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华南理工大学电子与信息学院:《数字信号与处理》(英文版)Lecture 12 Linear-Phase fr Transfer Functions

It is nearly impossible to design a linear￾phase IIR transfer function It is always possible to design an FIR transfer function with an exact linear-phase response Consider a causal FIR transfer function H(z) of length N+1, i.e., of order N:
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