IWR1843BOOST: why the power of a chirp between a frame is different?

xuanying G

Part Number: IWR1843BOOST
Other Parts Discussed in Thread: DCA1000EVM,

Hi, I use IWR1843BOOST and DCA1000EVM detecting a wall far from the radar about 4 meters.

I add the absolute value of all the adc samples of a chirp, and then I get the following result

this is 5000+ points, every point represent the sum of all the adc samples' absolute value of a chirp. the following picture is 3 frames, and these is 64 chirps in a frame.

I want to know why the power of per chirp in a frame is different, and it seems has a kind of Periodicity.

over 4 years ago

0 Vaibhav Mahimkar over 4 years ago

TI__Mastermind 23725 points

Hello

We would recommend checking on following:

1. Enable calibration of RF front end: Self-Calibration of mmWave Radar Devices (Rev. A)

2. Repeat measurements with sharp object/corner reflector, log corner reflector 1st FFT peak values.

3. Check if variations are within the datasheet limits.

Thank you,

Vaibhav

0 xuanying G over 4 years ago in reply to Vaibhav Mahimkar

Prodigy 80 points

thank you, I will try your advice.

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IWR1843BOOST: why the power of a chirp between a frame is different?