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AWR1843: AWR1843 doppler index into velocity

Rajesh Dubey
Prodigy 250 points
Part Number: AWR1843

Hello All, I want to calculate velocity of the objects from doppler index. How can i do that? 

  • 0
    TI__Genius 15046 points

    Hi Rajesh,

    Welcome to the E2E community!

    The answer you are looking for can be found in detail for the out of box demo here: <SDK_INSTALL_LOC>\packages\ti\demo\utils\mmwdemo_rfparser.c

    This source file computes various such values for the out of box demo.

    See the outParams->dopplerStep value. From the corresponding .h file: 

    This is exactly the mapping from doppler index to velocity that you are looking for.
    If you want to get an idea of the theoretical foundation for this expression, I would recommend looking at "Introduction to mmwave Sensing: FMCW Radars" videos (link to videos, link to slides) and "The fundamentals of millimeter wave sensors" appnote (link)
    Regards,
    Aayush