Howtosignalprocessing
The so-called “group delay” is simply the time lag between the envelope of input burst and the envelope of the amplitude of the output burst. So, group delay means a propagation delay through a filter, measured on the envelope of the signal.
- What causes group delay?
- What is the difference between phase delay and group delay?
- What is group delay in transmission line?
- How do you find the 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 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.
What is group delay in transmission line?
Group delay is defined as the rate of change of transmission phase angle with respect to frequency. The units work out to time when the angle is in radians and frequency is in radians/time (seconds, nanosecond, picosecond or whatever is convenient, depending on the length of the path).
How do you find the group delay?
τ g ( ω ) = - d θ ( ω ) d ω , where θ ( ω ) is the phase, or argument, of H ( e j ω ) . Use the grpdelay function to compute group delay of a filter. For example, verify that, for a linear-phase FIR filter, the group delay is one-half the filter order.
