Space-time algorithms for multiuser channel estimation in the downlink of UMTS/TDD

Author

Kopsa, K. ; Artés, H. ; Matz, G. ; Hlawatsch, F.

Author_Institution

Inst. of Commun. & Radio-Frequency Eng., Vienna Technol. Univ., Wien, Austria

Volume

4

fYear

2003

fDate

11-15 May 2003

Firstpage

2406

Abstract

We present space-time methods for channel estimation in the downlink of a UMTS/TDD system. The channels associated to all base stations near the mobile receiver are estimated by a multiuser, multi-antenna technique. We develop a minimum mean-square error (MMSE) channel estimator that incorporates midamble detections/estimation and least-squares channel estimation as preparatory stages. Combination of this MMSE channel estimator with a successive interference cancellation scheme allows to cope with strong co-channel interference. Simulation results indicate the good performance of our space-time channel estimator for various realistic propagation scenarios.

Keywords

3G mobile communication; channel estimation; cochannel interference; interference suppression; least mean squares methods; multiuser channels; radio links; radio receivers; signal detection; space-time adaptive processing; time division multiplexing; UMTS/TDD downlink; base station; cochannel interference; interference cancellation; least-squares channel estimation; midamble detections/estimation; minimum mean-square error; mobile receiver; multiantenna technique; multiuser channel estimation; space-time algorithms; time division duplex; universal mobile telecommunication system; 3G mobile communication; Base stations; Channel estimation; Downlink; Frequency synchronization; Interference cancellation; Multiuser channels; Radio frequency; Signal processing algorithms; Space technology;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2003. ICC '03. IEEE International Conference on

Print_ISBN

0-7803-7802-4

Type

conf

DOI

10.1109/ICC.2003.1204365

Filename

1204365