Impact of Antenna Geometry on Adaptive Switching in MIMO Channels

Authors:

Ramya Bhagavatula, Antonio Forenza and  Robert W. Heath, Jr.

Reference:

Proc. of the International Symposium on Wireless personal Multimedia Communications, San Diego, CA, Sept. 17-20, 2006.

Abstract:

Adaptive switching between multiple-input multiple-output (MIMO) transmission schemes like diversity and spatial multiplexing yields significantly higher capacity gains over fixed transmission schemes. Previous work has shown the impact of channel correlation and SNR on the switching between different schemes like beamforming and spatial multiplexing. This paper explores the influence of antenna geometry on the switching points between these transmission schemes. Closed-form expressions for the switching points for a two element uniform linear array (ULA) as a function of antenna geometry and channel statistics are derived. The impact of the channel parameters and antenna geometry on the switching points is also shown by simulations. The paper is concluded with a discussion on the impact of varying antenna array configurations on the switching points between beamforming and spatial multiplexing.

This paper is available as a IEEE Xplore .