0
$\begingroup$

I'm trying to figure out how a continuous wave Doppler radar works. When moving towards the radar, the Doppler frequency should increase, and when moving away from the radar, the frequency should decrease. I am using a microwave module at a frequency of 24 GHz. At "output I" I see a change in frequency depending on the speed of movement, but regardless of the direction of movement I will see the same frequency. The frequency varies only depending on the speed of movement. If I understand correctly, the movement in the direction from the radar is in the region of negative frequencies? If I want to split the direction of motion, then I should shift the signal to the right by multiplying the original signal by sin and cos?

I’m also interested in how to reduce the signal-to-noise ratio? Now I did it this way: I know that the movement speeds I need are in the range of 0.2-6m/s, which corresponds to a frequency of 32-966Hz. I broke down this range using bandpass filters 0-100, 100-200, 200-300, etc. The signal-to-noise ratio obtained in each range is better than when using the entire range of 32-966Hz. Are there any other solutions to improve the signal-to-noise ratio?

$\endgroup$
1
  • $\begingroup$ "At 'output I' I see..." Output I of what? Different authors (or products) will use different terminologies. Please edit your question to cite your sources, or, if you're using a physical product, to tell us what the product is. Including a relevant and small quote of your source may be wise. $\endgroup$
    – TimWescott
    Feb 17 at 17:05

0

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Browse other questions tagged or ask your own question.