Collaborative spectrum sensing: Optimising the number of collaborating users

Arshad, K and Moessner, K (2009) Collaborative spectrum sensing: Optimising the number of collaborating users

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Abstract

In the IEEE 802.22 standard, the spectrum sensing mechanism is identified as a key functionality of a cognitive radio. Due to the channel uncertainty, a single cognitive user, in most cases, can not make a reliable decision and hence collaboration or cooperation of and among multiple users is required. However, when large number of cognitive users are collaborating with each other, the bandwidth requirements for sending their result to the fusion centre tends to be very large. In this paper, a metric for spectrum efficiency is defined and used for the optimisation of collaborative spectrum sensing. An optimisation algorithm is presented to calculate the optimal number of collaborating cognitive users with the aim to maximise overall spectrum efficiency by satisfying certain constraints in terms of global probability of detection and probability of false alarm. Numerical results show that for maximum spectrum efficiency collaboration of only a subset of the available cognitive users is required. © 2009 IEEE.

Item Type:	Conference or Workshop Item (UNSPECIFIED)
Divisions :	Surrey research (other units)
Authors :	Name Email ORCID Arshad, K Moessner, K k.moessner@surrey.ac.uk
Date :	1 December 2009
DOI :	10.1109/UKIWCWS.2009.5749394
Depositing User :	Symplectic Elements
Date Deposited :	17 May 2017 12:03
Last Modified :	23 Jan 2020 17:33
URI:	http://epubs.surrey.ac.uk/id/eprint/833838

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