spectrum sensing in cognitive radio.

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sidhdhi jariwala

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hi.. every one..
actualy i am working on. spectrum sensing in cognitive radio..
and i want to plot pd vs pfa and improve snr.. in awgn channel..
can any one help me how to implement in matlab..?ya any one have some ref code?
i also trying but i am not getting perfact flow..


plz.. any one have a little bit idea plz.suggest me..
thank u in advance...
 

I have some knowledge in this area, but your question is very unclear. Start with Google, then maybe try asking a question here once you understand what you are trying to do.
 
hello..
my work is spectrum sensing in cognitive radio..
can i ask u wat u know in cognitive radio?
ya fir in CR how much information u know?means wat is your research area?...
i want to know. how i implement energy detection and matched filter technic of cognitive radio in matlab..
plz. give me some idea or suggestion.

thanks a lot in advance...
 

I am not an expert in cognitive radio, but have worked (and have a PhD) in related areas. I think you will get more help if you can ask more specific questions. If you can't, then I'm afraid you just have to do some reading. Try to find review papers that cover the main concepts concisely.
 

i want to implement energy detection for spectrum sensing in cognitive radio in matlab..
and i confused how i start thecode.
i have just rough idea for coding.
so i want to make my way clear for code.


ok// tell me how i defined signal in matlab. coz after that i have to take fft for geting in frequency domain.
 
Last edited:

hello sir.. i want to implement energy detection method..
can you help me how i can find threshold? for detection for theoritically value as well as simulation results?

please replay me.

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hello sir.. i want to implement energy detection method..
can you help me how i can find threshold? for detection for theoritically value as well as simulation results?

please replay me.
 

You need to be more specific. The term "detection threshold" is extremely general and has many different meanings in different areas of signal processing. The word "detection" has many different meanings. Please give your exact definition of detection. A whole chapter of my PhD was related to detection thresholds, but it may be a different type to what you are interested in.

If you want help with Matlab code, please copy it into this thread and describe exactly what you are trying to do. I will then help you to get it right.
 
Dear Weeta,

can any one help me with the code of Cooperative spectrum sensing(energy detection) in cognitive by using stochastic resonance.

thanks
 

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