Reduced complexity turbo detection for coded DS-CDMA systems employing BPSK modulations

Author

Ouameur, Messaoud Ahmed ; Massicotte, Daniel

Author_Institution

Dept. of Electr. & Comput. Eng., Quebec Univ., Trois-Rivieres, Que., Canada

Volume

3

fYear

2005

fDate

18-23 March 2005

Abstract

In this paper, a reduced complexity turbo detection receiver for coded DS-CDMA signals employing the BPSK modulation technique is presented. The new scheme is based on a new family of MMSE filter whose coefficients are thought to be the solution of a (forced) real valued cost function in the bit rather than a complex one as in conventional MMSE receivers. The new receiver provides, on average, 2 dB gain with less number of iterations. Simulation results for performance evaluation are conducted under the most interesting scenarios including asynchronous multipath channels, time varying channels and multirate systems.

Keywords

channel coding; code division multiple access; convolutional codes; iterative decoding; least mean squares methods; multipath channels; multiuser detection; phase shift keying; spread spectrum communication; time-varying channels; BPSK modulation; MMSE filter; SISO channel decoder; asynchronous multipath channels; convolutionally coded DS-CDMA system; iterative decoding; multirate systems; multiuser detector; reduced complexity turbo detection receiver; time varying channels; Binary phase shift keying; Convolution; Convolutional codes; Cost function; Detectors; Filters; Iterative decoding; Modulation coding; Multiaccess communication; Multipath channels;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2005. Proceedings. (ICASSP '05). IEEE International Conference on

ISSN

1520-6149

Print_ISBN

0-7803-8874-7

Type

conf

DOI

10.1109/ICASSP.2005.1415813

Filename

1415813