Power-Efficient and Secure WPCNs With Hardware Impairments and Non-Linear EH Circuit

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Boshkovska E, Wing Kwan Ng D, Dai L, Schober R
Zeitschrift: IEEE Transactions on Communications
Jahr der Veröffentlichung: 2017
Band: 66
Heftnummer: 6
Seitenbereich: 2642 - 2657
ISSN: 0090-6778
Sprache: Englisch


Abstract

In this paper, we design a robust resource allocation algorithm for a wireless-powered communication network (WPCN) taking into account residual hardware impairments (HWIs) at the transceivers, the imperfectness of the channel state information, and the non-linearity of practical radio frequency energy harvesting circuits. In order to ensure power-efficient secure communication, physical layer security techniques are exploited to deliberately degrade the channel quality of a multiple-antenna eavesdropper. The resource allocation algorithm design is formulated as a non-convex optimization problem for minimization of the total power consumption in the network, while guaranteeing the quality of service of the information receivers in terms of secrecy rate. The globally optimal solution of the optimization problem is obtained via a 2-D search and semidefinite programming relaxation. To strike a balance between computational complexity and system performance, a low-complexity iterative suboptimal resource allocation algorithm is also proposed. Numerical results demonstrate that both the proposed optimal and suboptimal schemes can significantly reduce the total system power consumption required for guaranteeing secure communication, and unveil the impact of HWIs on the system performance: 1) residual HWIs create a system performance bottleneck in WPCN in the high transmit/receive power regimes; 2) increasing the number of transmit antennas can effectively reduce the power consumption of wireless power transfer and alleviate the performance degradation due to residual HWIs; and 3) imperfect CSI exacerbates the impact of residual HWIs, which increases the power consumption of both wireless power and wireless information transfer.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Boshkovska, Elena
Lehrstuhl für Digitale Übertragung
Schober, Robert Prof. Dr.-Ing.
Lehrstuhl für Digitale Übertragung


Einrichtungen weiterer Autorinnen und Autoren

Tsinghua University
University of New South Wales (UNSW)


Zitierweisen

APA:
Boshkovska, E., Wing Kwan Ng, D., Dai, L., & Schober, R. (2017). Power-Efficient and Secure WPCNs With Hardware Impairments and Non-Linear EH Circuit. IEEE Transactions on Communications, 66(6), 2642 - 2657. https://dx.doi.org/10.1109/TCOMM.2017.2783628

MLA:
Boshkovska, Elena, et al. "Power-Efficient and Secure WPCNs With Hardware Impairments and Non-Linear EH Circuit." IEEE Transactions on Communications 66.6 (2017): 2642 - 2657.

BibTeX: 

Zuletzt aktualisiert 2019-10-08 um 16:10