IWR6843: phase shift for TDM-MIMO

Kai Yang1

Part Number: IWR6843

When multiple TXs are activated for TDM-MIMO in cfg file, the received signals due to different TXs are not simultaneous. It means the moving target would introduce an additional phase shift for different TXs. I was wondering if you correct this phase shift in the signal processing part. If so, where is implemented or do you have reference to that?

Thanks!

Kai

over 4 years ago

0 Akash Gondalia over 4 years ago

TI__Guru 50240 points

Hi Kai,

I've asked an expert to look into this and we should have an answer for you sometime next week.

Regards,

0 Former Member over 4 years ago in reply to Akash Gondalia

Hello,

You are referring to doppler compensation and can find this implemented in the OOB demo code. There is also a good explanation in this thread https://e2e.ti.com/support/sensors/f/1023/p/678534/2501304#2501304

Amanda

0 Kai Yang1 over 4 years ago in reply to Former Member

Expert 1400 points

Hi Amanda

Thanks for your useful link and it is very helpful.

Would you please let me know which part in OOB demo implements doppler compensation?

Thanks!

Kai

0 Former Member over 4 years ago in reply to Kai Yang1

Hello,

A quick search of the provided source code or the documentation would show that the doppler compensation function is AoAProcHWA_dopplerCompensation and is implemented in the AoA DPU. Please check the doxygen for more details.

Amanda

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IWR6843: phase shift for TDM-MIMO