• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 106 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AWR2944EVM: Four transmitting antennas in azimuth on awr2944 with mmwDemo

Dmitry Trots
Prodigy 50 points
Part Number: AWR2944EVM
Other Parts Discussed in Thread: AWR2944

Tool/software:

Hi TI team，

We want to develop a board on awr2944 with four transmitting antennas in azimuth. And we want to use mmwDemo as reference project. Will mmwDemo and SDK work with such an antenna array? What modifications to the sdk (demo, dpc, dpu) should be done?

Best regards,
Dmitry

  • 0
    TI__Mastermind 20880 points

    Hi Dmitry,

    SDK demo doesn't support 4 Azimuth Tx configuration. May I know the reason behind using 4 azimuth Tx and no transmitter in elevation?

    Dmitry Trots said:
    What modifications to the sdk (demo, dpc, dpu) should be done?

    You can use SDK as reference and update the processing chain as per your requirement. It's difficult to list all the changes to support 4 Azimuth Tx configuration.

    Regards,

    Samhitha

  • 0 in reply to Samhitha Bobba
    Prodigy 50 points
    Samhitha Bobba said:
    May I know the reason behind using 4 azimuth Tx and no transmitter in elevation?

    Thanks for you reply

    As it seems to us elevation has low confidence with only two vetical antenna elements. Accuracy is acceptable for short range only.

    At the same time using this extra Tx in azimuth array enhance SNR at detection and improve separability.

  • 0 in reply to Dmitry Trots
    TI__Mastermind 20880 points

    Hi Dmitry,

    Thank you for the information.

    As mentioned in my previous reply, it's not possible to list all the changes needed to support 4 Azimuth Tx antenna pattern. Few of the changes include, updating number of azimuth and elevation antennas across the SDK.

    You should store antenna calibration parameters in Vector multiplication RAM instead of storing in CMULT_SCALE registers. Only 12 pairs of CMULT_SCALE registers are available. This change is needed to multiple antenna calibration parameters with Azimuth samples before performing Azimuth FFT. This particular change has to be made in Azimuth FFT paramset of Doppler processing - DPU_DopplerProcHWA_configHwaCFARAzimFFT.

    For more detailed information, refer to (+) AWR2944: calibration using HWA_ComplexMultiply - Sensors forum - Sensors - TI E2E support forums.

    Regards,

    Samhitha