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Translate axes of 2D FFT plot to frequency

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Poorva Limaye
Poorva Limaye 2017-1-13
评论： Adam 2017-1-13
I am plotting the 2D fft of a matrix using mesh function.The matrix is a data from 16 linear sweeps of a FMCW wave with each sweep data arranged in a column( that is ,no of columns=16). NFFT along column =2^15 and NFFT along row = 256. fft2 is computed as fft2(x,2^15,256).From the figure,the x axis can be translated to frequency using fs/N(-N/2:N/2+1). How to translate the y axis to frequency?
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Adam
Adam 2017-1-13
Why can't you just do the same along both axes, using the relevant NFFT for each?

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