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Lookup NU author(s): Professor Jonathon Chambers
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OAPA In this paper, we investigate transmit beampattern optimization techniques for a multiple-input multiple-output (MIMO) radar in the presence of a legitimate communications receiver and an eavesdropping target. The primary objectives of the radar are to satisfy a certain target detection criterion and to simultaneously communicate safely with a legitimate receiver by maximizing the secrecy rate against the eavesdropping target. Therefore, we consider three optimization problems, namely, target return signal to interference plus noise ratio (SINR) maximization, secrecy rate maximization and transmit power minimization. However, these problems are non-convex due to the non-concavity of the secrecy rate function, which appears in all three optimizations either as the objective function or as a constraint. To solve this issue, we use Taylor series approximation of the non-convex elements through an iterative algorithm, which recasts the problem as a convex problem. Two transmit covariance matrices are designed to detect the target and convey the information safely to the communication receiver. Simulation results are presented to validate the efficiency of the aforementioned optimizations.
Author(s): Deligiannis A, Daniyan A, Lambotharan S, Chambers JA
Publication type: Article
Publication status: Published
Journal: IEEE Transactions on Aerospace and Electronic Systems
Print publication date: 01/10/2018
Online publication date: 28/03/2018
Acceptance date: 26/02/2018
ISSN (print): 0018-9251
ISSN (electronic): 1557-9603
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