mf3_fig.m

调制识别：基于决策论的通信信号调制识别实现

clear;fb=500;fc=2000;fs=12000;Ac=1;f1=500;f2=1000;f3=1500;f4=2000;f4=2000;f5=750;f6=1250;f7=1750;f8=2250;
for i=1:30
    for k=1:100
         d4=randint(1,300,4);d8=randint(1,300,8);
         s2=fsk4(d4,fb,f1,f2,f3,f4,fs,Ac);s3=fsk8(d8,fb,f1,f2,f3,f4,f5,f6,f7,f8,fs,Ac);
         ss2=awgn(s2,i,'measured');ss3=awgn(s3,i,'measured');
         Maf32(k)=Mf3_func(ss2,fs,Ac);Maf33(k)=Mf3_func(ss3,fs,Ac);
    end
    Mf32(i)=mean(Maf32);Mf33(i)=mean(Maf33);
end
plot(Mf32,'-*');hold on
plot(Mf33,'-^')
xlabel('snr');ylabel('Mf3');
grid
legend('fsk4','fsk8',0);