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