Low Complexity Non-Iterative Coordinated Beamforming in 2-User Broadcast Channels

Author

Park, Ki Hong ; Ko, Young Chai ; Alouini, Mohamed Slim

Author_Institution

Sch. of Electr. Eng., Korea Univ., Seoul, South Korea

Volume

58

Issue

10

fYear

2010

fDate

10/1/2010 12:00:00 AM

Firstpage

2810

Lastpage

2815

Abstract

We propose a new non-iterative coordinated beamforming scheme to obtain full multiplexing gain in 2-user MIMO systems. In order to find the beamforming and combining matrices, we solve a generalized eigenvector problem and describe how to find generalized eigenvectors according to the Gaussian broadcast channels. Selected simulation results show that the proposed method yields the same sum-rate performance as the iterative coordinated beamforming method, while maintaining lower complexity by non-iterative computation of the beamforming and combining matrices. We also show that the proposed method can easily exploit selective gain by choosing the best combination of generalized eigenvectors.

Keywords

Gaussian channels; MIMO systems; array signal processing; broadcast channels; eigenvalues and eigenfunctions; iterative methods; matrix algebra; multiplexing; Gaussian broadcast channels; MIMO systems; combining matrices; generalized eigenvector problem; iterative coordinated beamforming method; low complexity non-iterative coordinated beamforming; multiplexing gain; Antennas; Array signal processing; Complexity theory; MIMO; Matrix decomposition; Multiplexing; Receivers; Coordinated beamforming; Gaussian broadcast channel; generalized eigenvector problem;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2010.083110.090013

Filename

5567184