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how is RSSI measured?

PostPosted: Fri Feb 18, 2022 2:41 pm
by electricon
im working on an project that includes measureing the RSSI. So i wondered how exactly the value is hardwarebased measured. It would be great if someone could explain it to me.
Thanks in advance!

Re: how is RSSI measured?

PostPosted: Tue May 24, 2022 9:07 am
by eriksl
RSSI is the actual strength of the signal. I guess it's just measured with an ADC from the hardware, no much to eplain there.

Something like SNR (signal to noise ratio) is actually more interesting than the RSSI value. A signal with a low RSSI value but acceptable SNR can be used without a problem. On the other hand, if the RSSI is good and the SNR is low, the signal may be unusable.

The interesting thing is that SNR actually can be calculated without hardware help, by counting the amount of corrections the FEC (error correction) needs.