Android Question Advice on FFT using IQ samples

Discussion in 'Android Questions' started by Jack Howard, Feb 12, 2018.

  1. Jack Howard

    Jack Howard Member Licensed User

    Advice on FFT using IQ samples

    I have seen Klaus excellent examples, but I am new to FFT, so forgive me for the basic question.

    I have live IQ samples from a Radio Receiver via the Android USB port, and I would like to see the RF spectrum.

    I realise that I could reconstruct the voltage using SQRT of I2+Q2

    Then feed it in FFT1.Transform like the Audio examples.

    Is there a better way to use the I and Q data with

    TimeAmplitude, the time domain amplitude, your array
    FFTReal, the real componants of the FFT
    FFTImag, the imaginary componants of the FFT

    or even
    FFTAmpl
    FFTPhase

    Also is the FFT a complex fft or real fft
    '''''''''''''''''''''''''''''''
    IQ
    In-phase Quadrature.
    Used to denote the complex format on which the RF data is
     
  2. klaus

    klaus Expert Licensed User

    Currently no.
    I have no experience in RF data nor In-phase Quadrature.
     
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