AWR1642: two antennas are transmitted separately

Hello Neal,

This could occur if there is a phase mismatch between the two transmitters. That would need to be corrected for.

If you keep an strong object at exactly zero deg (right in front of the radar) the phase of the signal from both the Tx should be the same. If there is a mismatch there would be a phase difference and you need to correct for this phase error in your angle estimation.

regards,

Vivek

Hi

Yes,phase mismatch,At 2T (the two antennas are transmitted separately),

Phase at the beginning OK, a few minutes later, phase mismatch, what could be the reason?

We can't find the reason for the phase mismatch, please help?

Thanks!

Hello Neal,

Which SDK version are you using ?

Regards,

Vivek

Hi，

 SDK version  2.0.0.4

Thanks！

If I understood correctly in the start of the sensor the angle estimation is good but when you start changing the temperature the angle estimation goes bad? 

For the angle estimation are you processing the data across multiple frames or are you using only one frame?

Regards,
Vivek 

Hi,

It doesn't have anything to do with temperature, it happens at any temperature,

angle estimation are  using only one frame.

Thanks!

Hi Vivek ，

Any good advice?

Thanks！

I am not clear at what point does the angle estimation does bad. You mentioned that in the beginning phase is OK and after few mins it goes bad. What is changing in those few minutes? Does it always happen that when you reset the angle estimation is good and after some time the angle estimation is going bad?

Regards,

Vivek