# Tag Info

### Autocorrelation & Cross-Correlation -> Main uses in DSP??

In addition to the uses robert bristow-johnson (very well) provided, one can use cross-correlation to detect a (known) signal in noise. For more information on this use you can search for "...
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### Autocorrelation & Cross-Correlation -> Main uses in DSP??

In audio, I have used autocorrelation, or something like it, to accurately determine the period and fundamental frequency of a quasi-periodic audio signal; a musical note. Pitch detection I have used ...

### Finding phase shift using complex exponential

Two issues with your assumptions here. One in the way you are modeling the added phase and the other about he functioning of the atan2 function. You are modeling ...
1 vote

### Phase of an FFT after zeropadding

Given a sequence $x[n]$, the magnitude-phase representation of its DTFT (or samples of DTFT given by an N-point DFT/FFT) has the following form: $$X(\omega) = |X(\omega)| e^{j\phi(\omega)}$$ where \$|...
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Accepted

### Examples & Applications of Quadratic Phase Coupling

As is called out in your quoted section, any system that contains a quadratic non-linearity will exhibit a quadratic phase coupling phenomenon to some extent. If it is large enough to be measured is ...
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