• 1. Recursive Difference Equation: 递归差分方程 | 递回差分方程式
• 2. First order recursive difference equation: 一阶递归差分方程

• 1.Based on the relationship between the group delay function and the cepstral coefficients, the denominator polynomial coefficients can be determined through a nonlinear recursive difference equation.
  该方法是基于最小相位滤波器的复倒谱系数和其群迟延函数以及其系统函数之间的关系，通过一个非线性的递归方程求解分母多项式的系数。
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