Achievable secrecy sum-rate in a fading MAC-WT with power control and without CSI of eavesdropper

Shah, Shahid M and Kumar, Vireshwar and Sharma, Vinod (2012) Achievable secrecy sum-rate in a fading MAC-WT with power control and without CSI of eavesdropper. In: 2012 International Conference on Signal Processing and Communications (SPCOM), 22-25 July 2012, Bangalore.

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Abstract

We consider a two user fading Multiple Access Channel with a wire-tapper (MAC-WT) where the transmitter has the channel state information (CSI) to the intended receiver but not to the eavesdropper (eve). We provide an achievable secrecy sum-rate with optimal power control. We next provide a secrecy sum-rate with optimal power control and cooperative jamming (CJ). We then study an achievable secrecy sum rate by employing an ON/OFF power control scheme which is more easily computable. We also employ CJ over this power control scheme. Results show that CJ boosts the secrecy sum-rate significantly even if we do not know the CSI of the eve's channel. At high SNR, the secrecy sum-rate (with CJ) without CSI of the eve exceeds the secrecy sum-rate (without CJ) with full CSI of the eve.

Item Type:	Conference Paper
Publisher:	IEEE
Additional Information:	Copyright of this article belongs to IEEE.
Keywords:	Channel State Information; Cooperative jamming; Fading Channel; Multiple Access Channel; Secrecy Sum-Rate; Wire-Tap Channel
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	18 Dec 2013 09:54
Last Modified:	18 Dec 2013 09:54
URI:	http://eprints.iisc.ac.in/id/eprint/48016

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