IWR1843BOOST: CFAR and peak grouping in the Doppler direction

Hi,

When CFAR thresholdScale in the Doppler direction is set to 0 in the OOB Demo of the IWR1843 BOOST board,
It looks like peak grouping in the Doppler direction is not working.

configuration:
---------------
sensorStop
flushCfg
dfeDataOutputMode 1
channelCfg 15 7 0
adcCfg 2 1
adcbufCfg -1 0 1 1 1
profileCfg 0 77 267 7 57.14 0 0 70 1 256 5209 0 0 30
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 16 0 100 1 0
lowPower 0 0
guiMonitor -1 1 1 0 0 0 1
cfarCfg -1 0 2 8 4 3 0 15 1
cfarCfg -1 1 0 4 2 3 1 0 1
multiObjBeamForming -1 1 0.5
clutterRemoval -1 0
calibDcRangeSig -1 0 -5 8 256
extendedMaxVelocity -1 0
lvdsStreamCfg -1 0 0 0
compRangeBiasAndRxChanPhase 0.0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
measureRangeBiasAndRxChanPhase 0 1.5 0.2
CQRxSatMonitor 0 3 5 121 0
CQSigImgMonitor 0 127 4
analogMonitor 0 0
aoaFovCfg -1 -90 90 -90 90
cfarFovCfg -1 0 0 8.92
cfarFovCfg -1 1 -1 1.00
sensorStart
---------------

Questions:

1. I look at the source code for SDK 3.4.0.3 and understand that when thresholdScale = 0, the CFAR process in the Doppler direction is skipped.
Is this understanding correct?
mmwave_sdk_03_04_00_03/packages/ti/datapath/dpc/dpu/cfarcaproc/src/cfarcaprocdsp.c
line 1580-1595

2. If I set the CFAR threshold Scale in the Doppler direction to 0, does peak grouping in the Doppler direction not work?

3. If I set the CFAR threshold Scale in the Doppler direction to 0, how do I get the peak grouping in the Doppler direction to work?

Best Regards,
Hiroyuki Taguchi