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IWR1843BOOST: Questions about configuring the BPM transmission mode of the IWR1843.

粟桐 张
Prodigy 90 points
Part Number: IWR1843BOOST
Other Parts Discussed in Thread: IWR1843
I need to configure the BPM transmission mode for the IWR1843. As I understand it, for the IWR1843 with TX0 and TX2 enabled, under the same number of ADCs and Chirps, the bin file size obtained by setting it to TDM transmission mode should be twice the size of the bin file obtained by setting it to BPM transmission mode.

I have configured the BPM transmission mode of the IWR1843 according to the steps in https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/925558/awr1443boost-bpm-configuration, and I found that the output bin file size is still 50MB. I do not understand this. About more details, based on my understanding, for the IWR1843 with TX0 and TX2 enabled, under the same number of ADCs and Chirps, the bin file size obtained with TDM transmission mode should be twice the size of the bin file obtained with BPM transmission mode.

I have set the number of ADCs to 256, the number of Chirps per frame to 128, and 50 frames. According to this configuration, the file size obtained with TDM should be 50*8*256*128*16*2/8/1024/1024=50MB. The file size obtained with BPM should be 50*4*256*128*16*2/8/1024/1024=25MB. However, I do not understand why the file size obtained with BPM is also 50MB.

 

  • 0
    Prodigy 90 points

    Below is the process I used to configure BPM:

    1. Enable the phase shifters

    2. Configure Chirp 0

    3. Configure Chirp 1

    4. Configure BPM Chirp 0

    5. Configure BPM Chirp 1

    6. Configure Frame

    The following image shows the results of the configured Manage Chirps and Manage BPM Chirps.

    I am unsure where I went wrong, leading to the bin file size being 50MB instead of the expected 25MB when configured in BPM mode.

    Looking forward to response. Thank you!

  • +1 in reply to 粟桐 张
    Prodigy 90 points

    Now I find the problem, I misunderstood the meaning of "No of Chirps Loops". I thought it was the number of total chirps, actually it is the number of the combination of chirp0 + chirp1.