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  1. kjiang

    Doppler Shift in 2D

    Quick question. From https://en.wikipedia.org/wiki/Doppler_radar “This variation of frequency also depends on the direction the wave source is moving with respect to the observer; it is maximum when the source is moving directly toward or away from the observer and diminishes with increasing...
  2. kjiang

    Chirp or Pure Tone?

    Furthermore, once the sound wave hits the object, (it will reflect of course) and returns to the receiver, the hypothetical equation from m previous post (let's hope it exists) will only be a measurement of the distance of the object at the instance the sound wave hits the object. Not the final...
  3. kjiang

    Chirp or Pure Tone?

    If the object weren't moving then the frequency vs time graph would simply be a horizontal line followed by a time delay then another identical horizontal line. (Assume I'm using a pure tone) The phase difference in the frequency time domain gives me the difference in time (time delay) and...
  4. kjiang

    Chirp or Pure Tone?

    I should have made my question more clear. Sorry. I am using a sound generator that emits a frequency of 21 kHz. By measuring the change in frequency of the object (whether it be moving toward or away in a linear path directed along the path of the source) one can determine the speed of that...
  5. kjiang

    Chirp or Pure Tone?

    Hello, I was wondering whether to use a linear chirp or a single frequency in measuring the doppler shift. We are using a monostatic setup and are emitting a frequency of 21k. Standard radar practices say to use a linear chirp instead of a pure tone. Why is that? Thanks

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