APSIPA Transactions on Signal and Information Processing > Vol 7 > Issue 1

Cooperative spectrum sensing based on adaptive activation of energy and preamble detector for cognitive radio networks

Ashish Rauniyar, Kumoh National Institute of Technology, South-Korea, Soo Young Shin, Kumoh National Institute of Technology, South-Korea, wdragon@kumoh.ac.kr
 
Suggested Citation
Ashish Rauniyar and Soo Young Shin (2018), "Cooperative spectrum sensing based on adaptive activation of energy and preamble detector for cognitive radio networks", APSIPA Transactions on Signal and Information Processing: Vol. 7: No. 1, e2. http://dx.doi.org/10.1017/ATSIP.2018.5

Publication Date: 07 Mar 2018
© 2018 Ashish Rauniyar and Soo Young Shin
 
Subjects
 
Keywords
Spectrum sensingCognitive radio networksEnergy detectorPreamble detectorAdaptive activation
 

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This is published under the terms of the Creative Commons Attribution licence.

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In this article:
I. INTRODUCTION 
II. STRUCTURES OF ENERGY DETECTOR AND PREAMBLE DETECTOR 
III. PROPOSED SCHEME 
IV. NUMERICAL RESULTS 
V. CONCLUSION 
DISCLOSURE STATEMENT 

Abstract

In this paper, we propose a new cooperative spectrum sensing method based on adaptive activation of energy detector (ED) and preamble detector (PD) for cognitive radio networks. The ED performance is highly degraded under low signal to noise ratio and noise uncertainty condition. To alleviate the problem of ED and increase the sensing performance, we have used adaptive activation of energy efficient ED and reliable PD. As the first step of our proposed method, we have used ED to take a decision in the clear region where the detector can easily make its own local decision. There are two thresholds for the measured energy in the first step. If the sensed energy in the first step is between these two thresholds, the second step which involves the activation of cooperative PD is triggered to make an appropriate decision on the presence or absence of primary users's signal. Otherwise, the second step detector PD is not activated. In this way, we can enhance the detection performance and energy efficiency by taking the collaborative advantages of ED and PD at the same time. Simulation results validate the effectiveness of our proposed method as compared with conventional schemes.

DOI:10.1017/ATSIP.2018.5