Preamble for doppler shift estimation

1. How do you measure Doppler shift?
2. What is the principle of the Doppler shift?
3. How do you use the Doppler shift equation?

How do you measure Doppler shift?

The Doppler shift can be determined after performing the range Fourier transform (range FFT) first. For a target of interest, we can repeat the range FFT until we have enough data to perform the second level of FFT.

What is the principle of the Doppler shift?

Doppler Principle

The Doppler effect, described in 1842 by Christian Andreas Doppler, is the change or shift in the frequency or wavelength of a wave due to relative movement between an emitting or reflected sound source and the receiver.

How do you use the Doppler shift equation?

fo=fs(v±vov), where f_o is the observed frequency, f_s is the source frequency, v is the speed of sound, v_o is the speed of the observer, the top sign is for the observer approaching the source and the bottom sign is for the observer departing from the source. Equation 17.8.