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Extracurricular/FCG/Radio reception.md

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+- 110m, distance from centers EA->BB
+
+### FSPL
+$$
+\begin{gather}
+FSPL(dB) = 20\log_{10}(d) + 20\log_{10}(f)+20\log_{10}\left( \frac{4\pi}{c} \right) \\
+FSPL = 20\log_{10}(0.1) + 20\log_{10}(446) + 36.44\\
+\approx 66 dB
+\end{gather}
+$$
+
+Loss just by transmitting (assuming 0 gain for both transmit and receive). Pretty bad.
+
+## Wall attenuation
+- Assuming 1 meter thickness per wall, estimate `15dB` loss, assuming max 4 walls
+$$
+66dB+ 60dB = 126dB
+$$
+
+## Total Loss
+$$27 - 126 = -99dBm$$
+
+## Conclusion
+Assuming $-100dBm$ is the sensitivity bound, that shit is BARELY above it. Any interference would cause us to not hear each other.