An efficient soft-in-soft-out multiuser detector for synchronous CDMA with error-control coding

Author

Nasiri-Kenari, Masoumeh ; Sylvester, Randal R. ; Rushforth, Craig K.

Author_Institution

Dept. of Electr. Eng., Sharif Univ. of Technol., Tehran, Iran

Volume

47

Issue

3

fYear

1998

fDate

8/1/1998 12:00:00 AM

Firstpage

947

Lastpage

953

Abstract

We consider synchronous code-division multiple-access (CDMA) communications incorporating an error-control code (ECC) for improved performance. We describe a reduced-complexity multiuser sequence detector and develop a simple method for computing reliability values for the bit decisions produced by this detector. This reliability information is used by a soft-input Viterbi algorithm to decode the ECC. We compare the uncoded and coded performance of this reduced-complexity detector to those of certain decision-feedback equalizer (DFE) multiuser detectors. Simulation shows that the reduced-complexity sequence detector works better than the DFE detectors

Keywords

Viterbi decoding; code division multiple access; decision feedback equalisers; error correction codes; reliability; sequences; signal detection; synchronisation; DFE multiuser detectors; Viterbi decoder; bit decisions; code-division multiple-access; coded performance; decision-feedback equalizer; error-control code; error-control coding; multiuser sequence detector; reduced-complexity sequence detector; reliability; simulation; soft-in-soft-out multiuser detector; soft-input Viterbi algorithm; synchronous CDMA; uncoded performance; Cities and towns; Code division multiplexing; Covariance matrix; Decision feedback equalizers; Decorrelation; Detectors; Error correction codes; Interference elimination; Multiaccess communication; Statistics;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/25.704848

Filename

704848