• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 268 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DCA1000EVM: range calculation

Writer Yuan
Prodigy 100 points
Part Number: DCA1000EVM

Hi,

I use mmwave studio 2.1.1.0 to capture raw data from DCA1000 and IWR6843IWK,the process is as follows，and calculated range resolution is about 5.9cm

And I placed my laptop 36.5cm (about 7.5 * range resolution）away from the radar。

theoretically，In theory, rangebin7 should have stronger power

But I get this range_profile，why is this？

  • 0
    TI__Mastermind 20605 points

    Hi Yuan,

    There are few things to consider here:

    • Due to the nature of FFT, it will not be able to accurately represent the frequency corresponding to the exact range due to limited resolution in the frequency domain.
    • There will also exist some leakage of energy into the neighboring bins which can be mitigated with windowing before applying the FFT. 
    • The point of reflection from the strongest RCS on your laptop might also be at a slightly different range when compared to what you have measured.

    Based on this, you should be able to change some configuration such as FFT size, apply a window and obtain a more accurate range FFT. You can also use a corner reflector to fix your point of reference with lesser error.

    Regards,

    Kaushik