gusucode.com > 自由空间路径损耗 > path loss/plot_PL_general.m
%plot_PL_general.m,绘制不同的路径损耗模型 clear all,clf,clc addpath('E:\matlab') fc=1.5e9; d0=100; sigma=3; distance=[1:2:31].^2; Gt=[1 1 0.5]; Gr=[1 0.5 0.5]; Exp=[2 3 6]; for k=1:3 y_Free(k,:)=PL_free(fc,distance,Gt(k),Gr(k)); y_logdist(k,:)=PL_logdist_or_norm(fc,distance,d0,Exp(k)); y_lognorm(k,:)=PL_logdist_or_norm(fc,distance,d0,Exp(1),sigma); end subplot(131) semilogx(distance,y_Free(1,:),'k-o',distance,y_Free(2,:),'k-^',distance,y_Free(3,:),'k-s') grid on,axis([1 1000 40 110]) title(['Free PL-loss Model,f_c=',num2str(fc/1e6),'MHz']) xlabel('Distance[m]'),ylabel('Path loss[dB]') legend('Gt=1,Gr=1','GT=1,Gr=0.5','Gt=0.5,Gr=0.5',2) subplot(132) semilogx(distance,y_logdist(1,:),'k-o',distance,y_logdist(2,:),'k-^',distance,y_logdist(3,:),'k-s') grid on,axis([1 1000 40 110]) title(['Log-distance Path-loss Model,f_c=',num2str(fc/1e6),'MHz']) xlabel('Distance[m]'),ylabel('Path Loss[dB]') legend('n=2','n=3','n=6',2) subplot(133) semilogx(distance,y_lognorm(1,:),'k-o',distance,y_lognorm(2,:),'k-^',distance,y_lognorm(3,:),'k-s') grid on,axis([1 1000 40 110]) title(['Log-normal Path-loss Model,f_c=',num2str(fc/1e6),'\sigma=',num2str(sigma),'dB']) xlabel('Distance[m]'),ylabel('Path loss[dB]') legend('path 1','path 2','path 3',2)