Spectrum Sensing and Allocation of Cognitive Radio Networks

	International Journal of P2P Network Trends and Technology (IJPTT)
	© 2015 by IJPTT Journal
	Volume - 5 Issue - 6
	Year of Publication : 2015
	Authors : S.Anusha, N.Jayanthi

Citation

S.Anusha, N.Jayanthi "Spectrum Sensing and Allocation of Cognitive Radio Networks". International Journal of P2P Network Trends and Technology (IJPTT), V5(6):10-14 Nov - Dec 2015, ISSN:2249-2615, www.ijpttjournal.org. Published by Seventh Sense Research Group.

Abstract

Cognitive Radio Networks enable efficient spectrum sharing between licensed primary users (PUs) and unlicensed secondary users (SUs). Secondary users do not generate interferences to the primary users. Secondary users should have capability of knowing the real time spectrum usage of primary users. The knowledge can be acquired in many ways, one of which is spectrum sensing. In existing spectrum sensing methods, known distribution of the received primary signals are assumed. Proposed Spectrum sensing algorithm is designed under the distribution uncertainty of primary signals. Sensing algorithm is decomposed into a series of semi definite programs. Optimal decision threshold is designed at local detector of secondary user. Iterative algorithm is used to search the licensed spectrum for secondary users.

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Keywords
Cognitive radio network, licensed spectrum, unlicensed spectrum, spectrum sensing, decision threshold.