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mmWave target observation

Shankar Jayagopi
Prodigy 80 points
Other Parts Discussed in Thread: AWR1642BOOST, AWR1843, AWR1642

Hi, 

We have an unique requirement to be showcased with TI mmWave evaluation kit. 

There is a need to setup a mmWave radar that continuously looks for a target (corner reflector) at 15m distance and at angle (90 deg) exactly straight/perpendicular to it. 

We need to raise an alarm any time we miss seeing that target. We don't really need to interpret anything else in the view of the radar, hopefully reducing the processing power required. 

(We are implementing something similar to infrared laser beam breaking, except using mmWave)

Which development kit would be useful for this purpose, and any guidance on how to implement this? 

regards

Shankar

  • 0
    TI__Guru 69970 points
    Hi Shankar,
    Each of mmWave sensor is capable of looking at this range (15m) and front angle.
    Selection of mmWave device depends on different aspects
    1. What is frequency band allowed for this usecase in that region/country? Based on this answer you can select either 77Ghz or 60GHz mmWave Sesnsor.
    2. Does this usecase require automotive lavel of safety? If yes then choose AWR1xxx else IWR1xxx device.
    3. Do you require a DSP on chip, as it provides more flexibility and features? Then use xWR1642 device.

    Regards,
    Jitendra
  • 0 in reply to Jitendra Gupta
    Prodigy 80 points
    Hi Jitendra,

    1. We are based in Ireland. We are hoping to use 77GHz.
    2. yes, it needs to, so probably AWR series.
    3. This is the feedback i wanted to ask. For this specific usecase i am not sure if our development would be easy to use DSP, and work on the list of objects to filter for this interested target or should we have some sort of analog BP Filter circuit connected to the radar front end that looks for a specific frequency with specific amplitude?

    regards
    Shankar
  • 0 in reply to Shankar Jayagopi
    TI__Guru*** 149044 points
    Hi,

    The antennae we have available on our EVMs do not have a Field Of View large enough to cover +90deg.

    You would need a customer board with custom antenna for this application

    thank you
    Cesar
  • 0 in reply to Cesar
    Prodigy 80 points

    Hi Cesar, 

    Sorry, not 90deg. its 0 deg. 
    The target is straight ahead from the radar. 

    regards

    Shankar

  • 0 in reply to Shankar Jayagopi
    TI__Guru*** 149044 points

    Hi,

    At 0deg you will be able to detect the a corner reflector.

    You also have to consider what type of object will be placed between the radar and the corner reflector. Since this object will also be detected by the mmwave sensor (at a different range)

    In order to experiment you should use the AWR1642BOOST EVM. This will give you the flexibility needed for this project

    thank you

    Cesar

  • 0 in reply to Cesar
    Prodigy 80 points
    Hi,

    We are expecting the radar to be placed on one side of the road, and the reflector on the other side.
    So we can expect vehicles upto 120kmph going between these two. We want to identify vehicles that are above/taller a specific height clearance, which results in the target corner reflector from either going away from the radar's view or atleast a decrease in reflected energy.

    regards
    Shankar
  • 0 in reply to Shankar Jayagopi
    TI__Guru 69970 points

    Hi Shankar,
    In case your use-case requires elevation and more power then you can use AWR1843 with 3 Tx antenna and you can design the antenna to cover the elevation part of your use-case.
    If AWR1642 power is sufficient then AWR1642ODS provides an elevation antenna which you can try under your scenario.

    And under the above-mentioned scenario, the device can look for other objects apart from reflector which will provide information about whole environment containing moving vehicles (at high speed: the device can view vehicles running up to 120Kmph).

    At the last, I would recommend having a look for multiple applications available at TI-Rex which will fill you up with device's capabilities to cover up your use-case.
    dev.ti.com/.../ (people counting, traffic monitoring etc.)
    dev.ti.com/.../ (SRR, MSS etc.)


    Regards,
    Jitendra

  • 0 in reply to Jitendra Gupta
    Prodigy 80 points

    Hi Jitendra, 


    Thanks for your response. 

    Yes, with MIMO support, AWR1843 should increase the angular estimate and resolution.

    if we have better Azimuth resolution than Elevation, we will probably just till the radar plan 90 deg to use the Azimuth as Elevation. 

    We will try to procure a development kit for the same to test it. 

    regards

    Shankar