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1、.Chapter 88.1Solution:Y ( jw )2 X ( j (ww0 )y(t)2x(t )ejw 0tthat is x(t )1y(t )e jw0 t2x(t)y(t )m(t )1jw tm(t )e08.3Solution:According to the conditions as given, we will see:Suppose X ( jw )is:Then, ifp(t ) passes through the ideal lowpass filter whose frequency response H ( j)with cutofffrequency2
2、000,we will getY( jw )P( j) H ( j)0 , that isy(t)0 .Soy(t )0 .8.22Solution:According to the conditions as given, we will get :8.28Solution:the system about the implantation of single-sideband modulation is:(a). According to the conditions as given, we will get :.(b). According to the conditions as given, we will get :.From (a) and (b), we know only the upper sideband are retained.