优化这段代码 [At,Ph,A2]=EnvelopPhase(X,f0,fs); HX=imag(hilbert(X)); [M,N]=size(X); t=0:1/fs:((N-1)/fs); Ac=X.cos(2pif0t)+HX.sin(2pif0t); As=HX.cos(2pif0t)-X.sin(2pif0t); Ph=atan(As./Ac); A2=Ac.Ac+As.As; At=sqrt(A2); N=10000; f0=10000; delt=400; fs=22000; M=50; al=2; a2=4; a3=8; sitl=pi/6; sit2=pi/4; sit3=pi/3; N1=N-M; xt=randn(1,N1); f1=f0/ fs; df=delt/ fs; ht=fir1(M,[f1-df f1+df]); X=conv(xt,ht); X=X/sqrt(var(X)); t=0:1/fs:((N-1)/fs); X1=X+alcos(2pif0t+sitl); X2=X+a2cos(2pif0t+sit2); X3=X+a3cos(2pif0t+sit3); [Atl,Ph1,A21]=EnvelopPhase(X1, f0, fs); [At2,Ph2,A22]=EnvelopPhase(X2, f0, fs); [At3,Ph3,A23]=EnvelopPhase(X3, f0, fs); LA=0:0.4:12; GA1=hist(Atl, LA); GA2=hist(At2, LA); GA3=hist(At3, LA); plot(LA,GA1,‘:’,LA,GA2,‘-’,LA,GA3,‘–’); title(“包络的分布直方图”); figure; LP=-pi/2:0.05:pi/2; GP1=hist((Ph1-sitl),LP); GP2=hist((Ph2-sit2),LP); GP3=hist((Ph3-sit3),LP); plot(LP,GP1,‘:’,LP,GP2,‘-’,LP,GP3,‘–’); title(“相位的分布直方图”); figure; LA2=0:1:120; GA21=hist(A21,LA2); GA22=hist(A22,LA2); GA23=hist(A23,LA2); plot(LA2,GA21,‘:’, LA2,GA22,‘-’,LA2,GA23,‘–’); title(“包络平方值的分布直方图”);

[At,Ph,A2]=EnvelopPhase(X,f0,fs);
HX=imag(hilbert(X));
t=0:1/fs:(length(X)-1)/fs;
Ac=X.*cos(2*pi*f0*t)+HX.*sin(2*pi*f0*t);
As=HX.*cos(2*pi*f0*t)-X.*sin(2*pi*f0*t);
Ph=atan2(As,Ac);
A2=Ac.^2+As.^2;
At=sqrt(A2);

N=10000;
f0=10000;
delt=400;
fs=22000;
M=50;
al=2;
a2=4;
a3=8;
sitl=pi/6;
sit2=pi/4;
sit3=pi/3;

N1=N-M;
xt=randn(1,N1);
f1=f0/fs;
df=delt/fs;
ht=fir1(M,[f1-df f1+df]);
X=conv(xt,ht);
X=X/sqrt(var(X));
t=0:1/fs:(length(X)-1)/fs;
X1=X+al*cos(2*pi*f0*t+sitl);
X2=X+a2*cos(2*pi*f0*t+sit2);
X3=X+a3*cos(2*pi*f0*t+sit3);

[Atl,Ph1,A21]=EnvelopPhase(X1, f0, fs);
[At2,Ph2,A22]=EnvelopPhase(X2, f0, fs);
[At3,Ph3,A23]=EnvelopPhase(X3, f0, fs);

LA=0:0.4:12;
GA1=histcounts(Atl, LA);
GA2=histcounts(At2, LA);
GA3=histcounts(At3, LA);
plot(LA,GA1,':',LA,GA2,'-',LA,GA3,'--');
title("包络的分布直方图");
figure;

LP=-pi/2:0.05:pi/2;
GP1=histcounts((Ph1-sitl),LP);
GP2=histcounts((Ph2-sit2),LP);
GP3=histcounts((Ph3-sit3),LP);
plot(LP,GP1,':',LP,GP2,'-',LP,GP3,'--');
title("相位的分布直方图");
figure;

LA2=0:1:120;
GA21=histcounts(A21,LA2);
GA22=histcounts(A22,LA2);
GA23=histcounts(A23,LA2);
plot(LA2,GA21,':',LA2,GA22,'-',LA2,GA23,'--');
title("包络平方值的分布直方图");