Optimal 2x2 Antenna Placement for Short-Range Communications

Author

Xumin Pu ; Shihai Shao ; Youxi Tang

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

17

Issue

8

fYear

2013

fDate

Aug-13

Firstpage

1560

Lastpage

1563

Abstract

In this letter, we investigate the optimal antenna placement with path loss and phase differences in terms of the condition number in short-range communications. First, the line-of-sight (LOS) 2×2 multiple-input multiple-output (MIMO) channel matrix with path loss and phase differences is modeled using the spherical-wave model. We then derive the explicit analytical expression and the geometrical pattern for the optimal antenna placement when considering the joint effects of path loss and phase differences, which are compared with the analytical expression and the geometrical pattern when considering only the phase differences. By the optimal antenna placement, the high correlation between the LOS responses can be overcome. Analytical and numerical results show that the path loss differences for short-range communications have a significant impact on the condition number.

Keywords

MIMO communication; antennas; wireless channels; explicit analytical expression; geometrical pattern; line-of-sight MIMO channel matrix; line-of-sight multiple-input multiple-output channel matrix; optimal 2×2 antenna placement; optimal antenna placement; path loss; phase difference; short-range communication; spherical-wave model; Antenna arrays; Directive antennas; Educational institutions; Equations; MIMO; Wireless communication; Line-of-sight (LOS); condition number; short-range communications; spherical-wave model;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2013.070113.130758

Filename

6560080