Secure energy efficiency optimization for MISO cognitive radio network with energy harvesting

TY - GEN

T1 - Secure energy efficiency optimization for MISO cognitive radio network with energy harvesting

AU - Zhang, Miao

AU - Cumanan, Kanapathippillai

AU - Burr, Alister

N1 - Funding Information: The work of all authors was supported by H2020-MSCARISE-2015 under grant number 690750. Publisher Copyright: © 2017 IEEE.

PY - 2017/12/7

Y1 - 2017/12/7

N2 - This paper investigates a secure energy efficiency (SEE) optimization problem in a multiple-input single-output (MISO) underlay cognitive radio (CR) network. In particular, a multi-antenna secondary transmitter (SU-Tx) simultaneously sends secured information and energy to a secondary receiver (SU-Rx) and an energy receiver (ER), respectively, in the presence of a primary receiver (PU-Rx). It is assumed that the SU-Rx, ER and PU-Rx are each equipped with a single antenna. In addition, the SU-Tx should satisfy constraints on maximum interference leakage to the PU-Rx and minimum harvested energy at the ER. In this CR network, we consider the transmit covariance matrix design with the assumption of perfect channel state information (CSI) at the SU-Tx. In addition, it is assumed that the ER is a potential passive eavesdropper due to broadcast nature of wireless transmission. On the other hand, we consider the worst-case scenario that ER's energy harvesting requirement is only satisfied when it performs only energy harvesting without intercepting or eavesdropping information intended for the SU-Rx. We formulate this transmit covariance matrix design as a SEE maximization problem which is a non-convex problem due the non-linear fractional objective function. To realize the solution for this non-convex problem, we utilize the non-linear fractional programming and difference of concave (DC) functions approaches to reformulate into a tractable form. Based on these techniques and the Dinkelbach's method, we propose iterative algorithms to determine the solution for the original SEE maximization problem. Numerical simulation results are provided to demonstrate the performance of the proposed transmit covariance matrix design and convergence of the proposed algorithms.

AB - This paper investigates a secure energy efficiency (SEE) optimization problem in a multiple-input single-output (MISO) underlay cognitive radio (CR) network. In particular, a multi-antenna secondary transmitter (SU-Tx) simultaneously sends secured information and energy to a secondary receiver (SU-Rx) and an energy receiver (ER), respectively, in the presence of a primary receiver (PU-Rx). It is assumed that the SU-Rx, ER and PU-Rx are each equipped with a single antenna. In addition, the SU-Tx should satisfy constraints on maximum interference leakage to the PU-Rx and minimum harvested energy at the ER. In this CR network, we consider the transmit covariance matrix design with the assumption of perfect channel state information (CSI) at the SU-Tx. In addition, it is assumed that the ER is a potential passive eavesdropper due to broadcast nature of wireless transmission. On the other hand, we consider the worst-case scenario that ER's energy harvesting requirement is only satisfied when it performs only energy harvesting without intercepting or eavesdropping information intended for the SU-Rx. We formulate this transmit covariance matrix design as a SEE maximization problem which is a non-convex problem due the non-linear fractional objective function. To realize the solution for this non-convex problem, we utilize the non-linear fractional programming and difference of concave (DC) functions approaches to reformulate into a tractable form. Based on these techniques and the Dinkelbach's method, we propose iterative algorithms to determine the solution for the original SEE maximization problem. Numerical simulation results are provided to demonstrate the performance of the proposed transmit covariance matrix design and convergence of the proposed algorithms.

KW - convex optimization

KW - energy harvesting

KW - MISO

KW - Secure energy efficiency (SEE)

UR - http://www.scopus.com/inward/record.url?scp=85046458489&partnerID=8YFLogxK

U2 - 10.1109/WCSP.2017.8171082

DO - 10.1109/WCSP.2017.8171082

M3 - Conference contribution

AN - SCOPUS:85046458489

T3 - 2017 9th International Conference on Wireless Communications and Signal Processing, WCSP 2017 - Proceedings

SP - 1

EP - 6

BT - 2017 9th International Conference on Wireless Communications and Signal Processing, WCSP 2017 - Proceedings

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 9th International Conference on Wireless Communications and Signal Processing, WCSP 2017

Y2 - 11 October 2017 through 13 October 2017

ER -