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Enhancement of the Detection Probability for Distributed Cooperative Spectrum Sensing using UWB as a Common Channel  

Islam, A.B.M.Tariqul (Department of Electronics & Radio Engineering, Kyung Hee University)
Song, Ju-Bin (Department of Electronics & Radio Engineering, Kyung Hee University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.45, no.7, 2008 , pp. 22-31 More about this Journal
Abstract
Cognitive radio should imply a proper sensing technique for detecting the presence of licensed users to identify the unused spectrum holes. Besides this, this information should also be used to opportunistically provide communication among secondary users. At the same time the performance of the primary user should not be declined by the secondary users. The detection of licensed users may be significantly difficult for shadowing effect. To prevail over this problem cooperative spectrum sensing, In which the combined observation information gained by multiple secondary users is employed to achieve higher performance of detection, has been inspected. However, the primary challenge of cooperative sensing lays in its ability to detect the presence of licensed user quickly and accurately. In this paper, we have used UltraWideBand (UWB) to detect the presence of licensed users and transmit the sensing information among the nodes of the network. UWB has the capability of transmitting data at a very high rate. It is unique in co-existence capability with narrow band systems. Here, we have shown that the detection probability of licensed user is improved by means of transmitting the spectrum sensing information via UWB. We also have analyzed the throughput of the proposed technique and compared the result with existing sensing method.
Keywords
Cognitive radio; cooperative spectrum sensing; UWB supported cognitive radio networks;
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