Does a phase rotation introduce a delay?

1. What causes group delay?
2. What is a phase rotation?
3. What is phase delay in a filter?
4. What is the difference between phase delay and group delay?

What causes group delay?

In signal processing, group delay and phase delay are delay times experienced by a signal's various frequency components when the signal passes through a linear time-invariant system (LTI), such as a microphone, coaxial cable, amplifier, loudspeaker, telecommunications system or ethernet cable.

What is a phase rotation?

Phase rotation, or phase sequence, is the order in which the voltage waveforms of a polyphase AC source reach their respective peaks. For a three-phase system, there are only two possible phase sequences: 1-2-3 and 3-2-1, corresponding to the two possible directions of alternator rotation.

What is phase delay in a filter?

The phase response of an LTI filter gives the radian phase shift added to the phase of each sinusoidal component of the input signal. It is often more intuitive to consider instead the phase delay, defined as. The phase delay gives the time delay in seconds experienced by each sinusoidal component of the input signal.

What is the difference between phase delay and group delay?

A signal can contain multiple sinusoidal components. The time delay of amplitude envelopes of these sinusoidal components is called group delay, whereas, The time delay of phase of various sinusoidal components present in a signal is called Phase delay.