Bhawna Ahuja

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In this paper, we present a novel two stage detector for spectrum sensing using fuzzy logic. The first stage consists of classical Energy detector which is preferred approach because of its simplicity. However its performance decreases at low SNR. Hence, second stage consisting of Fuzzy logic Detectoris invoked, if detection is failed by first stage.(More)
The wide proliferation of wireless digital communication services and spectrum scarcity has led to the development of cognitive radio. They can tackle both scarcity as well as growing demand. For efficient utilization of the spectrum, it permits unlicensed users to exploit licensed bands when they are idle. Since licensees are preferred, so the unlicensed(More)
The Cognitive Radio is a most authentic solution for the spectrum scarcity as there is rapid growth in wireless communication and spectrum is very limited. The main and key function of cognitive radio is to sense the idle spectrum which can be used for by secondary users in opportunistic manner. A number of techniques are proposed by various researchers.(More)
Surveillance systems are aimed at providing security and for keeping a vigilant eye on all events. Such systems can be enhanced if they have the capability to capture surrounding sound and motion. Also, these systems can be made more efficient by implementing such ideas on a robot which can move from one place to another. Such a system can be used for(More)
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