effect of phase and group delay of a linear system 0.5 narrowband input xn]=s n cos(@on 0.5 Sample number (n) 50 100 150 200 250 300 ◆for a system H(ei),arg[H(eo】≈-4-oa, Group Delay t(@)=n=125 0.5 0 -0.5 Output Sample number (n) 0 50 150 200 250 300 MnHH(eia)s[n-nalcos(a(n-na)) the time delay of the envelope sn]is n=125. 21narrowband input x[n]=s[n]cos(0n)  ( )= = nd 125 the time delay of the envelope s[n] is . nd =125 Group Delay effect of phase and group delay of a linear system 21 ◆for a system H(e j ), arg ,  ( ) 0 j H e nd  − −   ( )   ( ) 0 0 0 [ ] cos( ) d j y n H e s n n n nd =  − −  − Output