Bi-Directional Use of Spatial Resources and Effects of Spatial Correlation

Author

Ju, Hyungsik ; Shang, Xiaohu ; Poor, H. Vincent ; Hong, Daesik

Author_Institution

Yonsei Univ., Seoul, South Korea

Volume

10

Issue

10

fYear

2011

fDate

10/1/2011 12:00:00 AM

Firstpage

3368

Lastpage

3379

Abstract

In multiple antenna systems, spatial fading correlation causes a significant degradation in performance. In this work, a method for reducing the sensitivity to spatial fading correlation through the bi-directional use of spatial resources is investigated. Firstly, the concept of bi-directional use of spatial resources is introduced and the fading characteristics of the proposed bi-directional multiple-input multiple-output (B-MIMO) system are investigated. The achievable rates of the B-MIMO system are then investigated and compared with those of conventional MIMO systems for beamforming and full rank transmission. Based on those results, conditions needed for the B-MIMO system to demonstrate a larger average achievable rate are evaluated. B-MIMO systems are found to efficiently reduce the sensitivity to spatial fading correlation, while supporting comparable achievable rates in spatially white environments.

Keywords

MIMO communication; antenna arrays; array signal processing; correlation methods; fading channels; B- MIMO system; average achievable rate; beamforming; bidirectional multiple-input multiple-output system; bidirectional spatial resource; full rank transmission; multiple antenna system; spatial fading correlation; Bidirectional control; Correlation; Covariance matrix; Fading channels; MIMO; Receiving antennas; Multiple antennas; achievable rate; fading correlation; two-way communication;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2011.081011.101955

Filename

5995303