An LCMV-based approach for downlink beamforming in FDD systems in presence of angular spread

Author

Zanatta Filho, D. ; Cavalcante, C.C. ; Romano, J.M.T. ; Resende, L.S.

Author_Institution

DSPCom, UNICAMP, Campinas, Brazil

fYear

2002

fDate

3-6 Sept. 2002

Firstpage

1

Lastpage

4

Abstract

An approach based on constrained filtering for downlink beamforming for FDD systems is presented. The impact of the angular spread in the calculation of the beamforming weights is evaluated for such approach, as well as for that based on the maximization of the signal to interference ratio. It is shown that the LCMV-based method leads to an efficient solution with the introduction of eigenvector constraints in the optimization procedure. The simulation results illustrate the good performance of the proposed technique, which presents an acceptable computational complexity and is suitable for adaptive implementation.

Keywords

array signal processing; computational complexity; eigenvalues and eigenfunctions; filtering theory; mobile radio; radiofrequency interference; FDD systems; LCMV-based approach; angular spread; beamforming weight calculation; computational complexity; constrained filtering; downlink beamforming; eigenvector constraints; linearly constrained minimum variance; mobile communications; optimization procedure; signal-to-interference ratio maximization; Abstracts; Array signal processing; Computational complexity; Covariance matrices; Downlink;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Conference, 2002 11th European

Conference_Location

Toulouse

ISSN

2219-5491

Type

conf

Filename

7071980