IWR1642BOOST: Increase Max Velocity in Traffic Monitoring

Hi everyone,

I want to detect cars with high speed (up to 180 Km/h) in a short range. 

I changed the config file of "traffic monitoring", and run on IWR1642, but it didn't work.

I read these related posts, but I don't get my answer, so post a new thread.

I understand that to increase the "Max Velocity", sum of the "Idle time" and "Ramp End time" must be decreased. But when I decrease this sum lower than 25 us, the device don't work. I tried and changed every parameters and didn't work.

This config file work fine:

 channelCfg 15 1 0

adcCfg 2 1

adcbufCfg 0 1 1 1

profileCfg 0 77 5 8 20 0 0 21.5 1 64 6250 0 0 48

chirpCfg 0 0 0 0 0 0 0 1

frameCfg 0 0 64 0 100 1 0

but when I change "idle Time" form 5 to 4, don't work:

profileCfg 0 77 4 8 20 0 0 21.5 1 64 6250 0 0 48

or when I change "Ramp End time" form 20 to 19, don't work:

profileCfg 0 77 5 8 19 0 0 21.5 1 64 6250 0 0 48

Also, I used the mmWave Sensing Estimator to set the parameters in config file. My config has not any error in this tool but did not work.

 I have some questions, please help me.

1. Is it possible to detect a car with 180 Km/h with IWR1642 and "Traffic Monitoring" project just by changing the config file? How?

2. I think the "Traffic Monitoring" has limitations in config parameters, how to understand these limitation without trial and error. For example the minimum value of "Ramp End time". ( I read the documents and consider the formulas, also using the "mmWave sensing Estimator", but there are some limitation that i don't know.)

3. Why the output parameters from the "mmWave Sensing Estimator" have problem in device, but there is not an error in the tool?

 4.I did some practice tests and found that when the car's speed is more than "max velocity", it shows less speed. How can I understand if the speed of the car is more than "max velocity"?

 Thanks in advance for your consideration.