Joint impact of sensing time and IED parameter on the performance of an energy efficient cognitive radio system. (28th June 2016)

• Record Type: Journal Article
• Authors: Bhowmick, Abhijit; Dhar Roy, Sanjay; Kundu, Sumit
• Is Part Of: International journal of communication systems. Volume 29:Number 15(2016)
• Page Start: 2262
• Page End: 2278
• Publication Date: 2016-06-28
• Subjects: Cognitive radio -- collision probability -- energy efficiency -- IED parameter; Telecommunication systems -- Periodicals; 621.382
• DOI: 10.1002/dac.3160
• Languages: English
• ISSNs: 1074-5351

Abstract

Summary: Joint impact of sensing time and improved energy detector (IED) parameter is evaluated for an energy efficient cooperative cognitive radio (CR) system where the CR users use IED. The aim of this work is to design the CR system in such a way that it can achieve two objectives for a given level of protection on primary user: (i) optimization of sensing time to make balance between detection performance and throughput and (ii) appropriate allocation of energy between sensing time and transmission time so as to enhance the energy efficiency of the CR system. The key parameters such as sensing time and IED parameter are set appropriately to meet the objectives. The performance is assessed in terms of throughput and energy efficiency of the system. The effect of the sensing time and the IED parameter on the performance is evaluated under a collision constraint. Furthermore, the optimal sensing time and IED parameter are investigated jointly for which the higher throughput as well as maximum energy efficiency can be obtained, and at the same time, a desired detection probability can also be maintained by the CR system. Copyright © 2016 John Wiley & Sons, Ltd. Abstract : Joint impact of sensing time and improved energy detector (IED) parameter is evaluated for an energy‐efficient cooperative cognitive radio (CR) system where the CR users use IED. The performance is assessed in terms of throughput and energy efficiency of the system. Throughput as well as energy efficiency of the system are degraded because of the re‐occupation of the given spectrum band by primary user or increase in the number of CRs in cooperation. There exists an optimal value of sensing time and an IED parameter for which energy efficiency is maximized.