I will be very thankful if you could clarify something to me.
Assume I am standing at point A and scanning WiFi around me. My phone records an access point X with a signal strength, let's say -50 dBm. I use FSPL (Free Space Path Loss) formula and calculate that the AP (Access Point) X is somewhere in radius of 5 meters around me. Then I make another scan, but this time record an AP X with a signal strength -75 dBm. The same FSPL formula suggests that X is somewhere in radius 55 meters from me.
My question is - can I safely assume that X is no farther than 5 meters from me ? Because if not and it is let's say 10-20 meters away, how can I explain a signal strength of -50 dBm, which corresponds to 5 meters distance. Is it possible that signal strength from a farther location will be stronger than from the nearer location ?
Thank you in advance for all the answers.