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IWR6843ISK-ODS: Phase Inversion in Software -- Where to apply / where is it applied?

Alex Byrley
Intellectual 465 points
Part Number: IWR6843ISK-ODS

So according to:

https://dev.ti.com/tirex/explore/node?node=A__AD--3fXT2snS5PQ1kzp-cw__com.ti.mmwave_industrial_toolbox__VLyFKFf__4.9.0

We need to apply a 180 degree phase inversion for some of the virtual antennas.

Questions:
1. Is this done for us in the MMWave Demo OOB? If so, where is it done? If not, where do you recommend we do it?
2. Do you have any examples from other applications where this is done?

Thanks,

Alex

  • +1
    TI__Mastermind 37805 points

    Hi Alex,

    Alex Byrley said:
    1. Is this done for us in the MMWave Demo OOB? If so, where is it done? If not, where do you recommend we do it?

    In the mmWave Demo OOB for the ODS antenna, I believe the phase inversion needs to be applied through the compRangeBiasAndRxChanPhase CLI command. If you look at the area scanner demo, which is based off the OOB, you'll see that the compRangeBiasAndRxChanPhase argument for the ISK, AOP and ODS packages mimics the expected phase inversions

    ISK

    compRangeBiasAndRxChanPhase 0.0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0

    ODS

    compRangeBiasAndRxChanPhase 0.0 1 0 -1 0 -1 0 1 0 1 0 -1 0 -1 0 1 0 1 0 -1 0 -1 0 1 0

    AOP

    compRangeBiasAndRxChanPhase 0.0 1 0 -1 0 1 0 -1 0 1 0 -1 0 1 0 -1 0 1 0 -1 0 1 0 -1 0

    Best,

    Nate

  • 0 in reply to Nathan Block
    Intellectual 465 points

    That was exactly what I was looking for. Thanks!