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本文分析了FIR数字滤波器的幅频特性中极值点的分布规律,探讨了改善McClellan程序的设计效率的方法。其基本出发点,是将原程序中均匀设置的极值频率初始估计值改为非均匀设置。文中用设计实例说明了该方法可以大大缩短程序的运行时间。
This paper analyzes the distribution rule of the extremum points in the amplitude-frequency characteristics of the FIR digital filter, and discusses the method to improve the design efficiency of the McClellan program. The basic starting point is to change the initial estimate of the extreme frequency uniformly set in the original program to a non-uniform setting. The design example shows that this method can greatly shorten the running time of the program.