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AWR1642: Long Range Detection of Slow Moving Objects

Grant Rowberry
Prodigy 40 points
Part Number: AWR1642
Other Parts Discussed in Thread: AWR1243

I am trying to detect slow moving cow-sized objects in a range of 0-250m in a flat open space. We are currently trying to use the AWR1642 Boost.

My questions are:

  • Should I stick with the AWR1642? I have read elsewhere that the AWR1243 is probably better for long range. Should I switch?
  • I noticed on the mmWave Sensing Estimator that when I bump up my antenna gain I should be able to get a lot better range. How can I get more antenna gain?

Thanks for all your help

  • 0
    TI__Mastermind 24955 points
    Grant,

    If you are looking in the 250 meter range, AWR1243 might offer a better solution, but in a cascade solution.

    In this video shown below, we have an AWR1243 cascade solution that is capable of detecting a car at 250 meters and greater.

    www.youtube.com/watch

    A whitepaper discussing a cascade solution can provide more information on this subject and can be found here: www.ti.com/.../swra574a.pdf

    With regards to antenna gain, this is a function of the physical antenna pattern on your PCB. This would depend on the number of patches for each TX and RX antenna as well as the size and orientation of those patches. This is an external consideration and is not related to the AWR1642.

    Regards,
    Kyle
  • 0 in reply to Kyle Cousino
    Prodigy 40 points

    Kyle,

    Thanks for your response. How does a cascade solution help me achieve greater distance? Is it even possible for the AWR1642 to get that 200-250m range? What factors limit the AWR1642 on range that the AWR1243 has? Would you recommend that I switch from the AWR1642 to the AWR1243?

    Thanks,

    -Grant

  • 0 in reply to Grant Rowberry
    TI__Mastermind 24955 points
    Grant,

    As stated in the whitepaper that I provided in my previous post: "Cascading multiple such chips allows the radar system to operate with more receive and transmit antennas, thereby improving target detection and resolution in comparison with a single AWR1243 radar chip based system."

    A cascaded solution provides greater resolution at longer distances due to the increased number of TX and RX antennas. However, the AWR1642 is still capable of generating chirps for 200 meter distances.

    Please refer to page 7 of this whitepaper about configuring chirp parameters on mmWave devices: www.ti.com/.../swra553.pdf

    Please keep in mind that the AWR1642 is designed to be a standalone device, capable of performing its on processing of the received chirps. The AWR1243 device is purely a front end device and would require an external processor to process the received data.

    Regards,
    Kyle