NDLI: Double threshold-based cooperative spectrum sensing for a cognitive radio network with improved energy detectors

Content Provider	IET Digital Library
Author	Bhowmick, Abhijit Chandra, Aniruddha Roy, Sanjay Dhar Kundu, Sumit
Abstract	Performance of cooperative spectrum sensing in a cognitive radio (CR) network is investigated where each CR node uses an improved energy detector (IED) to sense the primary user (PU), and makes a local decision regarding the presence of PU using double thresholds (DTHs). The local hard decisions are combined at fusion centre (FC) to obtain the global decision. The advantage of a DTH-based system over a single threshold based one is, a CR node can opt for no decision when a decision variable lies in the fuzzy zone between two thresholds. Such censoring reduces the transmission overhead between CR and FC without significantly affecting the receiver operating characteristics. In this study, the performance of the abovementioned CR network has been assessed in terms of the average number of normalised transmitted sensing bits (k nor), the total error probability (P e,n ) and optimal number of CR users that ensures minimum Pe,n . It was observed that k nor increases as the signal power raise factor of IED increases or failed sensing probability decreases. Further, the agility of the network improves as the PU death rate increases. Impact of reporting channel on the sensing performance has also been indicated.
Starting Page	2216
Ending Page	2226
Page Count	11
ISSN	17518628
Volume Number	9
e-ISSN	17518636
Issue Number	Issue 18, Dec (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/9/18
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2014.1098
Journal	IET Communications
Publisher Date	2015-12-17
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Agility Gain Cognitive Radio Cognitive Radio Network Combinatorial Mathematics Cooperative Communication CR Network Decision Fusion Decision Variable Double Threshold-based Cooperative Spectrum Sensing DTH-based System Error Probability Error Statistics Failed Sensing Probability Fusion Centre Fuzzy Set Theory Fuzzy Zone IED Improved Energy Detector Primary User Radio Link And Equipment Radio Spectrum Management Receiver Operating Characteristic Sensitivity Analysis Sensor Fusion Signal Detection Statistics Transmission Overhead Reduction
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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