NDLI: Asynchronous cooperative spectrum sensing in cognitive radio

Content Provider	IEEE Xplore Digital Library
Author	Xiong Zhang Zhengding Qiu Dazhong Mu
Copyright Year	2008
Description	Author affiliation: Inst. of Inf. Sci., Beijing Jiaotong Univ., Beijing (Xiong Zhang; Zhengding Qiu; Dazhong Mu)
Abstract	In cognitive radio networks, the cognitive radio users can be collaborated to perform spectrum sensing so as to detect the primary user more accurately. However, when the sensing nodes suffer from fading, shadowing, and time-varying nature of wireless channels, it needs to set a long observation time for all of the nodes to make decisions and forward the results to fusion center, which induce the severe degradation of the sensing performance. In this paper, we propose an asynchronous cooperative spectrum sensing method, in which the cognitive radio user with high SNR finishes the detection earlier than the one with low SNR, and the fusion center makes the final decision depending on the earliest local decision. The proposed method can exploit the userpsilas SNR diversity so that the sensing performance can be enhanced. Simulation results show that the detection time is reduced significantly at the expense of a little sensing performance degradation compared to the conventional cooperative spectrum sensing.
Starting Page	2020
Ending Page	2023
File Size	136772
Page Count	4
File Format	PDF
ISBN	9781424421787
DOI	10.1109/ICOSP.2008.4697541
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-26
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cognitive radio Chromium Frequency Wireless sensor networks Degradation Wireless communication Information science Educational institutions Electronic mail Collaboration
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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