Energy Efficiency Analysis in Modified GoF Spectrum Sensing-Based AF Relay Cooperative Cognitive Sensor Network with Energy Harvesting

doi:10.1155/2021/3340525

CORC > 西安光学精密机械研究所 > 中国科学院西安光学精密机械研究所 > 瞬态光学技术国家重点实验室

	Energy Efficiency Analysis in Modified GoF Spectrum Sensing-Based AF Relay Cooperative Cognitive Sensor Network with Energy Harvesting
	Mi, Yin 1,2; Lu, Guangyue 1; Gao, Wenbin 1
刊名	Security and Communication Networks
	2021
卷号	2021
ISSN号	19390114;19390122
DOI	10.1155/2021/3340525
产权排序	1
英文摘要	In this paper, we propose a joint sensing duration and transmission power allocation scheme to maximize the energy efficiency (EE) of the secondary user (SU) in a cooperative cognitive sensor network (CSN). At the initial time slot of the frame, the secondary transmitter (ST) performs energy harvesting (EH) and spectrum sensing simultaneously using power splitting (PS) protocol. The modified goodness of fit (GoF) spectrum sensing algorithm is employed to detect the licensed spectrum, which is not sensitive to an inaccurate noise power estimate. Based on the imperfect sensing results, the ST will act as an amplify-and-forward (AF) relay and assist in transmission of the primary user (PU) or transmit its own data. The SU's EE maximization problem is constructed under the constraints of meeting energy causality, sensing reliability, and PU's quality of service (QoS) requirement. Since the SU's EE function is a nonconvex problem and difficult to solve, we transform the original problem into a tractable convex one with the aid of Dinkelbach's method and convex optimization technique by applying a nonlinear fractional programming. The closed-form expression of the ST's transmission power is also derived through Karush-Kuhn-Tucker (KKT) and gradient method. Simulation results show that our scheme is superior to the existing schemes. © 2021 Yin Mi et al.
语种	英语
出版者	Hindawi Limited
内容类型	期刊论文
源URL	[http://ir.opt.ac.cn/handle/181661/95625]
专题	西安光学精密机械研究所_瞬态光学技术国家重点实验室
作者单位	1.School of Communications and Information Engineering, Xi'An University of Posts and Telecommunications, Xi'an; 710121, China 2.Xi'An Institute of Optics and Precision Mechanics of CAS, University of Chinese Academy of Sciences, Xi'an; 710119, China;
推荐引用方式 GB/T 7714	Mi, Yin,Lu, Guangyue,Gao, Wenbin. Energy Efficiency Analysis in Modified GoF Spectrum Sensing-Based AF Relay Cooperative Cognitive Sensor Network with Energy Harvesting[J]. Security and Communication Networks,2021,2021.
APA	Mi, Yin,Lu, Guangyue,&Gao, Wenbin.(2021).Energy Efficiency Analysis in Modified GoF Spectrum Sensing-Based AF Relay Cooperative Cognitive Sensor Network with Energy Harvesting.Security and Communication Networks,2021.
MLA	Mi, Yin,et al."Energy Efficiency Analysis in Modified GoF Spectrum Sensing-Based AF Relay Cooperative Cognitive Sensor Network with Energy Harvesting".Security and Communication Networks 2021(2021).