The rapid growth of wireless applications has increases the importance for efficient utilization of the scarce spectrum resources. Cognitive Radio Network (CRN) is an emerging technology which leads to solve these problems through dynamic utilization of the unused licensed spectrum. Spectrum sensing is a key function of cognitive radio to find the spectrum holes and Collaborative or cooperative...

Maritime cognitive radio networks (MCRNs) have recently been proposed for opportunistic utilization of the licensed band. Spectrum sensing is one of the key issues for the successful deployment of the MCRNs. The maritime environment is unique in terms of radio wave propagation over water, surface reflection and wave occlusions. In order to deal with the challenging maritime environment, we prop...

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 ...

Rapid growth of wireless communication and limited spectrum availability to support the applications and services, has led to the development of cognitive radio as promising solution to address the problem of spectrum scarcity. Spectrum sensing is one of the fundamental functions towards the implementation of the cognitive radio concept in wireless communication. In this paper, we present an ad...

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...