[Help]Radar Sensor maximum range problem!

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User14964
Level 1
Level 1
5 questions asked 10 sign-ins 5 replies posted
Hi everybody,
I have a question about the maximum distance measured. I know when the scan time (Tsweep) is 1ms, 64 samples per chirp, and BW is 200Mhz we will have Fs = 64000. However, does the maximum beat frequency follow the Nyquist theorem? And if obeyed, the maximum distance is only 24 (meter) rather than 48 (meter). Your maximum distance calculation (ParseRawDataFile) is 48 (meter). Can someone explain it to me?
Thank!
H.Minh
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User8734
Level 4
Level 4
We are talking about FMCW radar, rifght? Usig FFT aftewords? 7500 GHz chirp gives you 2 cm resolution, 200 MHz sweep -> 75 cm.
After FFT, 64 points chirp provides you 32 samples by distance, 32*0,75 =24 meters.

K.
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