标题: 介绍一下MATLAB 的Rational Transfer Function(有理传递函数) [打印本页] 作者: mytomorrow 时间: 2020-7-6 17:14 标题: 介绍一下MATLAB 的Rational Transfer Function(有理传递函数) " N8 c f9 {6 b$ Q. n
这算是学习MATLAB中的函数filter需要提前知道的理论基础知识,如果学过数字信号处理一定不会陌生,甚至能信手拈来。 ! ]1 Z0 J- G. O- Y 0 j; C1 Q" Q/ J其实英文版已经能看了,如果觉得不方便,那么最后也给出中文版。 6 L7 M" C$ `; N( C/ Z # T6 @0 |4 I1 c$ ?6 }英文版: - e# l0 j+ x1 y8 l8 _' fRational Transfer Function - [& i. g1 [, a t9 m/ n- q) cThe input-output description of the filter operation on a vector in the Z-transform domain is a rational transfer function. A rational transfer function is of the form,1 M- C& I+ r, @# P& t
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0 z; o7 _- ?0 y/ y# \$ Ewhich handles both FIR and IIR filters [1]. na is the feedback filter order, and nb is the feedforward filter order.3 y$ J7 }+ b5 D; s
8 e; m" O0 u5 u6 a, g' E1 EYou also can express the rational transfer function as the following difference equation, " m( x0 O; h6 R1 F2 f/ o$ V # j7 t ^: L$ H4 c5 }9 W
S4 v2 Y8 E5 O# ~Furthermore, you can represent the rational transfer function using its direct form II transposed implementation, as in the following diagram. Due to normalization, assume a(1) = 1. ( R3 A8 H# `2 Q/ `# j7 L 4 ]: {/ G+ ^" ^- a) W! Y3 @