MIMO Decode-and-Forward Relay Beamforming for Secrecy with Cooperative Jamming

Vishwakarma, Sanjay and Chockalingam, A (2014) MIMO Decode-and-Forward Relay Beamforming for Secrecy with Cooperative Jamming. In: 20th National Conference on Communications (NCC), FEB 28-MAR 02, 2014, Kanpur, INDIA.

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Abstract

In this paper, we consider decode-and-forward (DF) relay beamforming for secrecy with cooperative jamming (CJ) in the presence of multiple eavesdroppers. The communication between a source-destination pair is aided by a multiple-input multiple-output (MIMO) relay. The source has one transmit antenna and the destination and eavesdroppers have one receive antenna each. The source and the MIMO relay are constrained with powers P-S and P-R, respectively. We relax the rank-1 constraint on the signal beamforming matrix and transform the secrecy rate max-min optimization problem to a single maximization problem, which is solved by semidefinite programming techniques. We obtain the optimum source power, signal relay weights, and jamming covariance matrix. We show that the solution of the rank-relaxed optimization problem has rank-1. Numerical results show that CJ can improve the secrecy rate.

Item Type:	Conference Proceedings
Series.:	National Conference on Communications NCC
Publisher:	IEEE
Additional Information:	Copy right for this article belongs to the IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Keywords:	Relay beamforming; decode-and-forward; physical layer security; secrecy rate; cooperative jamming; multiple eavesdroppers; semidefinite programming
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	19 Jul 2015 09:32
Last Modified:	19 Jul 2015 09:32
URI:	http://eprints.iisc.ac.in/id/eprint/51860

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