Robust multiuser detection in unknown noise channels

Author

Johansson, Henrik ; Brcich, Ramon ; Zoubir, Abdelhak

Author_Institution

Curtin Univ. of Technol., Perth, WA, Australia

Volume

2

fYear

2002

fDate

17-21 Nov. 2002

Firstpage

1078

Abstract

We propose a robust multiuser detector which combats multiple access interference and noise of unknown distribution in CDMA systems. The detector follows the M-estimation concept of robust statistics, except that the influence function is modelled as a weighted sum of a set of basis functions and is estimated from the observations. Simulations show that performance is improved in impulsive noise compared to conventional and previously presented non-linear schemes.

Keywords

Gaussian noise; code division multiple access; impulse noise; interference suppression; multiuser detection; parameter estimation; radiofrequency interference; spread spectrum communication; statistical analysis; CDMA systems; DS-SS; Gaussian mixture noise; M-estimation concept; basis functions; code division multiple access; direct-sequence spread spectrum; impulsive noise; multiple access interference; noise distribution; nonlinear schemes; robust multiuser detection; robust statistics; simulations; unknown noise channels; weighted sum; AWGN; Additive white noise; Australia; Detectors; Gaussian noise; Multiaccess communication; Multiple access interference; Multiuser detection; Noise robustness; Working environment noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE

Print_ISBN

0-7803-7632-3

Type

conf

DOI

10.1109/GLOCOM.2002.1188362

Filename

1188362