Doppler Velocity from I&Q channel
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I am new to this field and struggling to find doppler velocity from pure Doppler RADAR. I have I&Q channel, which I beleive is used to find doppler velocity by finding their phase difference ? Any sort of help would be much appreciated
4 个评论
Aicha Sow
2021-8-12
Hi @Muhammad Fayyaz I was indeed hoping for another answear. But thanks for taking the time to reply.
回答(3 个)
Honglei Chen
2018-8-20
There is a Doppler estimation example in Phased Array System Toolbox. You can find it at
HTH
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Honglei Chen
2018-8-20
编辑:Honglei Chen
2018-8-20
In that case the following example may be helpful
HTH
Honglei Chen
2018-8-20
If you are using a pure CW system, you cannot derive the range information. In that case you just mix the received signal with the transmitted signal, like what is done for range in the FMCW radar example. However, this time all frequency shifts are caused by Doppler shift. So just as shown in the FMCW radar example, once you get the beat frequency, that is your Doppler shift and you can then translate that to speed.
HTH
2 个评论
Honglei Chen
2018-8-20
If you have FFT output, you can just locate the peak and get the corresponding frequency. To translate that frequency to speed, you can use dop2spped
Note that this is for one way propagation. Since you are using a radar, you probably have two way propagation so you need to divide the result by 2 to get the correct speed.
HTH
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