Multiuser decision-feedback receivers for asynchronous CDMA systems over a mismatched flat Rayleigh fading channel

Author

Chen, Tsao-Tsen ; Lehnert, James S.

Author_Institution

Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA

Volume

48

Issue

9

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

1563

Lastpage

1570

Abstract

In this paper, the design of decision-feedback multiuser (DFM) receivers for asynchronous code-division multiple access (CDMA) systems over a mismatched flat Rayleigh fading channel is studied, and tight upper and lower bounds on the pair-wise symbol-error probability, which has been averaged over the channel fading, time delays, and phase angles, are derived for some of the DFM detection schemes. The performance bounds, which are computed by efficient analytic techniques, can serve as reliable references for CDMA system design. It is shown that the proposed system, which takes into account the effect of mismatched fading on the system design, has some gain over the system where the estimation of fading is assumed to be exact

Keywords

Rayleigh channels; code division multiple access; decision feedback equalisers; delays; error statistics; multiuser channels; receivers; signal detection; DFM detection schemes; asynchronous CDMA systems; channel fading; code-division multiple access systems; design; efficient analytic techniques; fading estimation; mismatched fading; mismatched flat Rayleigh fading channel; multiuser decision-feedback receivers; pair-wise symbol-error probability; performance bounds; phase angles; time delays; Design for manufacture; Detectors; Fading; Maximum likelihood decoding; Military computing; Multiaccess communication; Multiuser detection; Rayleigh channels; Spread spectrum communication; System performance;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.870023

Filename

870023