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Demodulating an analog FM signal

Amir Borna
Prodigy 10 points

Hello,

I was wondering how I can demodulate an analog FM signal centered at 433MHz with a 6MHz BW, using one of TI microcontrollers. Thank you very much.

 

Regards,

Amir Borna.

 

  • 0
    Guru 227245 points

    HF demodulation isn't done with a microcontroller. Even if oyu have a controller that's fast enough to deal with this (in the GHz range), it would be a waste of CPU power.
    There might be DSPs which can be abused to do this, but usually, you demodulate the HF signal with an external analog circuit. There are plenty of HF decoder chips out there.

    The ADCs in the MSP series go to 250kHz sampling rate, for 12 bit and some 30kHz for 16 bit, so if your demodulated signal is in this range, you can use one to sample and process it.
    And there's the more powerful (yet mor power-.consuming) Stellaris series. And others too. I can only speak for the MSP430s

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