Conitive Radio

A Cognitive Radio is a tuner that tummy change its transmitter parameters based on interaction with the surround in which it operates.

INTRODUCTION

Cognitive radio networks are intelligent networks that push aside automatically sense the environment and adapt the communication parameters accordingly. These typefaces of networks confirm applications in dynamic spectrum access, co-existence of different wireless networks, interference management, etc. They are touted to drive the next generation of devices, protocols and applications. Clearly, the cognitive radio network paradigm poses many new technical challenges in protocol design, power efficiency, spectrum management, spectrum detection,
environment awareness, new distributed algorithm design, distributed spectrum measurements, QoS guarantees, and security. Overcoming these issues becomes level more than challenging due to non-uniform spectrum and other radio resource allocation policies, economic considerations, the inherent transmission impairments of wireless connecters, and drug user mobility.

Cognitive radio is an emerging technology that enables the flexible victimisation and deployment of highly adaptive radios that are built upon software specify radio technology.





Cognitive radio has been considered as a signalise technology for future day wireless
communications and mobile computing. The cognitive radios foot form cognitive radio networks (CRN) by extending the radio link features to network layer functions and above. CRN architecture preserve be categorized into several structures and the unidirectional links in such structures can be classified.

BACKGROUND

The wireless communication systems are making the intonation from wireless telephony to interactive internet data and multi-media type of applications, for desired higher data rate transmission. As more and more devices go wireless, it is not hard to imagine that future technologies will face spectral crowding, and coexistence of wireless devices will be a major issue....If you want to get a complete essay, order it on our website: Orderessay



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