Android Question Advice on FFT using IQ samples

[Jack Howard]

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

 

[klaus]

Also is the FFT a complex fft or real fft

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