AWRL6432BOOST: What is difference with AWRL6432 and AWR6843AOP ?

Hi, There

i want to know very basic radar knowledge.

here is our test environment.

1. position a test object which is occur same Doppler during operation.

2. there are two radar sensor (AWRL6432 / AWR6843AOP ) . and then measure  max doppler value on each radar.

[Result]

- AWRL6432 radar detects Doppler value consistently.

- but, AWR6843AOP radar don't measure Doppler value consistently.

So, i really know which reason make a difference like this.

AWRL6432 : BPM (Binary phase modulation) , ADC sample  more big than 64 , 2tx,3rx

AWR6843AOP : TDM(Time division multiplexing) , ADC sample 64 , 3tx 4rx

The first thought that comes to mind ,

AWRL6432 has more big adc sample, Thus can detect very high resolution value 

however AWR6843AOP can miss max doppler value. 

is it right opinion? 

please your radar knowledge.