Multistage multiuser detection for CDMA with space-time coding

Author

Zhang, Yumin ; Blum, Rick S.

Author_Institution

Dept. of Electron. Eng. & Comput. Sci., Lehigh Univ., Bethlehem, PA, USA

fYear

2000

fDate

2000

Firstpage

1

Lastpage

5

Abstract

The combination of turbo codes and space-time block codes is studied for use in CDMA systems. Each user´s data are first encoded by a turbo code. The turbo coded data are next sent to a space-time block encoder which employs a BPSK constellation. The space-time encoder output symbols are transmitted through the fading channel using multiple antennas. A multistage receiver is proposed using nonlinear MMSE estimation and a parallel interference cancellation scheme. Simulations show that with reasonable levels of multiple access interference (p⩽0.3), near single user performance is achieved. The receiver structure is generalized to decode CDMA signals with space-time convolutional coding and similar performance is observed

Keywords

block codes; channel coding; code division multiple access; convolutional codes; decoding; fading channels; interference suppression; least mean squares methods; multiuser channels; nonlinear estimation; phase shift keying; receivers; signal detection; turbo codes; BPSK constellation; CDMA; channel coding; convolutional coding; decoding; fading channel; multiple access interference; multiple antennas; multistage receiver; multiuser detection; nonlinear MMSE estimation; parallel interference cancellation; performance; simulations; space-time block codes; turbo codes; Binary phase shift keying; Block codes; Decoding; Fading; Interference cancellation; Multiaccess communication; Multiple access interference; Multiuser detection; Transmitting antennas; Turbo codes;

fLanguage

English

Publisher

ieee

Conference_Titel

Statistical Signal and Array Processing, 2000. Proceedings of the Tenth IEEE Workshop on

Conference_Location

Pocono Manor, PA

Print_ISBN

0-7803-5988-7

Type

conf

DOI

10.1109/SSAP.2000.870068

Filename

870068