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IWR1642BOOST: How to interpret the received signal power in dB for IWR1642?

Part Number: IWR1642BOOST
Other Parts Discussed in Thread: IWR1642

Hello,

I am using DCA1000 and IWR1642 to collect raw data for post processing. I understand the captured signals are in the format of complex numbers and the magnitude are related to the signal power. 

I am using matlab for data processing with abs() and log() functions. The reflected power resulted in the magnitude of 8000 - 10000 (human being as objects.) 

My question is that how to interpret this reflected power in dB or which formula should I use?

Something like this:

Thank you so much!

Best,

Hang