Design of variable Laguerre filters
Design of variable Laguerre filters
复制标题
可变拉盖尔滤波器的设计
DOI：
10.1109/iscas.2002.1010480
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
S. Abeysekera
中科院分区：
文献类型：
--
作者：
D. Tay;S. Abeysekera
可变滤波器是频率特性可以连续变化以适应当前应用的滤波器。改变特性必须容易地实现，而不必求助于重新设计滤波器。光谱参数用于控制滤波器的特性。本文讨论了变特性IIR拉盖尔滤波器的设计问题。拉盖尔滤波器的稳定性可以很容易地保证，这使得设计比传统的IIR滤波器更容易。该设计技术利用最近报道的频率变换方法固定拉盖尔滤波器和多项式曲线拟合建模的可变滤波器的系数。给出了变带宽窄带滤波器的设计实例。
Variable filters are filters whose frequency characteristics can be continuously changed to suit the application at hand. The changing characteristics must be achieved readily without having to resort to redesigning the filter. Spectral parameters are used to control the filter's characteristics. In this paper the design of IIR Laguerre filters with variable characteristics is addressed. The stability of Laguerre filters can be easily ensured which makes the design easier than that for traditional IIR filters. The design technique utilises the recently reported frequency transformation method for fixed Laguerre filters and polynomial curve fitting for modelling the coefficient of the variable filters. Design examples of variable bandwidth narrowband filters are given.