Dear all, In wireless-phy.cc, it says
// Assume AT&T's Wavelan PCMCIA card -- Chalermek // Pt_ = 8.5872e-4; // For 40m transmission range. // Pt_ = 7.214e-3; // For 100m transmission range. // Pt_ = 0.2818; // For 250m transmission range. // Pt_ = pow(10, 2.45) * 1e-3; // 24.5 dbm, ~ 281.8mw What is the formula behind these parameters? It seems Pt_ is not inversely proportional to square of transmission range (Pt_1/Pt_2 != d2^2/d1^2). How does it work? If I want a 500m transmission range, what is the transmission power supposed to be? Thanks much for your help.