How to get rid of the complex part from the result of the inverse Fourier transform of a real-valued signal?

Question

Massilon Toniolo da Silva 2017-6-15

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https://ww2.mathworks.cn/matlabcentral/answers/344876-how-to-get-rid-of-the-complex-part-from-the-result-of-the-inverse-fourier-transform-of-a-real-valued

回答： Star Strider 2017-6-15

After applying the inverse Fourier transform to real-valued signal I have got , as expected, complex numbers. But, I would like only the real part of the result to form the signal. Could someone give some help in this matter? Many thanks, Massilon.

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Answer 1

Adam 2017-6-15

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在 MATLAB Online 中打开

result = real( ifft( ... ) );

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Answer 2

Star Strider 2017-6-15

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Just taking the real part of your transformed data eliminates half of it. I would use the abs function instead (that uses the real and imaginary parts of your transformed data), if you want only real results.