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Worst-Case Robust Beamforming Design for Wireless Powered Multirelay Multiuser Network With a Nonlinear EH Model | IEEE Journals & Magazine | IEEE Xplore

Worst-Case Robust Beamforming Design for Wireless Powered Multirelay Multiuser Network With a Nonlinear EH Model


Abstract:

This paper studies joint source and relay beamforming for a wireless powered downlink multirelay multiuser network. Considering nonlinear energy harvesting and imperfect ...Show More

Abstract:

This paper studies joint source and relay beamforming for a wireless powered downlink multirelay multiuser network. Considering nonlinear energy harvesting and imperfect channel state information, we aim to minimize the total transmit power at the base station by jointly optimizing the source beamforming and the relay beamforming weights under the energy causality constraints at the relays and the signal-to-noise ratio constraints at the users. The formulated problem is highly nonconvex, and thus, it is difficult to solve. To solve the problem, we first transform it into a worst-case optimization, and then, an iterative algorithm is developed to solve this worst-case optimization. Numerical results show the advantage of the proposed robust scheme.
Published in: IEEE Transactions on Vehicular Technology ( Volume: 68, Issue: 3, March 2019)
Page(s): 3038 - 3042
Date of Publication: 30 January 2019

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