Howtosignalprocessing
- What does windowing do to a signal?
- Which method in windowing has the least amount of distortion?
- What is the main role of windowing function?
- Which window function provide better frequency resolution?
What does windowing do to a signal?
Windowing changes the shape of the signal in the time domain, as well as affecting the spectrum that you see. The following figure shows convolving the original spectrum of a signal with the spectrum of a smoothing window. Even if you do not apply a smoothing window to a signal, a windowing effect still occurs.
Which method in windowing has the least amount of distortion?
The rectangular window is the optimal choice if the user can choose a window length with no signal discontinuities. This window does not distort the spectral representation of the signal when there are no discontinuities.
What is the main role of windowing function?
A window function performs a calculation across a set of table rows that are somehow related to the current row. This is comparable to the type of calculation that can be done with an aggregate function.
Which window function provide better frequency resolution?
Hanning is the most commonly used window function for random signals because it provides good frequency resolution and leakage protection with fair amplitude accuracy.
