AWR1843BOOST: mmWave Demo Visualizer object detection

Burak

Part Number: AWR1843BOOST
Other Parts Discussed in Thread: AWR1843

Hello,

I am currently working on my bachelor thesis with an AWR1843. I have some questions for the community that I could not answer myself. I hope someone can help me.

In the Range Profile with Zero Doppler, there is a detected point directly in front of the sensor at 0.08 meters but there is no object in this distance to the Sensor.
How is the "detected object" assigned? Is it dependent on the peak?
When I conifgure the antenna confiugarion in mmWave DemoVisualizer as 4RX/2TX I can see the scatter plot in 2D. I cannot see the change in the scatter plot in the Range Profile. Is there an explanation for this?
What is the accuracy of the sensor? For example, Bosch states a measuring accuracy of 0.12m for its MRR front radar sensor. I could not find anything in the data sheet for the AWR1843.
I measured the object with the current configuration. At a distance smaller than 2m, the measurement is accurate to +/- 0.08m. If the distance between the sensor and the object is greater than 2 meters, the accuracy becomes less accurate (+/- 0.2m). Is this the normal measuring inaccuracy or is the configuration wrong?

Thanks in advance for your efforts and answers!

Best regards,

Burak

over 4 years ago

0 Ishita Kochar over 4 years ago

TI__Mastermind 31680 points

Hello Burak,

Our concerned expert will review your concern and get back by next week if that's okay.

Thankyou for your patience.

Regards,

Ishita

0 Burak over 4 years ago in reply to Ishita Kochar

Prodigy 20 points

Looking forward to your reply!

Regards,

Burak

0 Ishita Kochar over 4 years ago in reply to Burak

TI__Mastermind 31680 points

Hello Burak,

extremely sorry for the delay. Let me reach out to our team and escalate your query as soon as possible.

Regards,

Ishita

0 Jitendra Gupta over 4 years ago

TI__Guru 69660 points

1. That very near reflection is due to antenna coupling which can be neglected or vanish by antenna calibration. mmw demo from Mmwave SDK does that.

2. That can be multiple way to identify an object, it can be based on threashold of a peak, or combination of multple peaks (clustering). Different usecase or algo may have differnet way to get these object list from the processing chain output. you can refer mmw demo processing chain or any other TI-Rex labs.

3. Range profile is array of profile points at 0th Doppler (stationary objects). so it may not change over the series of time till scene gets change or sensor moves.

4. refer this https://e2e.ti.com/support/sensors/f/1023/t/950172,

5. Range accuracy depends on the range of object from the sensor, farther the object accuracy may reduce. (refer above e2e for more detail).

https://training.ti.com/mmwave-training-series

Regards,

Jitendra

Sensors

Sensors forum

AWR1843BOOST: mmWave Demo Visualizer object detection