A linear receiver for coded multiuser CDMA

Author

Alexander, Paul D. ; Rasmussen, Lars K. ; Schlegel, C.B.

Author_Institution

Mobile Commun. Res. Centre, Univ. of South Australia, SA, Australia

Volume

45

Issue

5

fYear

1997

fDate

5/1/1997 12:00:00 AM

Firstpage

605

Lastpage

610

Abstract

We consider a CDMA system with error-control coding. Optimal joint decoding is prohibitively complex. Instead, we propose a sequential approach for handling multiple-access interference and error-control decoding. Error-control decoding is implemented via single-user soft-input decoders utilizing metrics generated by linear algebraic multiuser metric generators. The decorrelator, and a new scheme termed the projection receiver, are utilized as metric generators. For a synchronous system, the coded performance of the projection receiver metric is shown to be superior to the decorrelator even though they are equally complex. Also, the theoretical degradation relative to the single user bound is derived

Keywords

code division multiple access; error correction codes; radio receivers; radiofrequency interference; sequential decoding; spread spectrum communication; telecommunication channels; CDMA system; coded multiuser CDMA; coded performance; decorrelator; error control coding; error control decoding; linear algebraic multiuser metric generators; linear receiver; multiple access interference; projection receiver; sequential approach; single user bound; single user soft input decoders; spreading code based systems; synchronous system; Australia; Convolutional codes; Decoding; Decorrelation; Degradation; Helium; Information theory; Mobile communication; Multiaccess communication; Multiple access interference;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.592562

Filename

592562