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Spectrum Sensing in Cognitive Radio


Shubham Mungilwar , Atharva College of Engineering University of Mumbai, India; Khushal Singh Rathore, Atharva College of Engineering University of Mumbai, India; Devang Panchal, Atharva College of Engineering University of Mumbai, India; Vishal Goyal, Atharva College of Engineering University of Mumbai, India; Prof. Mohan Kumar, Atharva College of Engineering University of Mumbai, India


Spectrum Sensing, Cognitive Radio


During the last few decades, the severe shortage of radio spectrum has been the main motivation always used by researchers in the field of wireless communications. It has been believed that this shortage is mainly due to the physical scarcity of radio spectrum and to the rapid spread of diverse devices with wireless-interaction capability, such as mobile phones, laptop computers, home appliances, wireless tags, etc. Traditional and common approaches to solve this problem have been to increase the number of bits that can be transmitted per unit time and frequency, resulting in high capacity within a given frequency bandwidth. To this end, considerable research effort and fund have been spent to develop advanced wireless access technologies, and a lot of research is still ongoing all over the world. However, a recent report published by the federal communication commission (FCC) in US has shown a surprising finding, which highlights a different cause of the shortage of frequency resource: “In many bands, spectrum access is a more significant problem than physical scarcity of spectrum, in large part due to legacy command-and-control regulation that limits the ability of potential spectrum users to obtain such access”. Thus, the large part of the licensed spectrum is not utilized most of the time and space, and the frequency spectrum is actually abundant. Cognitive radio has been proposed as a means to achieve such dynamics. A cognitive radio senses the spectral environment over a wide frequency band and exploits this information to opportunistically provide wireless links that can best meet the demand of the user, but also of its radio environments. The cognitive-radio devices have two important functionalities: spectrum sensing and adaptation.

Other Details

Paper ID: NCTAAP058
Published in: Conference 4 : NCTAA 2016
Publication Date: 29/01/2016
Page(s): 248-251

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