2FSK调制与解调的程序(共5页).docx

精选优质文档-倾情为你奉上fs=2000; %抽样频率dt=1/fs;f1=20; %定义两列载波的频率f2=100;a=round(rand(1,10); %产生二进制随机序列g1=a;g2=a;g11=(ones(1,2000)*g1; %产生方波信号g1a=g11(:); g21=(ones(1,2000)*g2;g2a=g21(:);t=0:dt:10-dt;t1=length(t);tuf1=cos(2*pi*f1.*t)tuf2=cos(2*pi*f2.*t)subplot(311)n=0:9;x=square(1,50);stem(0:9,a*x);grid;xlabel(二进制随机序列)ylabel(幅度)subplot(312);plot(t,tuf1);title(频率为f1的余弦波)ylabel(幅度)subplot(313);plot(t,tuf2);title(频率为