NDLI: Novel study on Cooperative Spectrum Sensing for Cognitive Radio

Content Provider	IEEE Xplore Digital Library
Author	Yunxue Liu Dongfeng Yuan Mingyan Jiang Yanbo Ma Jiali Xu
Copyright Year	2008
Description	Author affiliation: Sch. of Inf. Sci. & Eng., Shandong Univ., Jinan (Yunxue Liu; Dongfeng Yuan; Mingyan Jiang; Yanbo Ma; Jiali Xu)
Abstract	In cognitive networks, cooperative spectrum sensing is employed to detect the presence of primary user quickly. In this paper, we study the improvement in sensing performance of a cognitive user $U_{1}$ by allowing another cognitive user $U_{2}$ to act as its relay. We derive the expression of SNR, and exploit the improvement in SNR to explain why the sensing performance may be improved by using cooperation. For the situation where there is power constraint for $U_{2}$ when acting as a relay, we pay more attention to studying which parameter affects the sensing performance significantly. We first develop a new numerical model for sensing performance analysis, then we address that, the product of transmission power of cognitive radio and channel gain (between cognitive users) is tightly related to the value of SNR. Further, we propose an important parameter beta that can be predetermined in a practical cognitive network, and show that beta impact the sensing performance greatly.
Starting Page	1
Ending Page	5
File Size	247729
Page Count	5
File Format	PDF
ISBN	9781424421077
DOI	10.1109/WiCom.2008.320
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-12
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Information science Analytical models Protocols Radio transmitters Performance gain Numerical simulation Numerical models Performance analysis Cognitive radio Relays
Content Type	Text
Resource Type	Article

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