Performance Analysis of Optimum Zero-Forcing Beamforming with Greedy User Selection

Author

Ozyurt, Serdar ; Torlak, Murat

Author_Institution

Electr. Eng. Dept., Univ. of Texas at Dallas, Richardson, TX, USA

Volume

16

Issue

4

fYear

2012

fDate

4/1/2012 12:00:00 AM

Firstpage

446

Lastpage

449

Abstract

In this letter, an exact performance analysis is presented on the sum rate of zero-forcing beamforming with a greedy user selection algorithm in a downlink system. Adopting water-filling power allocation, we derive a compact form for the joint probability density function of the scheduled users´ squared subchannel gains when a transmitter with multiple antennas sends information to at most two scheduled users with each having a single antenna. The analysis is verified by numerical results.

Keywords

antennas; array signal processing; greedy algorithms; numerical analysis; downlink system; greedy user selection algorithm; joint probability density function; multiple antennas; optimum zero-forcing beamforming; performance analysis; scheduled user squared subchannel gains; single antenna; water-filling power allocation; Algorithm design and analysis; Array signal processing; Joints; Performance analysis; Resource management; Transmitting antennas; Vectors; Zero-forcing beamforming; sum rate; user selection; water-filling power allocation;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2012.022112.112036

Filename

6156503