echo on
rho_b1=0:1:35;                                  %用于計(jì)算仿真誤碼率 
for i=1:length(rho_b1),
    smld_err_prb1(i)=err1(rho_b1(i));
    echo off;
end;

echo on
rho_b=0:2:36;
for i=1:length(rho_b),
    smld_err_prb2(i)=err2(rho_b(i));
    echo off;
end;
echo on;


semilogy(rho_b1,smld_err_prb1,'*',rho_b,smld_err_prb2,'r');