2fsk的相关器输出.m

2FSK 的调制与解调 实现误码率图 MATLAB

echo on
   Tb=1;
   f1=1000/Tb;
   f2=f1+1/Tb;
   phi=pi/4;
   N=5000;
   t=0:Tb/(N-1):Tb;
   u1=cos(2*pi*f1*t);
   u2=cos(2*pi*f2*t);
   
sgma=1;
   for i=1:N,
     r(i)=cos(2*pi*f1*t(i)+phi)+gngauss(sgma);
     echo off;
   end;
  echo on;
  
  v1=sin(2*pi*f1*t);
  v2=sin(2*pi*f2*t);
  r1c(1)=r(1)*u1(1);
  r1s(1)=r(1)*v1(1);
  r2c(1)=r(1)*u2(1);
  r2s(1)=r(1)*v2(1);
 for k=2:N; 
    r1c(k)= r1c(k-1)+r(k)*u1(k);
    r1s(k)= r1s(k-1)+r(k)*v1(k);
    r2c(k)= r2c(k-1)+r(k)*u2(k);
   r 2s(k)= r2s(k-1)+r(k)*v2(k);
echo off;
  end;
echo on;
  
r1=r1c(5000)^2+ r1s(5000)^2;
r2=r2c(5000)^2+ r2s(5000)^2;