Precoder and Capacity Expressions for Optimal Two-User MIMO Transmission with Per-Antenna Power Constraints

Author

Park, Jonghyun ; Sung, Wonjin ; Duman, Tolga M.

Author_Institution

Dept. of Electron. Eng., Sogang Univ., Seoul, South Korea

Volume

14

Issue

11

fYear

2010

fDate

11/1/2010 12:00:00 AM

Firstpage

996

Lastpage

998

Abstract

In this letter, multiuser multiple-input multiple-output (MIMO) precoding which achieves the Gaussian broadcast channel (GBC) capacity under the per-antenna power constraint (PAPC) is investigated. In particular, closed-form expressions for both the MIMO precoder and the corresponding sum capacity are presented for the two-user case. We show that the result can also be utilized to provide the two-user capacity expression under the total power constraint (TPC) of transmit antennas.

Keywords

Gaussian channels; MIMO communication; precoding; transmitting antennas; Gaussian broadcast channel capacity; MIMO precoder; multiuser multiple-input multiple-output precoding; optimal two-user MIMO transmission; per-antenna power constraint; total power constraint; transmit antenna; two-user capacity expression; Covariance matrix; Downlink; Interference; MIMO; Signal to noise ratio; Transmitting antennas; Broadcast channel; multiuser MIMO; per-antenna power constraint; precoder; sum capacity;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2010.100410.101473

Filename

5599950