Natural gradient based blind multiuser detection

Author

Murillo-Fuentes, J.J. ; Gonzalez-Serrano, Francisco-Javier ; Ramos, J. ; Caamaño, A.J.

Author_Institution

Univ. Carlos III, Madrid, Spain

Volume

3

fYear

2002

fDate

15-18 Sept. 2002

Firstpage

1186

Abstract

In this paper, novel structures for dynamic removal of multiuser interference are proposed. The natural gradient (NG) is used either to compute whitening matrices in linear blind minimum MSE or to develop new structures. As a result, we propose a family of centralized and non-centralized multiuser detectors (MUDs). The NG provides the MUDs with the equivariant and superfficiency properties, making them near-far resistant by construction and their convergence optimal. Moreover, the complexity of these structures is significantly reduced. These novel solutions are successfully applied to the multiuser synchronous CDMA channel.

Keywords

code division multiple access; gradient methods; interference suppression; matrix algebra; mean square error methods; multiuser detection; radiofrequency interference; spread spectrum communication; centralized multiuser detectors; code division multiple access; detector complexity; linear blind minimum MSE; multiuser interference removal; multiuser synchronous CDMA channel; natural gradient based blind multiuser detection; near-far resistant detectors; noncentralized multiuser detectors; optimal convergence; spread spectrum communication; superfficiency properties; whitening matrices; Code division multiplexing; Detectors; Interference; Matrix decomposition; Mean square error methods; Multiaccess communication; Multiuser detection; Noise robustness; Signal processing; Signal processing algorithms;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on

Print_ISBN

0-7803-7589-0

Type

conf

DOI

10.1109/PIMRC.2002.1045215

Filename

1045215