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Original question:

IWR1642BOOST: Running Vital Sign Demo

IWR1642BOOST: How to extend the maximum operating range of the Vital Signs Demo

Jonathan Jones2
Intellectual 680 points
Part Number: IWR1642BOOST
Other Parts Discussed in Thread: AWR1642, AWR1243

Hi 

Can you let me know how to modify the AWR1642 Automotive Vital Signs Demo to operate at a range of 5~10m?

What parameters need to be changed in order to do this?

Thank you

Jonathan

http://dev.ti.com/tirex/#/?link=Software%2FmmWave%20Sensors%2FAutomotive%20Toolbox%2FLabs%2FDriver%20Vital%20Signs

  • 0
    TI__Guru*** 148514 points
    Changing parameters would not be sufficient.

    You would need a lens to increase the strength of received signal

    thank you
    Cesar
  • 0 in reply to Cesar
    Intellectual 680 points

    Hi Cesar

    Thank you for your quick reply.  

    When I analysed the IQ data from the AWR1243 I was able to detect breathing at 10m and so I don't think it is necessary to use a lense.

    I guess I wanted to know if it is possible to change the chirp parameters in this demo to e.g use 512 samples, averaging over multiple chirps, use different chirp ramp rates etc. ?

    Best regards

    Jonathan

  • 0 in reply to Jonathan Jones2
    TI__Mastermind 24955 points
    Jonathan,

    If you have not already, please take a look at the Developer's Guide for the Driver Vital Signs lab that is found here: dev.ti.com/.../

    Averaging an increased number of samples over multiple chirps would not help as this is not how the processing chain on this particular lab is implemented. The processing chain on this lab analyzes that phase differences from chirp to chirp. This is why this lab focuses on having a higher frame rate rather than having a greater number of chirps per frame. Additionally, the profile configuration used in this lab maximizes the the 4 GHz bandwidth to enable to smallest possible range resolution this is achievable on this device.

    Regards,
    Kyle