AWR1642BOOST-ODS: Ghost detections in Obstacle Detection lab from automotive toolbox

Pranav Joshi

Part Number: AWR1642BOOST-ODS

Hello ,

Automotive toolbox version 2.7.1 (latest)

OS : Windows

I was running 'Obstacle Detection' Lab on my AWR1642ODS EVM. I saw frequent ghost detections when an obstacle was at an azimuth angle less than 30 degrees , or greater than -30 degrees( 0 degree is along y axis).

Here is an example .

Here is a picture of the top down view. There are no other objects within 3m radius of the awr sensor.

The object is located at the position of green box at about 30 degrees. I observed frequent ghost detections at same range and approx angle -30.(0 degree is along y axis).

The ghost detections are usually mirrored, ie they occur at same angle mirrored on y axis.

What might be the reason for this observation ?

Thanks ,

Pranav.

over 5 years ago

0 Cesar over 5 years ago

TI__Guru*** 149014 points

Here are some thoughts

1) Do you still see the ghost detections in a different environment?

It is possible that they are caused by multi path reflections. If the ghost is symmetrical than this is probably not the cause

2) Do the ghost reflections appear at smaller angles.

If they do not than this is caused by a phase shift in the DoA at the edge of the FOV

thank you

Cesar

0 Pranav Joshi over 5 years ago in reply to Cesar

Intellectual 390 points

I see ghost detections in different environments, and I observe them only at smaller angles.

Thanks.

0 Cesar over 5 years ago in reply to Pranav Joshi

TI__Guru*** 149014 points

We are not able to reproduce this behavior on the board we have.

What type of power supply are you using?

thank you

Cesar

0 Pranav Joshi over 5 years ago in reply to Cesar

Intellectual 390 points

It's a powerstation with an ac output of 110V/60Hz and a wattage of 85W.Thanks.

0 Cesar over 5 years ago in reply to Pranav Joshi

TI__Guru*** 149014 points

Hi,

Sorry for late reply.

Unfortunately we are not able to reproduce this behavior.

Is there any update since our last exchange?

Thank you

Cesar

0 Cesar over 5 years ago in reply to Cesar

TI__Guru*** 149014 points

I have performed many testes these last days with the Obstacle detection demo and have not seen any ghosts.

I will close this thread since I was not able to reproduce the issue

thank you

Cesar

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AWR1642BOOST-ODS: Ghost detections in Obstacle Detection lab from automotive toolbox