5.1.2 Illustration of Effects of Group Delay and Attenuation Frequency Response of the system 2 Figure 5.3 -2 "wrapped"phase ARG [H(i)] -0.8m-0.6m-0.4m 0.2m 0 0.2m 0.4r 0.6m 0.8m (a)Principle Value of Phase Response: 60 是全通系统作用 5.5 all-pass system zeros:=1/Ck=1/0.95eFj(157+.02k) poles:=Ck=0.95ej(157+.02nk) -40 k=1.2,3,4. -0.8r-0.6m -0.m4-0.2m0 0.2r 0.4r 0.6m 0.8r (b)Unwrapped Phase Response -023n-0.17 0.17 023m5.1.2 Illustration of Effects of Group Delay and Attenuation (a) Principle Value of Phase Response: (b) Unwrapped Phase Response Figure 5.3 24 -0.23π-0.17π 0.17π0.23π Frequency Response of the system 是全通系统作用 5.5 all-pass system zeros: poles: "wrapped" phase ARG [H(e j )]