn-Tsair ; Paulraj, Arogyaswami J.

Author_Institution

Inf. Syst. Lab., Stanford Univ., CA, USA

Volume

1

Issue

6

fYear

1997

Firstpage

163

Lastpage

165

Abstract

We present a hybrid approach for separate cochannel interference (CCI) reduction and intersymbol interference (ISI) equalization in a slow Rayleigh fading channel. In this hybrid approach, a space-time filter is designed to maximize signal-to-interference-plus-noise ratio (SINR) by jointly optimizing the weight vector and the modified channel vector. A Viterbi equalizer then follows to equalize ISI and demodulate data symbols without noise enhancement. We derive an eigenvector solution for the joint optimization of the weight vector and the modified channel vector. Simulation results show good performance even at low carrier-to-interference-ratio (CIR).

Keywords

Rayleigh channels; cochannel interference; eigenvalues and eigenfunctions; equalisers; fading; filtering theory; interference suppression; intersymbol interference; land mobile radio; optimisation; radiofrequency interference; CCI reduction; ISI equalization; SINR maximisation; Viterbi equalizer; carrier-to-interference-ratio; cochannel interference; eigenvector solution; intersymbol interference; joint optimization; mobile communication; modified channel vector; signal-to-interference-plus-noise ratio; simulation results; slow Rayleigh fading channel; space-time filter; two-stage hybrid approach; weight vector optimisation; Design optimization; Equalizers; Fading; Filters; Interchannel interference; Intersymbol interference; Radiofrequency interference; Signal design; Signal to noise ratio; Viterbi algorithm;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/4234.649927

Filename

649927