• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 31 subscribers
  • Views 496 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.

IWR1443BOOST: IWR1443BOOST

peter mccormick
Expert 1110 points
Part Number: IWR1443BOOST

Re: high accuracy lab

I understand part of the reason for multiple receive antennas so you can get angle.  Why do your have multiple transmit antennas?

Per your tutorials:
S=4Ghz/40µS=100Mhz/µs=100e12
d=fc/2S=f*(3e8)/(2*100e12)=f*1.5e-6
The distance "accuracy" (i.e. <1mm) I think is 1/T where T=chirp time=40uS 1/T==25kHz
 d=25e3 * 1.5e-6=.0375m=37mm which is >>1mm

Obviously, my math must be incorrect??

Thanks, Peter

  • 0
    TI__Guru 50240 points
    Hi Peter,

    I've asked our High Accuracy Expert to look into this and we should have an answer for you on Monday.


    Cheers,
    Akash
  • 0 in reply to Akash Gondalia
    TI__Genius 11405 points
    Hi Peter,

    Multiple tx antennas and rx antennas give a matrix of virtual antennas -- determining angle resolution. About MIMO, you can refer to the file: www.ti.com/.../swra554.pdf

    As to your 2nd question, you may confuse between resolution and accuracy. Resolution -- the min distance to tell two objects apart-- is decided by sweeping bandwidth. Accuracy is how measurement is close to the true value. In high accuracy lab, accuracy is improved by zoom-in fft.

    Hope this clears things up.

    Thanks and Regards,
    Michelle