Title :
Energy-Efficient Spectrum Sensing Strategy in Cognitive Radio Networks
Author :
Dongyan Huang ; Guixia Kang ; Bo Wang ; Hui Tian
Author_Institution :
Key Lab. of Universal Wireless Commun. for the Minist. of Educ., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
In this letter, a novel metric is proposed to evaluate the average sensing energy-efficiency of cognitive radio (CR) networks. A theorem as well as the related closed-form expression for determining the optimum number of cooperative sensing cognitive terminals is provided to optimize the proposed metric. According to the theorem, we propose an efficient terminal-assignment strategy for coordinated spectrum sensing. Simulation results show that the proposed strategy can significantly improve the overall average sensing energy efficiency of the CR system.
Keywords :
cognitive radio; radio networks; radio spectrum management; signal detection; CR networks; average sensing energy-efficiency evaluation; cognitive radio networks; cooperative sensing cognitive terminals; coordinated spectrum sensing; energy-efficient spectrum sensing strategy; related closed-form expression; terminal-assignment strategy; Cognitive radio; cooperative/coordinated spectrum sensing; energy-efficiency;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2013.031913.130131
