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fft and complex number operation for dlarray?

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andyFan
andyFan 2020-11-15
评论： Aditya Patil 2021-9-16
Is there any ways to do complex number and fft operations for dlarray?
I'm trying to use auto differentiation to calculate the gradient of a mse loss function.
init_phase = 2*pi*rand(1080,1080)-pi;
phase = dlarray(init_phase,'SS');
in_complex_field = ones(size(phase,1,2)).*exp(1j.*phase);
target_amp = im2double(imread('1,bmp'));
out_complex_field = fft2(ifftshift(in_complex_field));
out_amp = abs(out_complex_field).^2;
mse_val = mse(out_amp, target_amp);
grad = dlgradient(mse_val,phase);
Although I could do basic complex number operations with separable real and imaginary parts,
[real,imag] = polar_to_rect(ones(size(phase,1,2)),phase);
in_complex_field = cat(3,real,imag);
is there any ways that I could do fft2 operation with dlarray?

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Aditya Patil
Aditya Patil 2020-11-18
As of now, fft does not support dlarray. This is an known issue, and it might get fixed in any upcoming release.

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