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IWR6843ISK: Inquiry About TX Start Time Behavior in mmWave Sensing Estimator 2.4.0

JAEHOON KIM
Intellectual 405 points
Part Number: IWR6843ISK

Tool/software:

Hello,

I have a question regarding mmWave Sensing Estimator 2.4.0.

My question is about "TX Start Time" in the "Outputs and Chirp Design" section as shown in the figure below.

I am using the configuration file "68xx_traffic_monitoring_70m_MIMO_3D.cfg".
I loaded this file using "LOAD CONFIG (.CFG)" and clicked the "AUTO-POPULATE" button to import the parameter settings.

In this setup:

Idle Time (us) is set to 8

txStartTime is set to 1

It seems that txStartTime should not be larger than the Idle Time.
However, in mmWave Sensing Estimator 2.4.0, even if I set txStartTime to 10 or 100, no error occurs.

Is this a system error?

Also, could you explain the difference between setting txStartTime to 1 vs 0?

  • 0
    TI__Mastermind 23037 points

    Hello,

    txStartTime is the time between the start of transmitter, to the knee of the ramp. We almost always just set this value to 1, and tends to be a low impact parameter. The mmWaveSensingEstimator focus more on the valid start time, frequency bandwidth, and others, and is not perfect with catching errors.

    Best Regards,

    Pedrhom