Free space loss

[shengun567]

PL(i) = 22.7log10(distance(i)) + 27 + 20log10(fc/1e9);
the unit of distance is km, so
PL(i) = 22.7log10(distance(i)/1000) + 27 + 20log10(fc/1e9);

[msepulcre]

The distances are defined in meters in Winner models.