Iterative interference cancellation scheme with pilot-aided space-time estimation in DS-CDMA systems

Author

Brunel, Loïc ; Mottier, David

Author_Institution

Mitsubishi Electr. ITE, Rennes, France

Volume

1

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

197

Abstract

Iterative multiuser interference cancellation schemes for direct sequence code division multiple access systems exhibit good performance results for a reasonable complexity. We study an efficient iterative scheme, combining interference cancellation, soft input soft output decoding and beamforming. To deal with unknown channels, we add a pilot-aided space-time channel estimation in each iteration. The iterative structure has two advantages: the observation signal used for estimation contains less interference from one iteration to the following and soft estimates of coded bits are available for data-aided estimation.

Keywords

code division multiple access; decoding; interference suppression; iterative methods; land mobile radio; multiuser channels; parameter estimation; radiofrequency interference; spread spectrum communication; DS-CDMA systems; SISO decoding; UMTS; beamforming; data-aided estimation; direct sequence code division multiple access systems; iterative interference cancellation; iterative structure; observation signal; pilot-aided space-time channel estimation; pilot-aided space-time estimation; soft input soft output decoding; third generation Universal Mobile Telecommunication System; 3G mobile communication; Array signal processing; Channel estimation; Convolutional codes; Direct-sequence code-division multiple access; Frequency conversion; Interference cancellation; Iterative decoding; Multiaccess communication; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th

ISSN

1090-3038

Print_ISBN

0-7803-7005-8

Type

conf

DOI

10.1109/VTC.2001.956585

Filename

956585