Howtosignalprocessing
Does - page 2
In case of Complex DFT spectrum, why the x axis range from N/2 to N point mean a negative frequency?
Why does FFT have negative frequencies?Why is FFT mirrored?What does the amplitude of FFT mean?How do you find the frequency spectrum of a signal? W...
What does the phase discriminator portion of the Costas Receiver do mathematically?
What does the phase discriminator portion of the Costas Receiver do mathematically? It does this by comparing the two the quadrature low-pass filter o...
What does opencv 'mean' function do when passing a mask of zeros?
How does masking work in OpenCV?What does cv mean in OpenCV?What does cv2 mean return? How does masking work in OpenCV?Masking of images using Pytho...
Quadrature demodulation, homodyne detection, lock-in detection - what's the difference?
How does quadrature demodulation work?How does homodyne detection work?How does lock-in detection work?What is the purpose of lock-in amplifier? How...
When Is a Power of 2 FFT Slower than Smaller Sized Non Power of 2 FFT in MATLAB
Does FFT have to be power of 2?How does FFT improve the speed of computation?Why is FFT faster? Does FFT have to be power of 2?Sure, you can use a r...
Properly interpreting FFT output
What does the output of FFT mean?What does an FFT plot tell us? What does the output of FFT mean?These frequencies actually represent the frequencie...
How does a Hermitian FFT work in Numpy?
How does Numpy FFT work?How does FFT work in Python?What does Numpy FFT Fftfreq do? How does Numpy FFT work?The fft function which uses the function...
How does 'envelope' use the sliding window to determine RMS in MATLAB?
How does Matlab calculate RMS?What does envelope do in Matlab?How do you calculate moving RMS? How does Matlab calculate RMS?y = rms(x,1) computes t...
PSDs and Parseval's theorem
What does parseval's theorem tell us?What is PSD and CSD?What is PSD in AFM?What does a PSD plot show? What does parseval's theorem tell us?Parseval...