Collaborative Spectrum Sensing Optimisation Algorithms for Cognitive Radio Networks
The main challenge for a cognitive radio is to detect the existence of primary users reliably in order to minimise the interference to licensed communications. Hence, spectrum sensing is a most important requirement of a cognitive radio. However, due to the channel uncertainties, local observations...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Hindawi Limited
2010-01-01
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| Series: | International Journal of Digital Multimedia Broadcasting |
| Online Access: | http://dx.doi.org/10.1155/2010/424036 |
| _version_ | 1826998778823966720 |
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| author | Kamran Arshad Muhammad Ali Imran Klaus Moessner |
| author_facet | Kamran Arshad Muhammad Ali Imran Klaus Moessner |
| author_sort | Kamran Arshad |
| collection | DOAJ |
| description | The main challenge for a cognitive radio is to detect the existence of primary users reliably in order to
minimise the interference to licensed communications. Hence, spectrum sensing is a most important requirement
of a cognitive radio. However, due to the channel uncertainties, local observations are not reliable and collaboration
among users is required. Selection of fusion rule at a common receiver has a direct impact on the overall spectrum
sensing performance. In this paper, optimisation of collaborative spectrum sensing in terms of optimum decision
fusion is studied for hard and soft decision combining. It is concluded that for optimum fusion, the fusion centre
must incorporate signal-to-noise ratio values of cognitive users and the channel conditions. A genetic algorithm-based weighted optimisation strategy is presented for the case of soft decision combining. Numerical results show
that the proposed optimised collaborative spectrum sensing schemes give better spectrum sensing performance. |
| first_indexed | 2024-04-11T23:14:14Z |
| format | Article |
| id | doaj.art-72afe4972c8b40d994e073c83c879213 |
| institution | Directory Open Access Journal |
| issn | 1687-7578 1687-7586 |
| language | English |
| last_indexed | 2025-02-18T10:20:31Z |
| publishDate | 2010-01-01 |
| publisher | Hindawi Limited |
| record_format | Article |
| series | International Journal of Digital Multimedia Broadcasting |
| spelling | doaj.art-72afe4972c8b40d994e073c83c8792132024-11-02T05:31:31ZengHindawi LimitedInternational Journal of Digital Multimedia Broadcasting1687-75781687-75862010-01-01201010.1155/2010/424036424036Collaborative Spectrum Sensing Optimisation Algorithms for Cognitive Radio NetworksKamran Arshad0Muhammad Ali Imran1Klaus Moessner2Centre for Communication Systems Research, University of Surrey, Guildford GU2 7XH, UKCentre for Communication Systems Research, University of Surrey, Guildford GU2 7XH, UKCentre for Communication Systems Research, University of Surrey, Guildford GU2 7XH, UKThe main challenge for a cognitive radio is to detect the existence of primary users reliably in order to minimise the interference to licensed communications. Hence, spectrum sensing is a most important requirement of a cognitive radio. However, due to the channel uncertainties, local observations are not reliable and collaboration among users is required. Selection of fusion rule at a common receiver has a direct impact on the overall spectrum sensing performance. In this paper, optimisation of collaborative spectrum sensing in terms of optimum decision fusion is studied for hard and soft decision combining. It is concluded that for optimum fusion, the fusion centre must incorporate signal-to-noise ratio values of cognitive users and the channel conditions. A genetic algorithm-based weighted optimisation strategy is presented for the case of soft decision combining. Numerical results show that the proposed optimised collaborative spectrum sensing schemes give better spectrum sensing performance.http://dx.doi.org/10.1155/2010/424036 |
| spellingShingle | Kamran Arshad Muhammad Ali Imran Klaus Moessner Collaborative Spectrum Sensing Optimisation Algorithms for Cognitive Radio Networks International Journal of Digital Multimedia Broadcasting |
| title | Collaborative Spectrum Sensing Optimisation Algorithms for Cognitive Radio Networks |
| title_full | Collaborative Spectrum Sensing Optimisation Algorithms for Cognitive Radio Networks |
| title_fullStr | Collaborative Spectrum Sensing Optimisation Algorithms for Cognitive Radio Networks |
| title_full_unstemmed | Collaborative Spectrum Sensing Optimisation Algorithms for Cognitive Radio Networks |
| title_short | Collaborative Spectrum Sensing Optimisation Algorithms for Cognitive Radio Networks |
| title_sort | collaborative spectrum sensing optimisation algorithms for cognitive radio networks |
| url | http://dx.doi.org/10.1155/2010/424036 |
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