Impact of imperfect channel estimation on turbo multiuser detection in DS-CDMA systems

Author

Li, Husheng ; Poor, H. Vincent

Author_Institution

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

Volume

1

fYear

2004

fDate

21-25 March 2004

Firstpage

30

Abstract

In practical wireless communications, channel estimation is imperfect due to the effects of noise and interference. This paper analyzes the impact of imperfect channel estimation on a form of turbo multiuser detection based on linear minimum-mean-square-error (MMSE) detection and parallel interference cancellation. In particular, the variance of the noise caused by the channel estimation error is analyzed for full and reduced rank MMSE detectors and parallel interference cancellation in the large system limit.

Keywords

channel estimation; code division multiple access; covariance matrices; eigenstructure assignment; error detection codes; filtering theory; interference suppression; iterative methods; least mean squares methods; multiuser detection; parallel algorithms; radiofrequency interference; spread spectrum communication; turbo codes; DS-CDMA systems; covariance matrix; eigenvalues distribution; frequency selective channels; imperfect channel estimation; iterative methods; minimum-mean-square-error detection; minimum-mean-square-error filtering; parallel interference cancellation; turbo multiuser detection; wireless communications; Analysis of variance; Channel estimation; Detectors; Error analysis; Interference cancellation; Multiaccess communication; Multiuser detection; Noise cancellation; Noise reduction; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2004. WCNC. 2004 IEEE

ISSN

1525-3511

Print_ISBN

0-7803-8344-3

Type

conf

DOI

10.1109/WCNC.2004.1311513

Filename

1311513