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h[n]=-h[M-n] h[n]=h[M+n] h[n]=-h[M-n+1] h[n]=h[M-n+1]
H1=0.30H,N1=0.3N H1=0.42H,N1=0.27N H1=0.56H,N1=0.42N H1=0.72H,N1=0.61N
当n>0时,h(n)=0 当n>0时,h(n)≠0 当n<0时,h(n)=0 当n<0时,h(n)≠0
h(n)=δ(n)+2δ(n-1)+δ(n-2) h(n)=δ(n)+2δ(n-1)+2δ(n-2) h(n)=δ(n)+2δ(n-1)-δ(n-2) h(n)=δ(n)+2δ(n-1)+3δ(n-2)
A﹑N1/N2=K/Z B﹑N1*N2=K*Z C﹑N2/N1=K/Z D﹑N1/N2=K*Z
H(ejω)=ejω+ej2ω+ej5ω H(ejω)=1+2e-jω+5e-j2ω H(ejω)=e-jω+e-j2ω+e-j5ω H(ejω)=1+e-jω+e-j2ω
H1/H2=N2/N1 H2/H1=N2/N1 H2/H1=(N2/N1)3 H2/H1=(N2/N1)2
h(n)=δ(n) h(n)=u(n) h(n)=u(n)-u(n-1) h(n)=u(n)-u(n+1)
h(n)=u(n) h(n)=u(n+1) h(n)=R4(n) h(n)=R4(n+1)