An efficient blind multiuser detection for improper DS/CDMA signals

Author

Yoon, Yonwoo ; Kim, Hyung-Myung

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea

Volume

55

Issue

2

fYear

2006

fDate

3/1/2006 12:00:00 AM

Firstpage

572

Lastpage

582

Abstract

This paper proposes a new linear blind multiuser detection based on widely linear (WL) signal processing. The received signal and its complex conjugate are separately filtered and the results are linearly combined. The WL maximum/minimum (max/min) mean-output-energy (MOE) receiver is derived by applying the modified cost function. It is shown that a performance gain can be attained for the improper direct-sequence code division multiple access (DS/CDMA) signal, due to the additional information contained in pseudocovariance matrix of observations. The adaptive implementation with acceptable complexity is also developed. Computer-simulation results show that a significant performance gain is obtained over the other classical methods.

Keywords

3G mobile communication; code division multiple access; covariance matrices; minimax techniques; multiuser detection; signal processing; spread spectrum communication; DS-CDMA signals; blind multiuser detection; computer simulation; direct-sequence code-division multiple access; maximum-minimum mean-output-energy receiver; modified cost function; pseudocovariance matrix; widely linear signal processing; Cost function; Filtering; Interference suppression; Maximum likelihood estimation; Multiaccess communication; Multiuser detection; Nonlinear filters; Performance gain; Signal processing; Videos; Code division multiple access (CDMA); improper signal; interference suppression; multiuser receiver; widely linear (WL) filter;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/TVT.2005.863359

Filename

1608636