FIR数字滤波器的简化格型实现
SIMPLIFIED LATTICE REALIZATION OF FIR DIGITAL FILTERS
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摘要: 格型滤波器在数值计算性能和结构的模块化等方面都优于直接型,但实现起来较复杂。本文提出一种实现PIR数字滤波器的简化格型结构,它所需的硬件设备量只有常规格型实现时的一半,与直接型实现时相当。文中给出了从直接型到简化格型的综合算法。并对线性相位FIR数字滤波器的格型综合算法作了简化。用实例演示了本文的主要结论。
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关键词:
- 滤波器; FIR数字滤波器; 格型滤波器
Abstract: Lattice fitter is superior to its counterpart of direct structure in numerical properties and modularity etc., but it is more complex to realize. This paper suggests a simplified lattice structure for the realization of FIR digital filters, so that the hard-ware requirement is only half as many as that of the conventional lattice filter, comparable to that of the direct structure. The synthesis algorithms that transform the direct structure into the simplified lattice structure are tfiven. Furthermore, the lattice synthesis algorithms for linear phase FIR digital filters are simplified. The main results are illustrated by a practical example. -
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