cp0602_symbol_error_probability.m

超宽带链路分析主程序书标有example的M文件 能很直观的看到超宽带不同距离的带宽（速率）

function cp0602_symbol_error_probability
Eb_N0=logspace(0.5,2);
M=[2 4 8];
for i=1:3
    M_PAM(i,:)=(1-1/M(i))*erfc(sqrt(Eb_N0*3*log2(M(i))/(M(i)^2-1)));
    M_PPM(i,:)=exp(-0.5*log2(M(i))*(Eb_N0-2*log(2)));
end
%图形输出
M_ary_BEP=[M_PAM' M_PPM']';
F=figure(1);
set(F,'position',[100 190 650 450]);
set(gcf,'DefaultAxesColorOrder',[0 0 1],'DefaultAxesLineStyleOrder','-+|-o|-*|:s|:d|:^');
PT=semilogy(10*log10(Eb_N0),M_ary_BEP);
set(PT,'lineWidth',[2]);
hold on
L=legend('2-PAM','4-PAM','8-PAM','2-PPM','4-PPM','8-PPM');
set(L,'FontSize',12);
X=xlabel('E_b/N_0');
set(X, 'FontSize',14);
Y=ylabel('Pr_e ');
set(Y, 'FontSize',14);
AX=gca;
set(AX,'Fontsize',14);
axis([5 20 1e-6 1e-1]);
set(AX, 'XTick',[5 7.5 10 12.5 15 17.5 20]);
grid on