NDLI: On the efficiency of directional antennas in MIMO communication systems

Content Provider	IEEE Xplore Digital Library
Author	Darvishi, O. Abolhassani, B. Rad, H.S.
Copyright Year	2009
Description	Author affiliation: Department of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran (Darvishi, O.; Abolhassani, B.) \|\| Laboratory for Structural NMR Imaging, University of Pennsylvania, Philadelphia, 19104, USA (Rad, H.S.)
Abstract	It is conventionally believed that directional antennas are not as efficient as omnidirectional antennas in MIMO communications since they limit the effective angular spread of the scattering environment. However, it is often neglected that the power gain provided by directional antennas can compensate for the deleterious effect of their limited beamwidth. In this paper, we analyze the efficiency of directional antennas to investigate whether these antennas can improve the capacity of MIMO communication systems versus commonly used omnidirectional antennas. Employing a realistic MIMO channel model, we show that the performance of directional antennas depends on the scattering environment, the signal to noise ratio and the array configuration. Our simulation results suggest that in certain conditions directional antennas can indeed improve the capacity of MIMO systems compared to the capacity achieved by using omnidirectional antennas.
Starting Page	1
Ending Page	5
File Size	226530
Page Count	5
File Format	PDF
ISBN	9781424433810
DOI	10.1109/SARNOF.2009.4850347
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-03-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Directional antennas MIMO Directive antennas Scattering Signal to noise ratio Antennas and propagation Antenna accessories Antenna measurements Magnetic resonance imaging Power system modeling
Content Type	Text
Resource Type	Article

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