25-08-2017, 09:32 PM
dynamic spectrum management
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INTRODUCTION
A Technique of utilising unused spectrums to communicate efficiently for secondary(unlicensed) users without interfering primary(licensed)users.
It is a tranciever which detects the available channels in wireless spectrum.
This process is also known as dynamic spectrum management
FUNCTIONS
Spectrum sensing
Power control
Spectrum management
SPECTRUM SENSING IN COGNITIVE RADIO
It is a technique to recognise unused spectrum which is a key function of cognitive radio. It requires fast signal processing techniques
Spectrum sensing involves the following tasks:
detection of spectrum holes
spectrum resolution of each spectral hole
estimation of spatial direction
signal classification