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Cognitive Radio Technology (CRT)

Cognitive Radio Technology (CRT)

What is CRT?

CRT is an intelligent radio technology which will detect unused spectrums/channels in the current spectrum range. It’s an exciting and new way of thinking and researching about wireless technologies. 
Why CRT is important?
Example when you take FM radio spectrum, only some channels such as 93.4MHz or 99.8MHz is used, all other frequency range is unused. These frequency channels can be used for transmission. The unused spectrum is mentioned as “Spectrum Holes”.

In this technology transceiver works as a smart/intelligent device which detects what spectrum are in use and what spectrum is not in use. This optimizes the use of available radio-frequency (RF) spectrum. It’s a radio that can change its transmitter parameters based on interaction with the environment in which it operates. If some spectrum is not used, CRT enables to use that spectrum efficiently.

There are two main types of cognitive radio, full cognitive radio and spectrum-sensing cognitive radio. Full cognitive radio considers all parameters that a wireless node or network can be aware of. Spectrum-sensing cognitive radio is used to detect channels in the radio frequency spectrum.

Below mentioned are the functions of cognitive radio.
These are four main steps in CRT i.e. Spectrum sensing, Spectrum management, Spectrum mobility and Spectrum sharing.

Thank you for reading this article, I will be sharing more information on CRT in upcoming articles.

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