Phase Response
Definition. The phase responseof an LTI filter is defined as the phase (or angle) of the frequency response
:
![$\displaystyle \zbox {\Theta(\omega) \isdefs \angle H(e^{j\omega T})}
$](http://www.dsprelated.com/josimages_new/filters/img843.png)
The real-valued phase response
gives the phase
shift in radians that each input component sinusoid will undergo.
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Polar Form of the Frequency Response
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Amplitude Response