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BY:G. Ramakrishna Karthik Kumar,(13911D5502),ES(Mtech).

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 SDR is a radio communication system where

components that are used in hardware are instead

implemented by means of software on a personal

computer or embedded computing devices

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Novel approach for improving the radio electromagnetic spectrum.

Emerging technology in wireless access.

Built on a software-defined radio.

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Primary network (Licensed)and

Cognitive network (Not Licensed).

The basic elements of the primary and unlicensed

networks are

primary user

primary base station

cognitive radio user and

cognitive radio base station.

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A cognitive radio should monitor the available spectrum bands, capture their information, and then detect the spectrum holes.

It is a key enabling technology.

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Highly reliable communication

whenever and wherever needed, that is

mobility independent

Efficient utilization of the radio

spectrum.

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i. “Cognitive radio Technology” by BRUCE FETT

in the Communication Engineering Series

ii. “Cognitive radio for spectrum access” by LARS

BERMANN and STEPHAN MANGOLD

iii. “Cognitive Radio” from Wikepedia

iv. Between the primary and secondary bands,

based on the above models