IWR1642: About the path of tracking algorithm

Hi,

I want to ask where I can find the source code of tracking algorithm of IWR1642 or IWR6843? I find there is a document files named "tracking" in the "mmwave_industrial_toolbox_3_3_1__win\mmwave_industrial_toolbox_3_3_1\labs\lab0011-pplcount\lab0011_pplcount_pjt\radarDemo\modules" and there is also a document named "gtrack" in the path of "mmwave_industrial_toolbox_3_3_1__win\mmwave_industrial_toolbox_3_3_1\labs\lab0011-pplcount\lab0011_pplcount_pjt\radarDemo\chains\RadarReceiverPeopleCounting\mmw_PCDemo\gtrack". Could you please tell me the difference between them and which one should I reading for the tracking algorithm?

Thanks a lot.

Regards,

Jie