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Exploring green interference power for wireless information and energy transfer in the MISO downlink

Zheng, Gan and Masouros, Christos and Krikidis, Ioannis and Timotheou, Stelios (2015) Exploring green interference power for wireless information and energy transfer in the MISO downlink. In: IEEE International Conference on Communications (ICC), 2015, 8-12 June 2015, London.

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Abstract

In this paper we propose a power-efficient transfer of information and energy, where we exploit the constructive part of wireless interference as a source of green useful signal power. Rather than suppressing interference as in conventional schemes, we take advantage of constructive interference among users, inherent in the downlink, as a source of both useful information and wireless energy. Specifically, we propose a new precoding design that minimizes the transmit power while guaranteeing the quality of service (QoS) and energy harvesting constraints for generic phase shift keying modulated signals. The QoS constraints are modified to accommodate constructive interference. We derive a sub-optimal solution and a local optimum solution to the precoding optimization problem. The proposed precoding reduces the transmit power compared to conventional schemes, by adapting the constraints to accommodate constructive interference as a source of useful signal power. Our simulation results show significant power savings with the proposed data-aided precoding compared to the conventional precoding.

Item Type: Conference or Workshop Item (Paper)
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions: Faculty of Science and Health > Computer Science and Electronic Engineering, School of
Depositing User: Jim Jamieson
Date Deposited: 15 Sep 2015 08:33
Last Modified: 15 Sep 2015 08:33
URI: http://repository.essex.ac.uk/id/eprint/14897

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