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AWR2944EVM: Output processed radar cube (range dimension, doppler dimension, antenna dimension)

Jiarui Zhang
Prodigy 70 points
Part Number: AWR2944EVM
Other Parts Discussed in Thread: AWR2944, AWR1642, AWR1843

Hi Ti team,

I have read the OOB demo and High End Corner Radar Lab user guide. These two labs do not support output processed data cube (range dimension, doppler dimension and antenna dimension), is it because of memory limitation of the radar board? Therefore, is it possible for user to modify the OOB code in CCS to output complete processed data cube only?

Thanks and looking forward to your reply!

Best regards,

Jiarui 

  • 0
    TI__Expert 8275 points

    Hi Jiarui,

                 If I understand from your question you are possibly looking for raw data dump of 1D-FFT, 2D-FFT and Angle FFT, right?

                 Yes due to memory constraints in the device AWR2944, we don't store the 1D-FFT, 2D-FFT or angle FFT as such in the device and they would be over-written by other values in OOB demo and High End Corner lab. Also, for a lot of chirps this would be not possible to store the data.

                Yes it is possible for the user to modify the code of OOB demo in CCS to output processed radar cube as per his requirements.

                Let me know if you have questions.

    Thanks and Regards,

    Akshay.

  • 0 in reply to Akshay Kumar Chandrasekaran
    Prodigy 70 points

    Hi Akshay,

    Thanks for your reply and it is really helpful. I do have another question in this case.  If I only want to output 1DFFT 2DFFT Angle FFT data cube, do you have any suggestion for configuring the chirps such that it will not exceed the limited memory? Or it is possible that you can provide me with some related document such that I can refer to adjust the configuration and modify the code?

    Another question is that compared to AWR1642 and AWR1843, which radar is better to output processed data cube? I have checked that AWR2944 has larger memory, does this mean AWR2944  can output more in one time compared to AWR1642 and  AWR1843?

    Thank you and look forward to your reply!

    Best regards,

    Jiarui

  • 0 in reply to Jiarui Zhang
    TI__Expert 8275 points

    Hi Jiarui,

                 I don't have any specific number for chirp configuration as such. It basically depends on the use-case and also the device memory size. Okay we don't have a document which specifically tells about the use data capture after 1D-FFT, 2D-FFT and angle FFT as such. But I would say the TDMA is a good place to start with for your use-case given that the chain is simple and straightforward than DDMA.

                AWR1642 and AWR1843 varies based on fact that AWR1843 has one more Tx than AWR1642 and based on your use-case you can select either of them (more Tx corresponds to more virtual antennas which results in better angle resolution). There is also MRR lab in TI resource explorer based on AWR1843. But if you want detection at higher range with SNR, you will have to move to DDMA chain based approach which TI offers as a part of AWR2944 SDK which is SDK 4.2.0.3. AWR2944 may not only have better memory size but can also have better chirp generation capabilities, HWA2.0 etc. So based on your use-case I would request you to select the corresponding chip.

               Let me know if you have any questions.

    Thanks and Regards,

    Akshay.