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AWR2944EVM: AWR2944 multi object detection in same range and doppler index in HECR

Modick Basnet
Prodigy 20 points
Part Number: AWR2944EVM

Tool/software:

Hi,

I want to ask a question regarding multiple objection detection in HECR for the same range and doppler index.

1. I want to if it is possible to detect multiple object in the same range and doppler index in HECR application or not? I tried to find information in "/ti/mmwave_mcuplus_sdk_04_02_00_01/mmwave_mcuplus_sdk_04_02_00_01/ti/datapath/dpc/dpu/aoaproc/docs/doxygen/html/index.html#HWA-AOA-start" but was unable to find any information. If it is enabled can you provide some description or documents where we can find this information.

2. In "\ti\mmwave_mcuplus_sdk_04_04_01_02\mmwave_mcuplus_sdk_04_04_01_02\ti\datapath\dpu\aoaproc\src\aoaprochwa.c" there is 'aoaHwaObj->dynLocalCfg.multiObjBeamFormingCfg.enabled" to set the multple object beamforming but it is parameter of TDM and not DDM. Does it work in DDM-MIMO case too.?

Thanks for your answer in advance.

Regards.

  • 0
    TI__Genius 11670 points

    Hi Modick,

    I will check your query and get back to you in 2 days.

    Regards,

    Samhitha

  • 0 in reply to Samhitha Bobba
    TI__Genius 11670 points

    Hi Modick,

    Modick Basnet said:
    I want to if it is possible to detect multiple object in the same range and doppler index in HECR application or not?

    Radar needs to resolve the objects in any one of the three dimensions i.e range, velocity and angle. If there are two objects in the same range and doppler index, it can be resolved in the angle dimension. 

    Refer to (+) AWR1443: FMCW radar angle estimation - Sensors forum - Sensors - TI E2E support forums.

    Modick Basnet said:
    In "\ti\mmwave_mcuplus_sdk_04_04_01_02\mmwave_mcuplus_sdk_04_04_01_02\ti\datapath\dpu\aoaproc\src\aoaprochwa.c" there is 'aoaHwaObj->dynLocalCfg.multiObjBeamFormingCfg.enabled" to set the multple object beamforming but it is parameter of TDM and not DDM. Does it work in DDM-MIMO case too.?

    If you are referring to this particular feature where we are trying to find another object in the azimuth FFT output, then in DDM we don't search for a second peak. Whereas in TDM we search for a second peak and add it to the object list if the peak is greater than threshold.

    Regards,

    Samhitha

  • 0 in reply to Samhitha Bobba
    Prodigy 20 points

    Hi Samhitha,

    Thank you for the reply.

    Can you also point out the portion of code in HECR that is invloved in separation of 2 targets after angle fft is performed.

  • 0 in reply to Modick Basnet
    TI__Genius 11670 points

    Hi Modick,

    After Azimuth FFT, doppler CFAR is performed on the azimuth FFT samples. And local max is performed on the Azimuth FFT samples in both range and doppler dimension. A list of detected objects is created by merging the detections of doppler CFAR and local max.

    For a given range-doppler bin, if two peaks detected in the Azimuth FFT, two objects with different azimuth bin index is added to the list. 

    You can check Doppler CFAR and local max in DopplerprocDDMA.

    Regards,

    Samhitha