Question

(Please give all the solutions and steps, if you give the answer by picture please post a clear picture. Please don't answer the question if you can't do all the questions, THANKS).

0.1 22. The first zero-crossing bandwidth of the signal shown above is a)5Hz b) 10 Hz c) 15 Hz d) 20 Hz e) none above 23. The Hilbert transform of the Hilbert transform of x(t) is a) x(t)(t) b) -x(t) c)jx(t d)-jx(t) e) none above 24. A system with input x(t) and output y(t) x(t)*h(t) and impulse response h(t) 0.18(t-2) is a) distortionless b) nonlinear c) time invariant d) none above 25. In the system shown below with complex-valued output y(t), with input spectrum M(f) and output magnitude spectrum IY(MI, the filter F1 below has frequency response H( a) 11( 1120-1) b) Π( f/20-20) c) Π( f/40-1) d) Π(M40-40) e) none above F1 M(f) y(t) m(t) H(f) Cos(40)0 40 -40 40

Answer 1