Vectorial channel estimation for uplink MC-CDMA in beyond 3G wireless systems

Author

Marques, Paulo ; Gameiro, Atilio ; Fernandes, J.

Author_Institution

Inst. de Telecomunicacoes, Aveiro Univ., Portugal

Volume

1

fYear

2003

fDate

7-10 Sept. 2003

Firstpage

984

Abstract

In beyond 3G wireless systems the bandwidth efficiency can be increased with the use of adaptive antenna arrays. This paper focus on a key issue for adaptive antenna arrays, that is, channel parameters estimation including direction-of-arrival (DOA). In order to estimate DOA, the channel frequency responses for the links between the mobile users and each of base station array elements are estimated by pilot-aided minimum mean square error (MMSK) algorithm. This estimator is not sensitive to the channel statistics. Based on frequency response estimatives DOA´s of impinging multipath components to the base station are estimated by a low complex maximum likelihood (ML) approach. Furthermore an uplink burst structure with specifically designed midamble field for multiuser channel estimation in MC-CDMA is proposed. The performance is assessed in terms of channel estimation errors for a MC-CDMA TDD system over fast and slow fading mobile channels.

Keywords

3G mobile communication; adaptive antenna arrays; channel estimation; code division multiple access; direction-of-arrival estimation; fading channels; least mean squares methods; maximum likelihood estimation; multipath channels; radio links; time division multiplexing; adaptive antenna arrays; bandwidth efficiency; base station array elements; beyond 3G wireless systems; channel estimation errors; channel frequency responses; channel statistics; direction-of-arrival; fading mobile channels; minimum mean square error; mobile users; multiuser channel estimation; parameters estimation; uplink MC-CDMA; vectorial channel estimation; Adaptive arrays; Antenna arrays; Bandwidth; Base stations; Channel estimation; Direction of arrival estimation; Directive antennas; Frequency estimation; Maximum likelihood estimation; Multicarrier code division multiple access;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003. 14th IEEE Proceedings on

Print_ISBN

0-7803-7822-9

Type

conf

DOI

10.1109/PIMRC.2003.1264421

Filename

1264421