Subspace-Based Blind Channel Estimation in DS-CDMA Systems with Unknown Wide-Sense Stationary Interference

Author

Zarifi, Keyvan ; Gershman, Alex B.

Author_Institution

Commun. Syst. Group, Darmstadt Technol. Univ.

Volume

4

fYear

2006

fDate

14-19 May 2006

Abstract

A new blind subspace-based channel and signature waveform estimation technique is proposed for DS-CDMA communication systems operating in the presence of unknown wide-sense stationary interference. Unlike the existing algorithms, our technique requires single receive antenna and is applicable to the general case of arbitrary transmitted symbol constellations. Necessary and sufficient conditions for identifiability of the proposed technique are derived. Closed-form expressions for the mean-squared error (MSE) of the estimated channel are obtained and verified by means of simulations

Keywords

channel estimation; code division multiple access; matrix algebra; mean square error methods; radiofrequency interference; receiving antennas; spread spectrum communication; DS-CDMA communication systems; MSE; arbitrary transmitted symbol constellations; direct sequence code division multiple access; mean-squared error; signature waveform estimation technique; single receive antenna; subspace-based blind channel estimation; unknown wide-sense stationary interference; Blind equalizers; Closed-form solution; Covariance matrix; Interference; Multiaccess communication; Multiuser detection; Phase shift keying; Receiving antennas; Signal processing; Sufficient conditions;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on

Conference_Location

Toulouse

ISSN

1520-6149

Print_ISBN

1-4244-0469-X

Type

conf

DOI

10.1109/ICASSP.2006.1660920

Filename

1660920