a. If h1[n] and h2[n], the impulse responses of two LTID systems are related by h2[n] = (−1)nh1,[n], then show that
How are the frequency response spectrum H2[ejΩ] related to the H1[ejΩ].
b. If H1 [z] represents an ideal low pass filter with cutoff frequency Ωc, sketch H2[ejΩ]. What type of filter is H2[ejΩ]?