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AWR1642: question about CLI command and scene parameters

monica
Intellectual 340 points
Part Number: AWR1642
Other Parts Discussed in Thread: MMWAVE-SDK

Hi,

    I have studyed the FMCW and mmWave radar technology through the videos provided in  mmWave Training Series, but I still have some questiona when I read the  MMWave Demo Visualizer User's Guide.

  

   As shown in the picture above, In 2.6.2 section once range resolution is seclected, the sweep bandwidth should be determined acording  the formula  （d_res=c/2B ）,but in the documenr the frequency slope and ranp end time are defined, I think we can only ensure the product of frequency  slope and ramp end time acording the formula ( frequency slope=sweep bandwidth/ramp end time）,becaus we only know one of the three variables in a formula so far. So I want to know  how to calculate the frequency slope and ramp end time  simultaneously according to the sweep bandwidth?

  Is there any mistake in my understanding? I hope I can get your help.

Thanks ,

Monica

  • 0
    TI__Guru 69960 points
    Hello Monica,
    Your understanding is correct about the formulae to find out bandwidth (B).
    But profileCfg CLI command frequency slope constant and Ramp end time are known and provided by user. And in the same command you will find parameter for start Frequency (startFreq) which is known for same CLI command.
    So, using this formula you can find out bandwidth (= freqSlopeConst * rampEndTime).

    Hope this clearifies your doubt. For detailed info about CLI commands please refer mmWave SDK User Guide document available in mmWave-SDK installation.



    Regards,
    Jitendra