AWR1843BOOST: Problem of 1st FFT

HYOKBEEN LEE

Prodigy 120 points

Part Number: AWR1843BOOST
Other Parts Discussed in Thread: DCA1000EVM, AWR1843

Hello,

I am using AWR1843BOOST & DCA1000EVM.

When I get 1st FFT data, the Front of radar signal has big amplitude.

But there is no stuff front of radar. It always get Big amplitude signal in front of radar.

I post image of 1st FFT, And the signal scale is absolute not dB-scale.(But I think Scale convert doesnt matter)

Thank you.

over 3 years ago

0 Akshay Kumar Chandrasekaran over 3 years ago

TI__Expert 8275 points

Hi,

Can you please confirm that you are using the DCA100EVM+AWR1843 for raw data capture and you are taking 1D-FFT of the raw data and then plotting it in MATLAB?

The initial peak could be due to the fact that calibration of DC range signature not being done properly. Request you to please go though SDK 3.5 and search for calibDCRangeSig and use it effectively in your code to remove the initial high peaks.

Let me know if you have any queries.

Thanks and Regards,

Akshay

0 HYOKBEEN LEE over 3 years ago in reply to Akshay Kumar Chandrasekaran

Prodigy 120 points

Thank you for reply.

I got a row Data from DCA1000evm. and then get 1st FFT.

How can I get manual for calibration of DC range signature?

+1 Akshay Kumar Chandrasekaran over 3 years ago in reply to HYOKBEEN LEE

TI__Expert 8275 points

Hi,

Can you please refer to this struct: DPU_RangeProc_CalibDcRangeSigCfg in SDK 3.5 and let me know if this solves your issue?

Thanks and Regards,

Akshay

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AWR1843BOOST: Problem of 1st FFT