DW1000 - Clock tracking register

I’m using DW1000 in order to build a localization system working with a one way ranging protocol. So I must cope with synchronization issue between the various anchors of the facility.
I will use clock offset tracking registers in the chip (0x13 – Receiver Time Tracking Interval and 0x14 – Receiver Time Tracking Offset) in order to estimate the skew (frequency offset between receiver and emitter clocks) in my synch algorithm. So my question is where I can find documentation about the algorithm of clock tracking implemented in the chip to provide this measure? I have to know clearly the scheme to model the measurement noise in my estimator.

Thanks for any information you can give me.