AWR1642: Question on CFAR

Part Number:AWR1642

Hi:

In TI's  mmW Demo,I found that CFAR is  implemented in logarithmic scale，

Function：

mmwavelib_cfarCadBwrap（）；mmwavelib_cfarCadB_SOGO（）；

What is the benefit of Ti choosing to complete CFAR in logarithmic scale rather than real abs value ?

Thanks