#### First-Order Complex Resonators

For distinct poles, the recursive terms in the complete partial fraction expansion of Eq.(9.2) can be realized as a parallel sum of*complex*one-pole filter sections, thereby producing a

*parallel complex resonator*filter bank. Complex resonators are efficient for processing complex input signals, and they are especially easy to work with. Note that a complex resonator bank is similarly obtained by implementing a diagonalized state-space model [Eq.(G.22)].

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