www.gusucode.com > CDMA小区网络源码程序 > CDMA小区网络源码程序/pathloth.m
x_bs=0; %location of BS y_bs=0; x_ms=200; %location of MS y_ms=300; r_hexagon=364; hb=30; %base station antenna effective height,Unit:m hm=1.5; %mobile station antenna effective height,Unit:m c=3; %0db for medium cities & suburban areas; 3db for metropolis f=2145; %WCDMA downlink channel,Unit:MHz B=5*10^6; %WCDMA carrier bandwidth pt=3; %dB,33dbm,10lg(w*1000)=10lgw+30=dBm,WCDMA maximum output power 33,27,24,21dBm n0=10^(-19); %AWGN power spectrum density x_hexagon=[x_bs-r_hexagon,x_bs-1/2*r_hexagon,x_bs+1/2*r_hexagon,x_bs+r_hexagon,x_bs+1/2*r_hexagon,x_bs-1/2*r_hexagon,x_bs-r_hexagon]; y_hexagon=[y_bs,y_bs-r_hexagon,y_bs-r_hexagon,y_bs,y_bs+r_hexagon,y_bs+r_hexagon,y_bs]; plot(x_hexagon,y_hexagon) axis([-1000 1000 -1000 1000]) text(x_bs,y_bs,'+') text(x_ms,y_ms,'*') d_bs_ms=sqrt((x_ms-x_bs)^2+(y_ms-y_bs)^2)*0.001; %Unit:km ahm=(1.1*log10(f)-0.7)*hm-(1.56*log10(f)-0.8); %mobile station antenna height correction factor pathloss=46.3+33.9*log10(f)-13.82*log10(hb)-ahm+(44.9-6.55*log10(hb))*log10(d_bs_ms)+c; %cost231-hata,Unit:dB pr=pt-pathloss; %dB prw=10^(pr/10); SNR=prw/(n0*B); fprintf('%f\t\n',SNR);