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Calculating FFTs

Oscar Carrasco Quilis
Prodigy 80 points

Hi,

I need to calculate some FFTs using the FFTC coprocessor. Looking at the example projectsd I have noticed that they calculate the FFT over a set of values stored on a header file. However, I would like to program an OFDM transmitter, so the input values have to be variable.

Is it possible to do this?

Thank you.

  • 0
    TI__Mastermind 30825 points

    The header file is only a convenient way for the example to have the data placed into memory.  As far as the code see this it's only a data array, and then you setup your transfer of the data in memory into  Simply store the data in the memory, and setup the transfers just as is done in the example, but you use the location of where you've stored the data into memory.

    Best Regards,

    Chad

  • 0 in reply to Chad Courtney
    Prodigy 10 points

    Hi,

    I saw the last question puts the nail on the head. My company is developing an LTE transceiver (FBOX) and have the same problem in order to perform the FFT of the OFDM with variable values​​. Everything is ready except this obstacle. Is this doubt alredy resolved?

    Best regards,

    F. Béjart

  • 0 in reply to consultant
    TI__Mastermind 30825 points

    Francois, what obstacle and doubts are you referring to?  I can try to read between the lines, but I'm afraid, I'd only misinterpret this?   There's nothing magical and I know of no obstacles.  The above answer to the thread posters question, wasn't telling him how to get around an obstacle, but more of a fundamental understanding of using processors and building code.

    Best Regards,

    Chad