Secrecy Wireless Information and Power Transfer With MISO Beamforming
Top Cited Papers
- 29 January 2014
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Signal Processing
- Vol. 62 (7), 1850-1863
- https://doi.org/10.1109/tsp.2014.2303422
Abstract
The dual use of radio signal for simultaneous wireless information and power transfer (SWIPT) has recently drawn significant attention. To meet the practical requirement that the energy receiver (ER) operates with significantly higher received power as compared to the conventional information receiver (IR), ERs need to be deployed in more proximity to the transmitter than IRs in the SWIPT system. However, due to the broadcast nature of wireless channels, one critical issue arises that the messages sent to IRs can be eavesdropped by ERs, which possess better channels from the transmitter. In this paper, we address this new physical-layer security problem in a multiuser multiple-input single-output (MISO) SWIPT system where one multi-antenna transmitter sends information and energy simultaneously to an IR and multiple ERs, each with one single antenna. Two problems are investigated with different practical aims: the first problem maximizes the secrecy rate for the IR subject to individual harvested energy constraints of ERs, while the second problem maximizes the weighted sum-energy transferred to ERs subject to a secrecy rate constraint for IR. We solve these two non-convex problems optimally by a general two-stage procedure. First, by fixing the signal-to-interference-plus-noise ratio (SINR) target for ERs or IR, we obtain the optimal transmit beamforming and power allocation solution by applying the technique of semidefinite relaxation (SDR). Then, each of the two problems is solved by a one-dimension search over the optimal SINR target for ERs or IR. Furthermore, for each problem, suboptimal solutions of lower complexity are proposed.Keywords
Other Versions
This publication has 36 references indexed in Scilit:
- Secrecy Wireless Information and Power Transfer With MISO BeamformingIEEE Transactions on Signal Processing, 2014
- Energy harvesting in an OSTBC based amplify-and-forward MIMO relay systemPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2012
- The Secrecy Capacity of the MIMO Wiretap ChannelIEEE Transactions on Information Theory, 2011
- Multiple-Input Multiple-Output Gaussian Broadcast Channels With Confidential MessagesIEEE Transactions on Information Theory, 2010
- Rank-Constrained Separable Semidefinite Programming With Applications to Optimal BeamformingIEEE Transactions on Signal Processing, 2009
- New results on Hermitian matrix rank-one decompositionMathematical Programming, 2009
- Far-Field Multicast Beamforming for Uniform Linear Antenna ArraysIEEE Transactions on Signal Processing, 2007
- Complex Matrix Decomposition and Quadratic ProgrammingMathematics of Operations Research, 2007
- Achievable Rates in Gaussian MISO Channels with Secrecy ConstraintsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2007
- Strong Duality in Nonconvex Quadratic Optimization with Two Quadratic ConstraintsSIAM Journal on Optimization, 2006