摘要
本文对梯形窗函数的频率特性进行了详细地推导,得出梯形窗函数的频率特性表达式。与目前常用的几种窗函数的频率特性相比较,其性能优于改进的升余弦窗函数。
This paper de rived the frequcncy characteristic of the trapezoid-window function, the amplitude-freqency characteristic expressions were achieved. Compared with the amplitude-frequency characteristic of the window functions often used at present, its property has an advantage over the rising-cosine function improved.
关键词
数字滤波器
梯形窗函数
幅频特性
trapezoid-window function, amplitude-frequency characteristic, mainlobe width, sidelobc decay
