Capacity optimization for local and cooperative spectrum sensing in cognitive radio networks

El-Saleh, A. A. and Ali, M. A. M. and Ismail, M. (2009) Capacity optimization for local and cooperative spectrum sensing in cognitive radio networks. World Academy of Science, Engineering and Technology (WASET), 26 (12). pp. 64-70. ISSN 2010-376X

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Abstract

The dynamic spectrum allocation solutions such as cognitive radio networks have been proposed as a key technology to exploit the frequency segments that are spectrally underutilized. Cognitive radio users work as secondary users who need to constantly and rapidly sense the presence of primary users or licensees to utilize their frequency bands if they are inactive. Short sensing cycles should be run by the secondary users to achieve higher throughput rates as well as to provide low level of interference to the primary users by immediately vacating their channels once they have been detected. In this paper, the throughput-sensing time relationship in local and cooperative spectrum sensing has been investigated under two distinct scenarios, namely, constant primary user protection (CPUP) and constant secondary user spectrum usability (CSUSU) scenarios. The simulation results show that the design of sensing slot duration is very critical and depends on the number of cooperating users under CPUP scenario whereas under CSUSU, cooperating more users has no effect if the sensing time used exceeds 5% of the total frame duration.

Item Type: Article
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Suzilawati Abu Samah
Date Deposited: 06 Feb 2014 03:27
Last Modified: 06 Feb 2014 03:27
URI: http://shdl.mmu.edu.my/id/eprint/5095

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