A Survey on Cooperative Spectrum Sensing Techniques for Cognitive Radio Networks | |
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( Volume 1 Issue 6,December 2015 ) OPEN ACCESS | |
Author(s): | |
K.C.Sriharipriya, Dr.K. Baskaran | |
Abstract: | |
The functionality of Cognitive Radio is to detect the presence and absence of licensed user (i.e.) Primary User, in the spectrum, so that the secondary user can use it. Many works has been contributed on spectrum sensing of cognitive radio with single user, which has less complexity but offers inferior detection performance compared to cognitive radio with multiple users. Further there arises hidden user problem in single user system which degrades the system performance. Therefore, it is advisable to use multiple cognitive radio users to sense the spectrum individually and combine their result at the fusion centre. This technique is known as co-operative spectrum sensing. Cooperative sensing is considered to be a boon to the problems that arise in spectrum sensing due to noise uncertainty, fading and shadowing. Further, co-operative sensing decreases the probabilities of miss detection and false alarm to a considerable extent. This paper presents various co-operative spectrum sensing techniques with exhaustive survey and comparison. |
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