A nonlinear M-estimation approach to robust asynchronous multiuser detection in Non-gaussian noise

Pham, DucSon; Zoubir, A.; Brcic, Ramon; Leung, Yee-Hong

doi:10.1109/TSP.2006.889471

117800_A%20nonlinear%20M-estimation%20PID%20117800.pdf (698.9Kb)

Access Status

Open access

Authors

Pham, DucSon

Zoubir, A.

Brcic, Ramon

Leung, Yee-Hong

Date

2007

Type

Journal Article

Metadata

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Citation

Pham, Duc and Zoubir, Abdelhak and Brcic, Ramon and Leung, Yee-hong. 2007. A nonlinear M-estimation approach to robust asynchronous multiuser detection in non-gaussian noise. IEEE Transactions on Signal Processing. 55 (5): pp. 1624-1633.

Source Title

IEEE Transactions on Signal Processing

DOI

10.1109/TSP.2006.889471

ISSN

1053587X

Faculty

School of Electrical Engineering and Computing

Department of Computing

Faculty of Science and Engineering

Remarks

Copyright © 2007 IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.

URI

http://hdl.handle.net/20.500.11937/39931

Collection

Curtin Research Publications

Abstract

A nonlinear M-estimation approach is proposed to solve the multiuser detection problem in asynchronous code-division multiple-access (CDMA) systems where the ambient noise is impulsive and the delays are not known. We treat the unknown delays as nuisance parameters and the transmitted symbols as parameters of interest. We also analyze the asymptotic performance of the proposed estimator and propose suboptimal but computationally efficient procedures for solving the nonlinear optimization function. Simulation results show considerable improvements over the conventional approaches.