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RF Energy Transfer for Cooperative Networks: Data Relaying or Energy Harvesting?

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3 Author(s)
Krikidis, I. ; Dept. of Electr. & Comput. Eng., Univ. of Cyprus, Nicosia, Cyprus ; Timotheou, S. ; Sasaki, S.

This letter deals with a three-node cooperative network where the relay node harvests energy from radio frequency (RF) radiation. The source node is the only available RF generator and introduces a fundamental switching between energy harvesting and data relaying. A greedy switching (GS) policy where the relay node transmits when its residual energy ensures decoding at the destination is investigated. The GS policy is modeled as a Markov chain for a discretized battery; the stationary distribution and the outage probability of the system are derived in closed form expressions. In addition, an optimal switching policy that incorporates a-priori knowledge of the channel coefficients is proposed and solved by a mixed-integer linear programming formulation.

Published in:

Communications Letters, IEEE  (Volume:16 ,  Issue: 11 )

Date of Publication:

November 2012

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