In a cognitive sensor network (CSN), the wastage of sensing time and energy is a challenge to cooperative spectrum sensing, when the number of cooperative cognitive nodes (CNs) becomes very large. In this paper, a novel wireless power transfer (WPT)-based weighed clustering cooperative spectrum sensing model is proposed, which divides all the CNs into several clusters, and then selects the most...

Cognitive Radio (CR) is a self-monitoring wireless communication system. It can utilize the radio frequency spectrum efficiently. The CR user can opportunistically use those idle spectrum bands without causing harmful interference to the licensed/primary user. There are several spectrum sensing techniques which can serve the purpose. In this paper, non-cooperative spectrum sensing is performed ...

Cooperative spectrum sensing has been proven to improve sensing performance of cognitive users in presence of spectral diversity. For multi-channel CRN (MC-CRN), designing a cooperative spectrum sensing scheme becomes quite challenging as it needs an optimal sensing scheduling scheme, which schedules cognitive users to different channels such that a good balance between detection performance an...

Spectrum sensing plays a major role in the cognitive radio networks. An effective spectrum sensing has two fold utility: one hand it prevents primary users or licensed users for significant harmful interference from secondary users or unlicensed users and on the other hand it increases the spectral efficiency. In this paper, a survey of the various spectrum sensing schemes such as transmitter s...

In this paper we have studied the threshold adaptation for energy based spectrum sensing in cognitive radio using non-linear optimization. Several methods to decide the threshold have been proposed in the literature such as fixed threshold, double threshold and adaptive threshold etc. Instead of using these methods to decide threshold in energy detection, an adaptive threshold has been proposed...

The Cooperative Spectrum sensing model is gaining importance among the cognitive radio network sharing groups. While crowd-sensing (technically cooperative spectrum sensing) has positive developments, one of critical challenges plaguing false or manipulated crowd sensor data, which results in implications for secondary user’s network. Considering efficacy by model, it vital to address issues fa...

Cognitive Radio allows opportunistic spectrum access (OSA) of licensed frequency bands by unlicensed users so as to reduce spectrum scarcity led by the increasing market demands. Spectrum sensing is an essential mechanism for a cognitive radio system. Therefore attention should be given towards the security aspects of spectrum sensing in cognitive radio. This paper analyses the two protocols me...