Formula Sheet Free Space Pathloss, Reflection and Diffraction
Pathloss Models
PCS Extension to Hata Model An extended version of the Hata model developed by COST‐231 working committee for 2 GHz range
fc is the frequency (1500MHz to 2000 MHz) hte is the effective transmitter height in meters (30m to 200m) hre is the effective transmitter height in meters (1m to 10 m) d is the T‐R separation in Km (1 Km to 20 Km)CM=0 dB for medium sized city and suburban areas, CM=3 dB for metropolitan centers
Probability of Bad Reception Quality
Calculation of Percentage of Coverage Area 1 1 2ab 1 ab U γ 1 erf a exp 1 erf 2 2 b b a
γ PT PL d 0 10nlog R d 0 2σ
b
10nloge 2σ