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On the Covariance Matrix and Diversity Performance Evaluation of Compact Multiport Antenna Systems

Papamichael, Vasilis; Karadimas, Petros


Vasilis Papamichael


In this communication, we present a new electromagnetic methodology that determines the covariance matrix of compact multiport antenna (MPA) systems at the early design stage. Further insight into this field is provided, as contrary to existing methodologies, it rigorously relies on the reciprocity principle of MPA systems. Thus, the impact of propagation environment, termination conditions, and MPA radiation characteristics as independent factors affecting performance is physically incorporated. Provided the availability of mathematical expressions for the cumulative distribution function and probability density function of received signal-to-noise ratio (SNR), performance can then be analytically studied via the diversity antenna gain (DAG) in terms of: 1) SNR enhancement at a specific outage probability (OP) level (that is DAG-OP) and 2) average SNR reduction for achieving a specific average bit error rate (BER) (that is DAG-BER). Illustrative examples with performance evaluation of compact MPA systems are presented. The adopted diversity technique is the transmit antenna selection/maximal ratio combining, which is analytically studied employing realistic MPA systems for the first time. Comparisons with existing published results further demonstrate the validity and usefulness of the proposed methodology.

Journal Article Type Article
Acceptance Date Sep 3, 2017
Online Publication Date Sep 19, 2017
Publication Date 2017-11
Deposit Date Jan 12, 2022
Journal IEEE Transactions on Antennas and Propagation
Print ISSN 0018-926X
Electronic ISSN 1558-2221
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 65
Issue 11
Pages 6140-6144
Keywords Antenna diversity, covariance matrix methodology, diversity antenna gain (DAG), multiport antenna (MPA) systems
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