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A Diffusion-Based Distributed Collaborative Energy Detection Algorithm for Spectrum Sensing in Cognitive Radio
The National Institute of Radio Spectrum Management, Xi’an, China
School of Communication and Information Engineering, Xi’an University of Posts & Telecommunications, Xi’an, China
State Key Lab of Wireless Mobile Communication, China Academy of Telecommunication Technology, Beijing, Chin
The National Institute of Radio Spectrum Management, Xi’an, China
- 1 The National Institute of Radio Spectrum Management, Xi’an, China
- 2 School of Communication and Information Engineering, Xi’an University of Posts & Telecommunications, Xi’an, China
- 3 State Key Lab of Wireless Mobile Communication, China Academy of Telecommunication Technology, Beijing, Chin
- 4 The National Institute of Radio Spectrum Management, Xi’an, China
Communications and Network·Volume 05 (2013)·Pages 276–279·Published 27 September 2013·DOI10.4236/cn.2013.53B2051
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Abstract
Spectrum sensing is one of the most important steps in cognitive radio. In this paper, a new fully-distributed collaborative energy detection algorithm based on diffusion cooperation scheme and consensus filtering theory is proposed, which doesn’t need the center node to fuse the detection results of all users. The secondary users only exchange information with their neighbors to obtain the detection data, and then make the corresponding decisions independently according to the pre-defined threshold. Simulations show that the proposed algorithm is more superior to the existing centralized collaborative energy detection algorithm in terms of the detecting performance and robustness in the insecurity situation.
KeywordsCollaborative Energy DetectionData DiffusionCognitive RadioSpectrum Sensing
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