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Erschienen in:
2015 | OriginalPaper | Buchkapitel
14. An Improved Energy Detector for Spectrum Sensing in Cognitive Radio System with Adaptive Noise Cancellation and Adaptive Threshold
verfasst von : Aritra Das, Bhaswati Chatterjee, Sandhya Pattanayak, Manisha Ojha
Erschienen in: Computational Advancement in Communication Circuits and Systems
Verlag: Springer India
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Abstract
Over the years the usage of wireless communication systems has increased rapidly leading to scarcity of bandwidth. Hence the concept of utilizing the existing system to its fullest has become very important. Cognitive radio is a technique based on this concept which identifies the unutilized white spaces in the spectrum, and are allotted to the secondary user in a non-interfering manner. The energy detection technique does not work at low SNR. In this paper we attempted to improve the efficiency by performing adaptive noise cancellation and adaptive threshold in the energy detector.