Energy-Efficient Joint Design of Sensing and Transmission Durations for Protection of Primary User in Cognitive Radio Systems

• Published in: IEEE communications letters Vol. 17; no. 3; pp. 565 - 568
• Main Authors: Shi, Zhiping, Teh, Kah Chan, Li, Kwok Hung
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.03.2013; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Applied sciences; Cognitive radio; Computational efficiency; Computing time; Design engineering; Detection; energy efficiency; Exact sciences and technology; Interference; Iterative methods; Joints; Linear programming; Optimization; Plutonium; Radiocommunication specific techniques; Radiocommunications; sensing duration; Sensors; Telecommunications; Telecommunications and information theory; transmission duration; Performance evaluation; Optimal algorithm; sensing duration; Cognitive radio; Cognitive system; Joint detection; Energetic efficiency; Optimal solution; energy efficiency; Electric power consumption; Minimum energy; interference; Low-power electronics; transmission duration; Software radio
• ISSN: 1089-7798; 1558-2558
• DOI: 10.1109/LCOMM.2013.012313.122442

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.