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AWR1843BOOST: Medium Range Radar

Depeng Man
Intellectual 2030 points
Part Number: AWR1843BOOST

Hello Team,

I would like to design an ADAS application by modifying the medium range radar example provided by TI. 
I need to know where in the MRR source files to (adjust parameters)customize the angle of elevation and azimuth, the range of the obstacle to be detected and the velocity of the car on which the radar is placed and finally, where to indicate height of radar if it is placed on the roof of the car.
Thank you.
  • 0
    TI__Mastermind 20605 points

    Hi Depeng,

    Please go through the mrr_config files in radar_toolbox_1_00_00_26\source\ti\examples\ADAS\medium_range_radar\src\1843\common\

    If you want to know how to exactly tune these parameters to obtain different range or velocity, you can also give the following document a read.

    Programming Chirp Parameters in TI Radar Devices

    Once you have gone through these, let me know how I can support you further.

    Regards,

    Kaushik

  • 0 in reply to Kaushik Gowda
    TI__Intellectual 2030 points

    Hi Kaushik,

    I zeroed in on these two files in the common folder; 

    mrr_config_chirp_design_MRR80.h,
    mrr_config_consts.h,
    Please, where in these lines of these codes do I parametrized;
    Velocity of the car and the radar,
    Height of the radar when placed on the roof of car,
    Angle of elevation and azimuth.
    Thanks

    Best Regards

    James Man

  • 0 in reply to Depeng Man
    TI__Mastermind 20605 points

    Hi Depeng,

    The maximum velocity that can be picked up by the radar is a configurable parameter. You can refer to the document above to see what needs to be tuned accordingly. The velocity of the radar is not calculated in this iteration of the MRR example and the velocity of the objects detected will be relative to the sensor in nature.

    The radar mounting specifics are not taken into account for this example. This is something that will have to be done by the customer.

    With respect to the angle estimation, what do you want to modify?

    Regards,
    Kaushik

  • 0 in reply to Kaushik Gowda
    TI__Intellectual 2030 points

    Hi Kaushik,

    The maximum velocity that can be picked up by the radar is a configurable parameter. You can refer to the document above to see what needs to be tuned accordingly. The velocity of the radar is not calculated in this iteration of the MRR example and the velocity of the objects detected will be relative to the sensor in nature.

    Considering the radar equation, is it possible for a radar to determine the velocity of an object it's detected without reference to it's own velocity, in motion or motionless?

    The radar mounting specifics are not taken into account for this example. This is something that will have to be done by the customer.

    What do mean by radar mounting specifics? Regarding the radar equation still, I think the placement of the radar, usually center front grille of car, should certainly affect detection in this example. Kindly refer to the radar equation how it isn't taken into account in the MRR example.

    With respect to the angle estimation, what do you want to modify

    The angle of elevation should be steeper if the radar is placed higher on the roof of a car than in the front grille. 

    The azimuth of the detected object should be different if objects detected are located away from the midline of the car.

    Thank you for your time

    Best Regards

    James Man

  • 0 in reply to Depeng Man
    TI__Mastermind 20605 points

    Hi Depeng,

    Please find my responses as follows:

    Considering the radar equation, is it possible for a radar to determine the velocity of an object it's detected without reference to it's own velocity, in motion or motionless?

    1. The velocity detected by the radar is always relative in nature. To detect the absolute velocity of the object, it would be necessary to determine the velocity of the radar and then offset the measured relative velocity accordingly. The velocity of the radar can be determined using algorithms such as RANSAC for such purposes and measure of the absolute velocity is again use-case specific.
    2. The velocity of the object cannot be directly derived from the radar equation. The radar equation only gives the received power after factoring in the power transmitted, gains, efficiency, radar cross section etc. which will ultimately be a function of distance alone. Would urge you to go through the FMCW technique we use to obtain the velocity of an object. ->  mmWave radar sensors  | TI.com

    What do mean by radar mounting specifics? Regarding the radar equation still, I think the placement of the radar, usually center front grille of car, should certainly affect detection in this example. Kindly refer to the radar equation how it isn't taken into account in the MRR example.

    I would again urge you to go through the FMCW training series posted above. By mounting specifics, I meant the distance of the sensor from the ground, how its angled w.r.t azimuth and elevation planes etc.

    The angle of elevation should be steeper if the radar is placed higher on the roof of a car than in the front grille. The azimuth of the detected object should be different if objects detected are located away from the midline of the car.

    Yes. the azimuth of the detected objects will be different. In the first sentence, are you taking about the field of view of the radar perhaps? Still quite unsure as what needs to be modified.

    Regards,

    Kaushik