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Optimal Cooperative Jamming to Enhance Physical Layer Security Using Relays

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3 Author(s)
Gan Zheng ; Interdiscipl. Centre for Security, Univ. of Luxembourg, Luxembourg City, Luxembourg ; Li-Chia Choo ; Kai-Kit Wong

This correspondence studies cooperative jamming (CJ) to increase the physical layer security of a wiretap fading channel via distributed relays. We first provide the feasible conditions on the positiveness of the secrecy rate and then show that the optimization problem can be solved using a combination of convex optimization and a one-dimensional search. Distributed implementation to realize the CJ solution and extension to deal with per group relays' power constraints are discussed.

Published in:

Signal Processing, IEEE Transactions on  (Volume:59 ,  Issue: 3 )