Consider a signal s[n] that we model as the impulse response of an all-pole system of order p. Denote the system function of the pth-order all-pole model as H(p)(z) and the corresponding impulse response as h(p)(z). Denote the inverse of H(p)(z) as H(p)inv (z) =1/H(p)(z). The corresponding impulse response is given by
where g(p)[n] is the output of the filter when the input is s[n].
(a) Figure P11.9 depicts a signal flow graph of the lattice filter implementation of the impulse response at n = 1.
(b) Suppose we now wish to model the signal s[n] as the impulse response of a 2nd-order all-pole filter. Draw a signal flow graph of the lattice filter implementation of
(c) Determine the system function of the 2nd-order all-pole filter.
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