Secrecy Wireless Information and Power Transfer With MISO Beamforming

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 receiv...

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Veröffentlicht in:IEEE transactions on signal processing Jg. 62; H. 7; S. 1850 - 1863
Hauptverfasser: Liu, Liang, Zhang, Rui, Chua, Kee-Chaing
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York, NY IEEE 01.04.2014
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Applied sciences
Array signal processing
artificial noise
Beamforming
Channels
Communication system security
Detection, estimation, filtering, equalization, prediction
energy harvesting
Energy transmission
Exact sciences and technology
Heuristic
Information, signal and communications theory
Optimization
physical layer security
power control
Power transfer
Receivers
Receivers & amplifiers
Searching
semi definite relaxation (SDR)
Signal and communications theory
Signal to noise ratio
Signal, noise
Simultaneous wireless information and power transfer (SWIPT)
Telecommunications and information theory
Transmitters
Vectors
Wireless communication
wireless power
Wireless telecommunication
Transmitter
Wireless electricity
Power allocation
Beam forming
Relaxation
Safety
MISO system
Multiple access
artificial noise
Multistage method
Radio wave
semi-definite relaxation (SDR)
energy harvesting
Simultaneous wireless information and power transfer (SWIPT)
Transmitting antenna
Power control
wireless power
One dimensional model
Telecommunication channels
Signal processing
physical layer security
Signal to interference plus noise ratio
beamforming
Secrecy
Software radio
ISSN:1053-587X, 1941-0476
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Zusammenfassung: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.
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ISSN:1053-587X
1941-0476
DOI:10.1109/TSP.2014.2303422