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Demodulation and ADC sampling rate

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mdkn83

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Hi !

I'm quite a newbie in terms of DS processing.
However, I'd like to know if there's a relationship between ADC sampling rate and demodulation.
I'm working on HF channels (3-kHz wide channels modulated on the 2-30 MHz band) transmitting data.
Could someone point me out to a tutorial or explain me what I can do ?

Currently, I have I-Q samples recorded over a 24 kHz band centered on my receive frequency which I'd like to demodulate ?
I have the code to demodulate it, but shouldn't I also filter out what's between -24/-1.5 kHz and +1.5kHz/+24KHz ?

Thanks a lot
 

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