Downlink transmit beamforming with selective feedback

Author

Nagaraj, Shirish ; Huang, Yih-Fang

Author_Institution

Dept. of Electr. Eng., Notre Dame Univ., IN, USA

Volume

2

fYear

2000

fDate

Oct. 29 2000-Nov. 1 2000

Firstpage

1608

Abstract

We consider a novel scheme to facilitate downlink beamforming over fading channels. A new feedback scheme is proposed, the main features of which being significantly reduced feedback. An adaptive set-membership filtering solution to channel estimation is proposed at the base-station, which, by its very formulation, requires only sparse and selective feedback of information from the mobile. Further, information-theoretic downlink capacity analysis shows that such a beamformer is near optimal in terms of capacity.

Keywords

adaptive estimation; adaptive filters; array signal processing; fading channels; feedback; filtering theory; land mobile radio; radio links; adaptive set-membership filtering; base-station; channel capacity; channel estimation; downlink transmit beamforming; fading channels; information-theoretic downlink capacity; selective feedback; Array signal processing; Baseband; Channel estimation; Channel state information; Degradation; Downlink; Fading; Multiaccess communication; Signal processing; State feedback;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 2000. Conference Record of the Thirty-Fourth Asilomar Conference on

Conference_Location

Pacific Grove, CA, USA

ISSN

1058-6393

Print_ISBN

0-7803-6514-3

Type

conf

DOI

10.1109/ACSSC.2000.911261

Filename

911261