CCS/IWR6843ISK-ODS: The long range people counting question

Agate

Expert 1275 points

Part Number: IWR6843ISK-ODS

Tool/software: Code Composer Studio

Dear TI

3D People Counting and HAVC both labs are use capon algorithm, About long range people counting is capon too ?

It's chirp setting different at long and short lab ?

over 5 years ago

0 Justin Curewitz over 5 years ago

TI__Mastermind 28055 points

Hi,

The Long Range People Detection Lab uses the OOB signal chain. This is because Capon is not suited for long range detection.

Regards,

Justin

0 Agate over 5 years ago in reply to Justin Curewitz

Expert 1275 points

Dear Justin

We observe at long range no dead zone issue (issue happen at HAVC and 3D) we are use the same ‘custom antenna’ for test . Follow test result use ‘custom antenna’ with capon need modify some thing for this issue. TI EVB antenna with capon is ok but some antenna modify the dead zone is happened. How to close this issue? Can we send our sample for TI to analysis?

0 Justin Curewitz over 5 years ago in reply to Agate

TI__Mastermind 28055 points

Hi,

Have you calibrated the antenna, using the OOB demo method? The Capon algorithm is very sensitive to antenna misalignment, which happens in production (nothing is built perfectly). Typically, OOB demo chain will be less effected by this, the symptoms you are reporting point to a need to do calibration. Procedure is described in the mmWave SDK doxygen: file:///C:/ti/mmwave_sdk_03_04_00_03/packages/ti/demo/xwr68xx/mmw/docs/doxygen/html/index.html - see the Range Bias and Phase Compensation Section.

Regards,

Justin

0 Agate over 5 years ago in reply to Justin Curewitz

Expert 1275 points

Dear Justin

Thank your information. So at product mass stage , every module need to do this compensation ?

If needed we need inform our factory to do related preparation .

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CCS/IWR6843ISK-ODS: The long range people counting question