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Robust Power Allocation and Outage Analysis for Secrecy in Independent Parallel Gaussian Channels

Sarma, Siddhartha and Kandhway, Kundan and Kuri, Joy (2016) Robust Power Allocation and Outage Analysis for Secrecy in Independent Parallel Gaussian Channels. In: IEEE WIRELESS COMMUNICATIONS LETTERS, 5 (1). pp. 68-71.

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Official URL: http://dx.doi.org/10.1109/LWC.2015.2497347


This letter studies parallel independent Gaussian channels with uncertain eavesdropper channel state information (CSI). First, we evaluate the probability of zero secrecy rate in this system for 1) given instantaneous channel conditions and 2) a Rayleigh fading scenario. Second, when nonzero secrecy is achievable in the low SNR regime, we aim to solve a robust power allocation problem, which minimizes the outage probability at a target secrecy rate. We bound the outage probability and obtain a linear fractional program that takes into account the uncertainty in eavesdropper CSI while allocating power on the parallel channels. Problem structure is exploited to solve this optimization problem efficiently. We find the proposed scheme effective for uncertain eavesdropper CSI in comparison with conventional power allocation schemes.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
Keywords: Imperfect CSI; outage analysis; physical layer security; robust power allocation
Department/Centre: Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited: 17 Jun 2016 05:14
Last Modified: 17 Jun 2016 05:14
URI: http://eprints.iisc.ac.in/id/eprint/53983

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