FIR數(shù)字濾波器的簡化格型實現(xiàn)
SIMPLIFIED LATTICE REALIZATION OF FIR DIGITAL FILTERS
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摘要: 格型濾波器在數(shù)值計算性能和結(jié)構(gòu)的模塊化等方面都優(yōu)于直接型,但實現(xiàn)起來較復(fù)雜。本文提出一種實現(xiàn)PIR數(shù)字濾波器的簡化格型結(jié)構(gòu),它所需的硬件設(shè)備量只有常規(guī)格型實現(xiàn)時的一半,與直接型實現(xiàn)時相當(dāng)。文中給出了從直接型到簡化格型的綜合算法。并對線性相位FIR數(shù)字濾波器的格型綜合算法作了簡化。用實例演示了本文的主要結(jié)論。
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關(guān)鍵詞:
- 濾波器; FIR數(shù)字濾波器; 格型濾波器
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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