how to apply hermitian symmetry on the complex value

how apply hermitian smmetry on the complex value to get real value like

a+bi

While keeping the length of fft constant

Answer 1

[Rajani Mishra]

One of the discrete-time Fourier transform properties is that if a sequence is conjugate symmetric, then the Fourier transform is real. If it is some small imaginary part due to numerical precisions, you can probably preprocess your input. For more understanding refer to this blog: https://blogs.mathworks.com/steve/2010/07/16/complex-surprises-from-fft/