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首页> 外文期刊>Australian journal of electrical and electronics engineering >New design approach of three-dimensional IIR notch filter using all-pass sections
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New design approach of three-dimensional IIR notch filter using all-pass sections

机译：全通截面三维IIR陷波滤波器的新设计方法

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This paper investigates the design problem of a multidimensional IIR notch filter. To address this issue, a 3-D recursive digital notch filter is considered. A closed-form analytical solution of the notch filter is firstly derived and used for its realisation. The latter is achieved through two types of filters: ⅰ) a 3-D IIR straight line filter and ⅱ) 3-D IIR filter with order 1×1×1 based on all-pass sections. The straight-line filter is designed by frequency transformation of 3-D analogue prototype filter where a prescribed notch frequency is localised. The IIR filter is realised in proposed lattice structure as a cascade of all-pass sections where the 3-dB bandwidth of the notch filter can be adjusted by the lattice coefficient of the IIR filter independently.
机译：本文研究了多维IIR陷波滤波器的设计问题。为了解决这个问题，考虑了3-D递归数字陷波滤波器。陷波滤波器的闭合形式解析解首先被导出并用于实现。后者是通过两种类型的滤波器实现的：ⅰ）3-D IIR直线滤波器和ⅱ）3-D IIR滤波器（基于全通截面，阶数为1×1×1）。直线滤波器是通过对3D模拟原型滤波器进行频率变换而设计的，在该滤波器中定位了规定的陷波频率。 IIR滤波器在建议的晶格结构中实现为全通段的级联，其中陷波滤波器的3 dB带宽可以通过IIR滤波器的晶格系数独立进行调整。

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