NDLI: New Insights to Cooperative Spectrum Sensing for Cognitive radios

Content Provider	IEEE Xplore Digital Library
Author	Liu, Yunxue Yuan, Dongfeng Lin, Qingjia Liang, Quanquan Jin, Qingqing
Copyright Year	2007
Description	Author affiliation: School of Information Science and Engineering, Shandong University, Jinan, Shandong 250100, China, qingjia.lin@163.com (Lin, Qingjia) \|\| School of Information Science and Engineering, Shandong University, Jinan, Shandong 250100, China, quanquan406@sdu.edu.cn (Liang, Quanquan) \|\| School of Information Science and Engineering, Shandong University, Jinan, Shandong 250100, China, School of science and technology for opto-electronic information, Yantai University, Yantai,shandong 264005, China, Sdytrslyx@vip.163.com (Liu, Yunxue) \|\| School of Information Science and Engineering, Shandong University, Jinan, Shandong 250100, China, dfyuan@sdu.edu.cn (Yuan, Dongfeng) \|\| School of Information Science and Engineering, Shandong University, Jinan, Shandong 250100, China, qingqingjin@sdu.edu.cn (Jin, Qingqing)
Abstract	In cognitive radio networks, cognitive users have to detect the presence of primary users. In this paper, we exhibit the improvement in the probability of detection of an user U1 by allowing other user U2 to act as a relay. Assuming that users experience Rayleigh fading, and the decision statistic is the instantaneous power, at the same time, there is no transmit power constraint to relay, we find that the improvement can not be always achieved when the relay U2 receives larger power from a primary user than the user U1 does, which is different from the traditional viewpoint. Conclusions are confirmed by the theoretic proof and numerical simulations. We also exhibit that the improvement can be achieved if and only if the received power at the relay due to the primary user is larger than a certain value, which is named the gain point. We then derive the expression and present an approximated function for determining the gain point.
Starting Page	414
Ending Page	419
File Size	5544495
Page Count	6
File Format	PDF
ISBN	9781424408146
DOI	10.1109/CROWNCOM.2007.4549834
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-08-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Protocols Rayleigh channels Probability Cognitive radio Relays Statistics Radio spectrum management Wireless sensor networks cooperative diversity cognitive radio cooperative spectrum sensing spectrum sensing Numerical simulation Frequency
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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