IWR6843: Question related to RangeAzimuthHeatmap result of IWR6843 DEMO

HI, 

The UART may not have enough capacity to transfer data for rangeAzimuth heatmap generation, can you slow down the frame rate to 2 frames/second and try again.  And also disable other heavy data transfer like Range- Doppler heatmap.  

Best,
Zigang 

Hello Zigang,

Thanks for the quick reply.

I've only enabled Range Azimuth Heat map by setting guiMonitor config as below.

guiMonitor -1 0 0 0 1 0 0

Therefore the amount of data that I am capturing every frame is less than 8kb. 

I though 8kb should not be a problem considering the UART capacity(UART baud rate for logging is 900kbs).

Also, this phenomenon was frequently observed when the object is very close to the radar(around 10cm to 20cm)

Does the distance from the radar might cause this problem?

Thank you.

Best regards,

Yechan

Hi, Yechan:

So do you have anything moving in front of the sensor?   Why you expect the heatmap to be changing?

Best,

Zigang

Hi, Zigang

Yes the object in front the radar is moving object(periodically moving).

So the heatmap should be changed.

Even if there exist only static object on the field of view, the heat map values should be changed.

But I got exactly same values from frame to frame.

Best Regards,

Yechan

HI, Yechan:

The range azimuth heatmap is generated by calculate the zero Doppler.  If you have a target that are moving at a regular speed, the zero Doppler may not change.   Can you have a person walk and stop randomly in front of the sensor and check whether the range azimuth heatmap is changing?

Why did you say that the purely static scene could still cause the change the heatmap?

Best,

Zigang