自由空间损耗公式

自由空间损耗

垂直隔离度

Ls=32.45+20Log 10(F MHz )+20log 10(D Km )LV=28+40log(d/波长)

Ls=92.45+20Log 10(FG Hz )+20log 10(D Km )

L(dB)=69.55+77-13.82log10h1-a(h2)+(44.9-6.55log10h1)log10dkm-K K=4.78log 2(10fMHz)－18.33log 10fMHz+40.94

a(h2)=(1.1log10fMHz-0.7)×2－(1.56log10fMHz－0.8)=1.23

CDMA GSM

3G DCS