Blind Channel Equalization in Downlink MC-CDMA Systems Exploiting Guard Interval Redundancy and Excess Codes

Author

Djebbar, A.B. ; Abed-Meraim, K. ; Djebbari, A. ; Rouvaen, J.M.

Author_Institution

Dept. of OAE, UVHC, Valenciennes

fYear

2006

fDate

2-5 July 2006

Firstpage

1

Lastpage

5

Abstract

This paper introduces a new blind time domain equalization (TEQ) technique for downlink MC-CDMA systems operating in multipath fading channels. This equalization exploits the guard interval redundancy (GI) together with the excess codes (EC). Indeed, since in CDMA-based wireless systems, the number of users per cell is significantly less than the spreading factor, a base station can set apart a subset of the codes, the excess codes that will not be used for spreading. A main advantage of this method is its simplicity compared to subspace based techniques and its relative efficiency illustrated by simulation results

Keywords

code division multiple access; codes; equalisers; fading channels; multipath channels; time-domain analysis; CDMA-based wireless systems; blind channel equalization; blind time domain equalization; downlink MC-CDMA systems; excess codes; guard interval redundancy; multipath fading channels; spreading factor; Blind equalizers; Code standards; Downlink; Fading; Laboratories; Multiaccess communication; Multicarrier code division multiple access; OFDM; Signal processing; Telecommunications;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Advances in Wireless Communications, 2006. SPAWC '06. IEEE 7th Workshop on

Conference_Location

Cannes

Print_ISBN

0-7803-9710-X

Electronic_ISBN

0-7803-9711-8

Type

conf

DOI

10.1109/SPAWC.2006.346420

Filename

4153954