The maximum achievable array gain under physical transmit power constraint

In this paper, we derive the maximum achievable array gain of a uniform linear antenna array with isotropic radiators under physical transmit power constraint in three different propagation scenarios: line-of-sight, Rayleigh fading, and constant non-line-of-sight. It turns out that the achievable ar...

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Bibliographic Details
Published in2008 International Symposium on Information Theory and Its Applications pp. 1 - 6
Main Authors Ivrlac, M.T., Nossek, J.A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2008
Subjects
Antenna arrays
Antennas and propagation
Array signal processing
Communication systems
Constraint theory
Information theory
Linear antenna arrays
Rayleigh channels
Receiving antennas
Transmitting antennas
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Summary:In this paper, we derive the maximum achievable array gain of a uniform linear antenna array with isotropic radiators under physical transmit power constraint in three different propagation scenarios: line-of-sight, Rayleigh fading, and constant non-line-of-sight. It turns out that the achievable array gain is larger than is claimed in previously reported results, which do not take the physical transmit power into account. We show that the maximum achievable array gain can increase proportional to the square of the number of transmit antennas for line-of-sight, and also for Rayleigh fading with not too large an angle-spread. In case of some special, constant non-line-of-sight scenarios, the array gain can even grow exponentially with the number of transmit antennas. These result are exciting, for they imply that the potential of multi-antenna communication systems can be much higher than previously reported.
ISBN:9781424420681
1424420687
DOI:10.1109/ISITA.2008.4895614