Performance of iterative multiuser receiver for turbo-coded DS-CDMA

Author

Vu, Huy G. ; Rajatheva, R.M.A.P. ; Fernando, W.A.C.

Author_Institution

Dept. of Electr. Eng., Saskatchewan Univ., Sask., Canada

Volume

3

fYear

2003

Firstpage

1610

Abstract

In this paper, a low complexity iterative multiuser receiver is analyzed for a turbo-coded CDMA system. The receiver includes a soft multiuser detector and the decoders for users. The simulation considers an uplink asynchronous transmission over a correlated frequency selective fading channel. The results obtained show that the performance of the receiver approaches the single user performance after only two iterations. Compared with the two-stages/decoder scheme, the performance of iterative multiuser receivers is improved significantly. This improvement illustrates the effect of combined decoding and interference cancellation instead of the separate approach. However, this gain is the trade-off for the complexity of a turbo decoder.

Keywords

code division multiple access; fading channels; interference suppression; iterative decoding; multiuser detection; radio receivers; radiofrequency interference; spread spectrum communication; turbo codes; combined decoding; correlated frequency selective fading channel; direct sequence code division multiple access; interference cancellation; iterations; iterative multiuser receiver; soft multiuser detector; turbo decoder; turbo-coded DS-CDMA; uplink asynchronous transmission; Detectors; Fading; Iterative algorithms; Iterative decoding; Iterative methods; Multiaccess communication; Multiple access interference; Multiuser detection; Telecommunications; Turbo codes;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual

ISSN

1090-3038

Print_ISBN

0-7803-7757-5

Type

conf

DOI

10.1109/VETECS.2003.1207094

Filename

1207094