Performance of a subspace based semi-blind technique in the UMTS TDD mode context

Author

Lasaulce, Samson ; Loubaton, Philippe ; Moulines, Eric

Author_Institution

Centre de Recherche de Motorola, Gif-sur-Yvette, France

Volume

5

fYear

2000

fDate

2000

Firstpage

2481

Abstract

We study the performance of a semi-blind subspace channel estimate in the particular context of the uplink of the UMTS time division duplexing (TDD) mode. The TDD mode of the third generation system UMTS is a multiuser DS-CDMA scheme of maximal spreading factor N=16. In the uplink, each slot corresponds to 2560 chips and the channel estimation is classically achieved by using a 512 training chips midamble. In this well defined context, we study the improvements (in terms of bit error rate) provided by a semi-blind channel estimation technique introduced in the context of the single user system of Gorokhov and Loubaton (see Proc. ICASSP, p.3905-3908, 1997) and studied in detail by Buchoux, Moulines, Cappe and Gorokhov (see SPAWC, 1999)

Keywords

code division multiple access; error statistics; land mobile radio; multiuser channels; parameter estimation; radio links; spread spectrum communication; BER; UMTS TDD mode; bit error rate; maximal spreading factor; multiuser DS-CDMA; performance; semi-blind channel estimation; semi-blind subspace channel estimate; single user system; subspace based semi-blind technique; third generation system; time division duplexing; training chips midamble; uplink; 3G mobile communication; Bit error rate; Channel estimation; Computational complexity; Context; Cost function; Maximum likelihood detection; Maximum likelihood estimation; Mean square error methods; Multiaccess communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2000. ICASSP '00. Proceedings. 2000 IEEE International Conference on

Conference_Location

Istanbul

ISSN

1520-6149

Print_ISBN

0-7803-6293-4

Type

conf

DOI

10.1109/ICASSP.2000.860940

Filename

860940