Table 2 K value correction coefficient term of SPM model
K value | Coefficient meaning | Whether to correct |
|---|---|---|
K1 | Constant loss, frequency dependent | Y |
K2 | Transmission distance loss | Y |
K3 | Loss factor caused by changes in base station antenna height | N |
K4 | Diffraction loss, only hilly terrain will be considered | N |
K5 | Influence of base station antenna height and propagation distance on received power | N |
K6 | Gain caused by changes in antenna height at the receiving end, when the terminal height is 1.5 m, usually set to 0 | N |
Kclutter | Various ground loss, the default value is 1 | N |