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AWR1843BOOST: The Traffic Monitoring lab supports BPM mode?

Antonio Jurado
Prodigy 175 points
Part Number: AWR1843BOOST
Other Parts Discussed in Thread: IWR1843, IWR6843, AWR1843

Hi,

I'm working with the AWR1843BOOST and I would like to use the BPM mode in the traffic monitoring lab. I would like to transmit with the three antennas simultaneously with zero phase between them. I saw that the code says that the BPM is not supported yet, but I read this thread: e2e.ti.com/.../awr1843boost-to-enable-bpm-mode


I compared the OOB BPM code with the Traffic Monitoring lab as the thread says:

1. Add MmwDemo_CLIBpmCfg in mmw_cli.c
2. Add bpmcfg entry in MmwDemo_CLIInit
3. Add MmwDemo_bpmConfig in mss_main.c
4. Add MMWDEMO_BPMCFG_OFFSET to mmw_mss.h
5. Add bpmCfg and isBpmCfgPending fields to MmwDemo_SubFrameCfg in mmw_mss.h
6. Modify MmwDemo_setSubFramePendingState, MmwDemo_resetStaticCfgPendingState, MmwDemo_isAllCfgInPendingState and MmwDemo_isAllCfgInNonPendingState to incorporate isBpmCfgPending in mss_main.c

The Traffic Monitoring lab has all this characteristics, so I have some cuestions.

1. Why the code says that the BPM it isn't supported?
2. It is possible to implement it? It is necessary more changes?
3. If it is possible to implement BPM mode, Could I transmit with the three antennas simultaneously without difference of phase between them?

Thanks

  • 0
    TI__Guru*** 149204 points

    Hi,

    Unfortunately, we don't have any demo that shows how to use BPM with 3Tx.

    As far as I know, Traffic Monitoring is a demo that was implemented using 2TX on the xWR16xx platform. It does not include any elevation information

    If you want to enhance the range performance of that demo, you should probably look a the MRR demo that supports BeamForming mode that enables all 3 Tx at the same time.

    For more details regarding the Traffic Monitoring demo, I have assigned this thread to the team that supports it

    Thank you

    Cesar

  • 0 in reply to Cesar
    Prodigy 175 points

    Hi,

    Cesar said:
    As far as I know, Traffic Monitoring is a demo that was implemented using 2TX on the xWR16xx platform

    Thank you. Then It is possible to transmit in Traffic Monitoring Lab with 2Tx antennas simultaneously?. If it is not supported, it can be implemented? What changes are required?

    Thanks.

  • 0 in reply to Antonio Jurado
    TI__Mastermind 23725 points

    Hello

    Device wise IWR6843 and IWR1843 both support BPM operation, so at device level it is possible.

    The specific example that you are referring to in this case about the traffic monitoring example may have to be adjusted to account for the BPM based receive data and how to process it.

    Have you had a chance to set the BPM configuration on this demo and see the results yourself.

    Thank you,

    Vaibhav

  • 0 in reply to Vaibhav Mahimkar
    Prodigy 175 points

    Hello,

    Vaibhav Mahimkar said:
    Have you had a chance to set the BPM configuration on this demo and see the results yourself.

    I tried, but the code says that the BPM it doesn't support on this demo so, there is another manner to transmit with 2 Tx simultaneously without BPM?

    In parallel I will try to adjust the processing chain to use the BPM. Do you have any advise to adjust the processing chain?

    Thank you.

  • 0 in reply to Antonio Jurado
    TI__Mastermind 23725 points

    Hello

    Traffic monitoring demo allows you to enable multiple transmitters simultaneously - would recommend you to try that on 18xx version by following the configuration provided on 68xx as example.

    Would you please help us understand what would be the objective of using BPM in your case.

    Thank you,

    Vaibhav

  • 0 in reply to Vaibhav Mahimkar
    Prodigy 175 points

    Hello,

    Vaibhav Mahimkar said:
    Would you please help us understand what would be the objective of using BPM in your case.

    I'm working with the AWR1843 in a custom board and I would like to detect a person around 12-20 meters but I doesnt detect above 6 meters. So based on that, I'm trying to enable more antennas in transmission in BPM mode with zero phase between them to improve transmission power and detect further.


    I tried to use this configuration with 2 Tx antennas transmitting simultaneously:

    profileCfg 0 77 8 7 28 0 0 20 1 256 12500 0 0 48
chirpCfg 0 0 0 0 0 0 0 5 //Tx1 and Tx3
chirpCfg 1 1 0 0 0 0 0 5 //Tx1 and Tx3
bpmCfg -1 0 0 1 //BPM disabled, zero phase between antennas

    But It didn´t works. Is this configuration wrong or do you  know how to set the correct configuration?

    Thank you.

  • +1 in reply to Antonio Jurado
    TI__Mastermind 23725 points

    Hello

    Have you tried to change the  FMCW configuration so that it reaches the desired distance.

    Please use the mmWave sensing estimator tool to get the appropriate configuration that allows detection upto that range.

    Limitation may not be based on how far the antenna is able to send the signal but if the current FMCW configuration allows the desired range.

    Please check the mmWave training on training.ti.com for basics of FMCW.

    Thank you,

    Vaibhav