Cooperative spectrum sensing of cognitive radio

Recently, the concept of cognitive radio has been introduced to overcome the shortage of frequency spectrum, due to the rapid development of telecommunication technology and the policy of fixed-spectrum assignment, which emerged over the last one hundred years. Spectrum sensing is the key function t...

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Main Author: Tran, Nhu Hai.
Other Authors: Li Kwok Hung
Format: Final Year Project
Language:English
Published: 2012
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Online Access:http://hdl.handle.net/10356/47594
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-475942023-07-07T17:19:18Z Cooperative spectrum sensing of cognitive radio Tran, Nhu Hai. Li Kwok Hung Teh Kah Chan School of Electrical and Electronic Engineering A*STAR Institute for Infocomm Research DRNTU::Engineering::Electrical and electronic engineering::Antennas, wave guides, microwaves, radar, radio Recently, the concept of cognitive radio has been introduced to overcome the shortage of frequency spectrum, due to the rapid development of telecommunication technology and the policy of fixed-spectrum assignment, which emerged over the last one hundred years. Spectrum sensing is the key function that enables the deployment of cognitive radio network, by actively detecting primary users’ signals. In the early stage of development, spectrum sensing is done by a single cognitive radio based on some well-known technique such as matched filter, energy detection and cyclo-stationary. However, such techniques are often suffered from the fading or shadowing channel problem. Therefore, cooperative spectrum sensing is proposed to mitigate the effects of disturbed channel condition. In the report, first the most prevalent single sensing technique, energy detection, is discussed. Then, it is dedicated to investigate two approaches of cognitive spectrum sensing, which are soft combination and hard combination. The report shows that the cooperative spectrum sensing has better performance as compared to single spectrum sensing; nevertheless, it is also more complicated. Although, soft combination cooperative sensing shows its superiority to that of hard combination in terms of performance, it also requires more complexity. Currently, the optimum method for soft-combination has been found, yet such a method for hard-combination has not been proposed. Therefore, in the future, more research should focus on that. Bachelor of Engineering 2012-01-16T07:40:03Z 2012-01-16T07:40:03Z 2011 2011 Final Year Project (FYP) http://hdl.handle.net/10356/47594 en Nanyang Technological University 82 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Electrical and electronic engineering::Antennas, wave guides, microwaves, radar, radio
spellingShingle DRNTU::Engineering::Electrical and electronic engineering::Antennas, wave guides, microwaves, radar, radio
Tran, Nhu Hai.
Cooperative spectrum sensing of cognitive radio
description Recently, the concept of cognitive radio has been introduced to overcome the shortage of frequency spectrum, due to the rapid development of telecommunication technology and the policy of fixed-spectrum assignment, which emerged over the last one hundred years. Spectrum sensing is the key function that enables the deployment of cognitive radio network, by actively detecting primary users’ signals. In the early stage of development, spectrum sensing is done by a single cognitive radio based on some well-known technique such as matched filter, energy detection and cyclo-stationary. However, such techniques are often suffered from the fading or shadowing channel problem. Therefore, cooperative spectrum sensing is proposed to mitigate the effects of disturbed channel condition. In the report, first the most prevalent single sensing technique, energy detection, is discussed. Then, it is dedicated to investigate two approaches of cognitive spectrum sensing, which are soft combination and hard combination. The report shows that the cooperative spectrum sensing has better performance as compared to single spectrum sensing; nevertheless, it is also more complicated. Although, soft combination cooperative sensing shows its superiority to that of hard combination in terms of performance, it also requires more complexity. Currently, the optimum method for soft-combination has been found, yet such a method for hard-combination has not been proposed. Therefore, in the future, more research should focus on that.
author2 Li Kwok Hung
author_facet Li Kwok Hung
Tran, Nhu Hai.
format Final Year Project
author Tran, Nhu Hai.
author_sort Tran, Nhu Hai.
title Cooperative spectrum sensing of cognitive radio
title_short Cooperative spectrum sensing of cognitive radio
title_full Cooperative spectrum sensing of cognitive radio
title_fullStr Cooperative spectrum sensing of cognitive radio
title_full_unstemmed Cooperative spectrum sensing of cognitive radio
title_sort cooperative spectrum sensing of cognitive radio
publishDate 2012
url http://hdl.handle.net/10356/47594
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