Iterative multiuser detection for CDMA with FEC: near-single-user performance

Author

Reed, Mark C. ; Schlegel, Christian B. ; Alexander, Paul D. ; Asenstorfer, John A.

Author_Institution

Technol. Unit, Ascom Systec AG, Maegenwil, Switzerland

Volume

46

Issue

12

fYear

1998

fDate

12/1/1998 12:00:00 AM

Firstpage

1693

Lastpage

1699

Abstract

This paper introduces an iterative multiuser receiver for direct sequence code-division multiple access (DS-CDMA) with forward error control (FEC) coding. The receiver is derived from the maximum a posteriori (MAP) criterion for the joint received signal, but uses only single-user decoders. Iterations of the system are used to improve performance, with dramatic effects. Single-user turbo code decoders are utilized as the FEC system and a complexity study is presented. Simulation results show that the performance approaches single-user performance even for moderate signal-to-noise ratios

Keywords

code division multiple access; computational complexity; decoding; forward error correction; iterative methods; land mobile radio; maximum likelihood detection; radio receivers; spread spectrum communication; turbo codes; DS-CDMA; FEC; MAP criterion; SNR; complexity; direct sequence code-division multiple access; forward error control; iterative multiuser detection; iterative multiuser receiver; joint received signal; maximum a posteriori criterion; mobile communications; near-single-user performance; signal-to-noise ratios; simulation results; single-user decoders; turbo code decoders; Australia; Communication system control; Error correction; Forward error correction; Iterative decoding; Mobile communication; Multiaccess communication; Multiuser detection; Timing; Turbo codes;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.737408

Filename

737408