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The noise background of small aperture sensor array is spatial color noise for underwater sonar detection system. A super-directive beamform in frequency domain (FSD) method is proposed to solve the problem that the array gain of super-directive beamform cannot reach maximum when there exists error in the estimated noise matrix under spatial color noise background. The wideband received data are divided...
This paper studies the secure communication between a multiple-antenna transmitter (Alice) and a single-antenna destination (Bob) in the presence of more than one eavesdroppers (Eves). The optimal beamforming weights and the covariance matrix of artificial noise (AN) are obtained by minimizing the total transmission power of Alice, subject to a target secrecy rate constraint for Bob. We propose a...
In this note, we point out a few problems with the proof for Theorem 1 and Theorem 2 in the above-mentioned paper and give a correct version for the incorrect parts.
In this paper, we propose a solution to resolve link blockage problem in 60 GHz WPANs. Line-of-Sight (LOS) link is easily blocked by a moving person, which is concerned as one of the severe problems in 60 GHz systems. Beamforming is a feasible technique to resolve link blockage by switching the beam path from LOS link to a Non-LOS (NLOS) link. We propose and evaluate two kinds of Beam Switching (BS)...
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