Title :
Energy-Efficient Joint Design of Sensing and Transmission Durations for Protection of Primary User in Cognitive Radio Systems
Author :
Zhiping Shi ; Kah Chan Teh ; Kwok Hung Li
Author_Institution :
Nat. Key Lab. of Sci. & Technol. on Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this paper, we consider a joint design of energy-efficient sensing and transmission durations for a cognitive radio (CR) system in which the primary user (PU) is protected. The design problem is formulated as a function of two variables, which are sensing and transmission durations, subject to the interference to the PU. The optimal solutions are analyzed and a sub-optimal algorithm that maximizes the energy efficiency for the CR system is presented. The performance of the proposed energy-efficient design for the CR system is also evaluated.
Keywords :
cognitive radio; cognitive radio systems; energy-efficient joint design; energy-efficient sensing; optimal solutions; primary user protection; sensing durations; suboptimal algorithm; transmission durations; Cognitive radio; Interference; Iterative methods; Joints; Linear programming; Optimization; Sensors; Cognitive radio; energy efficiency; interference; sensing duration; transmission duration;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2013.012313.122442
