开始n=0PI=3.1415926,N=1025,fc=1000,HI1=HQ1=HI2=HQ2=0,输入f0,f1,fs,U,I,xw[n]=0.-0.46cos(2PIn/(N-1))h[n]=hd[n]w[n]n=n+1hd[n]=2fc/fsYNc=2PIfc(n-(N-1)/2)/fshd[n]=2fcsin(c)/(fsc)YX=xPI/180,n=0N>n?n=(N-1)/2?Na=2PIf0n/fsb=2PIf1n/fsu[n]=Ucos(a)i[n]=Icos(a+x)SI[n]=cos(b)SQ[n]=sin(b)n=n+1n=0YN>n?NN>n?n=0YNP=2(HI1HI2+HQ1HQ2)Q=2(HQ1HI2-HI1HQ2)S=UI/2y=P/SHI1=HI1+UI[n]h[n]HQ1=HQ1+UQ[n]h[n]HI2=HI2+II[n]h[n]HQ2=HQ2+IQ[n]h[n]n=n+1UI[n]=u[n]SI[n]UQ[n]=u[n]SQ[n]II[n]=i[n]SI[n]IQ[n]=i[n]SQ[n]n=n+1YNN>n?输出P,Q,S,y结束
