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Decode-and-forward relay beamforming for secrecy with imperfect CSI and multiple eavesdroppers

Vishwakarma, Sanjay and Chockalingam, A (2012) Decode-and-forward relay beamforming for secrecy with imperfect CSI and multiple eavesdroppers. In: 2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 17-20 June 2012, Cesme, Turkey, pp. 439-443.

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Official URL: http://dx.doi.org/10.1109/SPAWC.2012.6292945

Abstract

In this paper, we evaluate secrecy rates in cooperative relay beamforming in the presence of imperfect channel state information (CSI) and multiple eavesdroppers. A source-destination pair aided by.. out of.. relays, 1 <= k <= M, using decode-and-forward relay beamforming is considered. We compute the worst case secrecy rate with imperfect CSI in the presence of multiple eavesdroppers, where the number of eavesdroppers can be more than the number of relays. We solve the optimization problem for all possible relay combinations to find the secrecy rate and optimum source and relay weights subject to a total power constraint. We relax the rank-1 constraint on the complex semi-definite relay weight matrix and use S-procedure to reformulate the optimization problem that can be solved using convex semi-definite programming.

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to IEEE.
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Depositing User: Francis Jayakanth
Date Deposited: 16 Aug 2013 09:51
Last Modified: 16 Aug 2013 09:51
URI: http://eprints.iisc.ac.in/id/eprint/47011

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