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Radio spectrum is the most valuable resource in wireless communication. The cognitive radio and cognitive based networking are transforming the static spectrum allocation based communication systems in to dynamic spectrum allocation. Cognitive radios are intelligent devices with ability to sense environmental conditions and can change its parameters(More)
Cognitive radio based network enables oppor-tunistic dynamic spectrum access by sensing, adopting and utilizing the unused portion of licensed spectrum bands. Cognitive radio is intelligent enough to adapt the communication parameters of the unused licensed spectrum. Spectrum sensing is one of the most important tasks of the cogni-tive radio cycle. In this(More)
the problem of spectrum scarcity becomes with the new devices and applications of wireless communication. The solution of this problem is the cognitive radio Networks. This paper presents the different scheduling techniques for the secondary user and evaluated the results of maximum throughput and optimal resource utilization based on evaluation results of(More)
—The idea of software defined radio was proposed by J. Mittola. It was a radio designed on programmable chips. The idea of SDR was further enhanced in the form of Cognitive radios. It was proposed by the J.Mittola for the solution of the Spectrum Scarcity problem. Cognitive Radio based networks have the two types of users. One type of the users is known as(More)
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