Adaptive weighted least squares CDMA multiuser detection

Author

Borah, Deva E. ; Rapajic, Predrag B.

Author_Institution

Klipsch Sch. of Electron. & Comput. Eng., New Mexico State Univ., Las Cruces, NM, USA

Volume

1

fYear

2000

fDate

2000

Firstpage

92

Abstract

Adaptive optimal CDMA multiuser detection can be performed by using a bank of MMSE filters followed by a Viterbi detector. Several characteristics of this receiver structure are investigated. It is shown that this receiver can successfully suppress narrow band interference (NBI). The effect of the MMSE filter length on MSE is investigated and it is shown that the MMSE filter length needs to be only a few symbols long. The complexity/performance tradeoff capability of the receiver is studied. It is observed that this receiver, at one end, becomes the linear MMSE receiver with lowest complexity and, at the other end, it becomes the maximum likelihood (ML) receiver with highest complexity

Keywords

adaptive signal detection; cellular radio; channel bank filters; code division multiple access; computational complexity; filtering theory; interference suppression; least mean squares methods; maximum likelihood detection; multiuser channels; radio receivers; radiofrequency interference; spread spectrum communication; DS-CDMA; MMSE filter bank; MMSE filter length; Viterbi detector; adaptive optimal CDMA multiuser detection; adaptive weighted least squares; complexity; complexity/performance tradeoff; linear MMSE receiver; maximum likelihood receiver; multicellular CDMA system; narrow band interference suppression; Adaptive filters; Detectors; Filter bank; Interference suppression; Least squares methods; Maximum likelihood detection; Multiaccess communication; Multiuser detection; Narrowband; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st

Conference_Location

Tokyo

ISSN

1090-3038

Print_ISBN

0-7803-5718-3

Type

conf

DOI

10.1109/VETECS.2000.851424

Filename

851424