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Robust Transceiver Design for SWIPT DF MIMO Relay Systems With Time-Switching Protocol

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Open access
Authors
Lee, J.B.
Rong, Yue
Gopal, Lenin
Chiong, Choo W.R.
Date
2021
Type
Journal Article

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Lee, J.B. and Rong, Y. and Gopal, L. and Chiong, C.W.R. 2021. Robust Transceiver Design for SWIPT DF MIMO Relay Systems With Time-Switching Protocol. IEEE Systems Journal.
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IEEE Systems Journal
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Faculty
Faculty of Science and Engineering
School
School of Elec Eng, Comp and Math Sci (EECMS)
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Abstract

In this article, we investigate a dual-hop simultaneous wireless information and power transfer decode-and-forward multiple-input and multiple-output relay communication system, in which the relay node harvests energy based on the radio frequency (RF) signal transmitted from the source node through the time-switching (TS) protocol to decode and forward the re-encoded information to the destination node. With the consideration of the channel estimation error, the joint optimization of the TS factor and source and relay precoding matrices is proposed with robustness against the channel state information mismatch to maximize the mutual information (MI) between the source and destination nodes. We derive the optimal structure of the source and relay precoding matrices to simplify the transceiver optimization problem under fixed and flexible power constraints. Numerical examples demonstrate that the proposed algorithms with robustness provide better MI performance compared to the nonrobust algorithm.