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IWR1843BOOST: How was the traffic monitoring chirp configuration generated?

Part Number: IWR1843BOOST
Other Parts Discussed in Thread: IWR1843, AWR1843

Hi,

The 18xx_traffic_monitoring_70m_MIMO_3D.cfg file contains the header:

% ***************************************************************
% Created for Traffic Monitoring 18xx v2.0.x
% Frequency:77
% Platform:xWR18xx
% Azimuth Resolution(deg):15
% Range Resolution(m):0.366
% Maximum unambiguous Range(m):75.0
% Maximum Radial Velocity(m/s):13.52
% Radial velocity resolution(m/s):0.422
% Frame Duration(msec):50
% ***************************************************************

How was the chirp configuration in this file generated? I had a look at the https://dev.ti.com/gallery/view/mmwave/mmWaveSensingEstimator/ver/1.4.0/ ,but IRW1843 is not there. Is there another tool or methodology?

Thanks!

  • HI, there:

    It is the same between IWR1843 vs. AWR1843 in terms of chirp design.  Please use AWR1843 inside sensing estimator.  

    Best,

    Zigang

  • Hi Zigang,

    Thanks for that. I tried that before, but I do not get the same results. For example:

    profileCfg 0 77 8 7 28    0 0 20    1 256 12500 0 0 48 % from the *70m_MIMO_3D.cfg file
    profileCfg 0 77 2 4 33.91 0 0 14.19 1 228  7886 0 0 30 % from the sensing estimator tool

    frameCfg 0 2 40 0  50 1 0 % from the *70m_MIMO_3D.cfg file
    frameCfg 0 0 40 0 100 1 0 % from the sensing estimator tool

    The values I entered in the tool are in the image below. When I try to use these new values, the board freezes immediately after the sensorStart command. Help please.

    Regards,

    Carlos

  • HI, 

    The golden reference to check the ramp time related parameter (idle time, ADC start time, ramp time) is to go through the "rampTimingCaculator" tab inside the radar studio.   I checked for you in your case, it looks fine to me, see the picture below.

    Can you keep the profile configuration, but keep the all other chirp configuration and frame configuration like below?

    profileCfg 0 77 2 4 33.91 0 0 14.19 1 228  7886 0 0 30 % from the sensing estimator tool

    chirpCfg 0 0 0 0 0 0 0 1
    chirpCfg 1 1 0 0 0 0 0 4
    chirpCfg 2 2 0 0 0 0 0 2
    frameCfg 0 2 40 0 50 1 0

    Best,

    Zigang