Real

Why some FFT return complex array, some - mirrored real array?
Why is FFT output mirrored?Is the FFT of a real signal real?Why is FFT two sided?What are the real and imaginary parts of FFT? Why is FFT output mir...
KLT vs DCT basis restriction error
Is DCT better than DFT?Why DCT is used instead of DFT?What is a DCT basis?Is DCT The real part of DFT? Is DCT better than DFT?This is why DCTs...gen...
DCT vs DFT why do we need/want phase?
Why use DCT instead of DFT?What is the main difference between DCT and DFT?Is DCT better than DFT?What is phase DFT? Why use DCT instead of DFT?>...
What are real-valued and complex signals and why is the Fourier transform of a real-valued signal Hermitian?
What is the real-valued signal what is the complex valued signal?What are real and complex signals?What are the real and imaginary parts of the Fouri...
What symmetry does system function H(z) have if h[n] is real?
What is the real part of conjugate symmetric signal?What is the Z transform H Z of the impulse response of this filter? What is the real part of con...
Why MATLAB fft cos makes imaginary parts?
What do the real and imaginary parts of FFT represent?Why is the FFT symmetric around the middle?What is the complex part of a Fourier transform?Why ...
Real and imaginary part of signal after fft
What do the real and imaginary parts of FFT represent?What is the imaginary part of a Fourier transform mean?Is the FFT of a real signal real?What ar...
How to calculate DFT of signal which occurs from 3 to 8?
Which sequences has a real valued 8 point DFT? Which sequences has a real valued 8 point DFT?The first points of 8-point DFT of real valued sequence...
Signification of alternating signs of imaginary and real part of an FFT
What does the real and imaginary parts of the FFT signify?Is the FFT of a real signal real?What is the complex part of a Fourier transform? What doe...