摘要
提出了一种设计二维递归扇形滤波器的新方法,使用奇数阶模拟椭圆滤波器作为一维原型导出了由全通节构成的互补象限扇形滤波器,根据坐标变换得到了互补90°扇形滤波器的转移函数.本文还讨论了零相位互补扇形滤波器的设计.与已有的设计方法相此,大大减少了扇形滤波器的系数并简化了其实现结构.
This paper presents a new approach for designing 2-D recursive fan filters.The complementary fan filters consisting of all-pass sections are achieved by using odd-ordered continuous elliptical filter and the complemen- tary 90° fan filters are designed based on the coordinate transformation. The design of zero-phase fan filters are also discussed.This algorithm results in a great reduction of multiplications and simplifies the realization structure of fan filters as compared with the published design procedures.
出处
《东南大学学报(自然科学版)》
EI
CAS
CSCD
1990年第6期17-23,共7页
Journal of Southeast University:Natural Science Edition
关键词
数字滤波器
滤波算法
递归滤波方法
digital filters
filter algorithm
recursive filtering methods