www.gusucode.com > 调制识别 基于决策论的通信信号调制识别实现matlab源码程序 > moulation classification/key feature simulink/judge.m
function result=judge(s,fs,fc) %利用六个参数对输入信号的调制方式进行判决 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%门限值 t_m11=0.325;t_m12=0.195;t_m2=0.306;t_mf1=0.1815; t_mf2=0.4185;t_mp1=0.395;t_mp2=0.404; %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% h=hilbert(s); a1=A_func(h); M1=M_func(a1); if M1>=t_m11 a2=A_func(a1);M2=M_func(a2); if M2>=t_m2 result=2; %代表4ASK信号 else result=1; %代表2ASK信号 end elseif M1>=t_m12 result=3; %代表16QAM信号 else f=dif(h,fs);Mf1=M_func(A_func(f)); if Mf1>=t_mf1 f0=f0_func(f);Mf2=M_func(A_func(f0)); if Mf2>=t_mf2 result=5; %代表4FSK信号 else result=4; %代表2FSK信号 end else fai=fai0_func(h,fs,fc); p1=A_func(fai);Mp1=M_func(p1); if Mp1>=t_mp1 Mp2=M_func(A_func(p1)); if Mp2>=t_mp2 result=8; %代表8PSK信号 else result=7; %代表4PSK信号 end else result=6; %代表2PSK信号 end end end