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Comparative Analysis of Blind Spectrum Sensing Techniques over Fading Channel

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dc.contributor.advisor Murad, Ridwan (PhD)
dc.contributor.author Milkias, Hailu
dc.date.accessioned 2019-04-10T06:41:15Z
dc.date.available 2019-04-10T06:41:15Z
dc.date.issued 2018-12
dc.identifier.uri http://etd.aau.edu.et/handle/123456789/17769
dc.description.abstract A spectrum is a scarce and precious natural resource and a matter of concern with the rapidly growing wireless communications. However, studies show that licensed spectrum is underutilized. Cognitive radio system allows unlicensed users also called secondary users to access licensed spectrum band also known as spectrum hole of primary user when they are not occupied. To do this the secondary users need to continuously monitor the licensed user’s activity to find the unused band. Spectrum sensing is the key task for cognitive radio which prevents the unwanted interferences with authorized users to recognize available radio spectrum and enhance the usage of spectrum. Spectrum sensing is also a tough task because of shadowing, fading, and time-varying nature of wireless channels. This thesis investigates the difference in performance of energy detection and eigenvalue based blind spectrum sensing techniques (without having prior knowledge) by implementing it over different environmental models and compares the Receiver Operating Characteristics (ROC) curves. Evaluation and analysis of performance is done by using Monte Carlo method with MATLAB software. The implementation gives detail comparison between blind spectrum sensing technique performances over fading channel and multiple network nodes. In particular, the result shows the minimum required energy level for optimal detection (with acceptable interference) over fading channel and also how effectively cooperative en_US
dc.language.iso en_US en_US
dc.publisher Addis Ababa University en_US
dc.subject Cognitive radio en_US
dc.subject energy detection en_US
dc.subject eigenvalue based detection en_US
dc.subject blind spectrum sensing en_US
dc.subject fading channels en_US
dc.subject spectrum hole en_US
dc.title Comparative Analysis of Blind Spectrum Sensing Techniques over Fading Channel en_US
dc.type Thesis en_US

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