Free-space path loss
FSPL = 20 log₁₀(dkm) + 20 log₁₀(fMHz) + 32.44Select endpoints, an optional relay, and an operating band. Link generates a transparent planning model you can refine below.
FSPL = 20 log₁₀(dkm) + 20 log₁₀(fMHz) + 32.44N = −174 + 10 log₁₀(BHz) + NFEb/N₀ = Pr − N + 10 log₁₀(B/Rb)M = available Eb/N₀ − required Eb/N₀ + coding gain − implementation marginModel assumes a free-space far-field link and room-temperature thermal noise density of −174 dBm/Hz. It does not yet model obstruction, fading, Doppler, regulatory constraints, or antenna geometry.