Linear Precoder Design for Simultaneous Information and Energy Transfer Over Two-User MIMO Interference Channels

Communication strategies that utilize wireless media for simultaneous information and power transfer offer a promising perspective for efficient usage of energy resources. With this motivation, we focus on the design of optimal linear precoders for interference channels utilizing such strategies. We...

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Bibliographic Details
Published in:IEEE transactions on wireless communications Vol. 14; no. 10; pp. 5836 - 5847
Main Authors: Ozcelikkale, Ayca, Duman, Tolga M.
Format: Journal Article
Language:English
Published: New York IEEE 01.10.2015
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Antennas
Channels
energy harvesting
Energy transfer
Interference
interference channel
Interference channels
Linear programming
Mean square errors
Minimization
minimum mean-square error (MMSE)
multi-terminal
Optimization
quality-of-service
Receivers
signal-to-noise ratio (SNR)
simultaneous wireless information and power transfer (SWIPT)
Strategy
Transmitters
Wireless communication
wireless energy transfer
wireless power transfer
linear precoding
energy harvesting
interference
MMSE
Wireless power transfer
simultaneous wireless information and power transfer (SWIPT)
ISSN:1536-1276, 1558-2248, 1558-2248
Online Access:Get full text
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Summary:Communication strategies that utilize wireless media for simultaneous information and power transfer offer a promising perspective for efficient usage of energy resources. With this motivation, we focus on the design of optimal linear precoders for interference channels utilizing such strategies. We formulate the problem of minimizing the total minimum mean-square error while keeping the energy harvested at the energy receivers above given levels. Our framework leads to a non-convex problem formulation. For point-to-point multiple-input multiple-output channels, we provide a characterization of the optimal solutions under a constraint on the number of transmit antennas. For the general interference scenario, we propose two numerical approaches, one for the single antenna information receivers case, and the other for the general case. We also investigate a hybrid signalling scheme, where the transmitter sends a superposition of two signals: a deterministic signal optimized for energy transfer and an information carrying signal optimized for information and energy transfer. It is illustrated that if hybrid signalling is not incorporated into the transmission scheme, interference can be detrimental to the system performance when the number of antennas at the receivers is low.
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ISSN:1536-1276
1558-2248
1558-2248
DOI:10.1109/TWC.2015.2443099