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