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jeongeun
Level 1
Level 1
First reply posted First like given First question asked

Hello everyone, 

I want to know the meaning of magnitude [dB] in the frequency domain in the Radar GUI.

The meaning of "dB" is relative. I want to know what 0 dB means.

jeongeun_1-1656051936077.png

Thank you very much!

Best regards

 

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1 Solution
George_T
Moderator
Moderator
Moderator
50 likes received First question asked 250 replies posted

Hi @jeongeun,

The magnitude in the Frequency Domain plot is the magnitude of the FFT of the raw Time Domain data of the radar (ADC normalized) as per the FFT Configuration in the Frequency Domain Settings.

Best regards

George

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4 Replies
George_T
Moderator
Moderator
Moderator
50 likes received First question asked 250 replies posted

Hi @jeongeun,

Could you please let us know which board are you referring to?

Thanks and regards

George

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George_T
Moderator
Moderator
Moderator
50 likes received First question asked 250 replies posted

Hi @jeongeun,

If you are referring to Distance2Go board, the FFT magnitude value is converted to dB with reference to the lowest value for the range threshold. The lowest value for the range threshold is 1 and 0 dB corresponds to magnitude value of 1.

Thanks and regards

George 

jeongeun
Level 1
Level 1
First reply posted First like given First question asked

Thank you for your reply.
That's right. I'm referring to the Distance2go board.

When it is 0dB, the magnitude value is 1, what is the unit?

Thank you very much!

Best regards

0 Likes
George_T
Moderator
Moderator
Moderator
50 likes received First question asked 250 replies posted

Hi @jeongeun,

The magnitude in the Frequency Domain plot is the magnitude of the FFT of the raw Time Domain data of the radar (ADC normalized) as per the FFT Configuration in the Frequency Domain Settings.

Best regards

George