IWR6843ISK: Multiple people tracking up to 30 m

Aleena N A

Part Number: IWR6843ISK
Other Parts Discussed in Thread: MMWAVEPOEEVM, MMWAVEICBOOST

Hello everyone,

we need to cover an area of 30 meters and position of device should be 10 meters above the ground level with an elevation of 80 degree clockwise . We are developing the same from the IWR6843ISK and we brought two sets of IWR6843ISK, MMWAVEICBOOST and MMWAVEPOEEVM for testing

We have tested multiple people tracking. We got a range of 10m above for a single person, We have tested with changing the state parameters, allocation parameters, gating parameters and sensor position

can you just help us to figure out what parameters should change

Please help us to sort out this. it will be very much appreciated if you help us.

Thanks and regards,

Aleena N A

over 2 years ago

0 Nathan Block over 2 years ago

TI__Mastermind 37785 points

Hi Aleena,

If all you're looking to do is increase detection area, then you should increase transmit power (See section called Optimizing for FCC restrictions here), ensure that your chirp configuration is set to detect 30 meters (which can be done with the mmWave Sensing Estimator here). And ensure that the boresight of your radar points slightly further than the middle of your detection zone (boresight on the ground = height * tan(angle of elevation from the ground). If that's the case, ignore what I have below.

However, based off the picture you have below, it appears there are some fundamental constraints you'll have to consider to achieve what you want here.

Firstly, the area in which the radar can detect people is shaped like a cone, with a field of view that extends in the azimuth and elevation directions as the table below indicates (which can also be found at this link).

So, you will likely struggle to detect people in a circle below the radar if it is placed at an 80 degree angle upward from the vector that points to the ground (as your picture indicates). Are you able to detect people directly underneath the radar? I would assume not based off your drawing, but your statement "We got a range of 10m above for a single person" seems to indicate to me that you were able to detect people at 0-10 m of range.

At an angle of 80 degrees upwards from the ground, the radar boresight would points at 10 * tan(80 degrees) = 56 meters away. This is much too far for good detection. I would recommend pointing the boresight downwards to say a 65 degree angle with the ground, which would point the boresight to 21 meters away, which is still within the zone it appears you're trying to detect.

I also notice that you draw the detection zone as a circle on the ground that seems to envelope the radar. Is this intentional? If you do not point the radar nearly straight down, you will not be able to detect objects behind it.

Best,

Nate