DocumentCode :
1644001
Title :
Analytical methods for the design of 2-D circularly symmetric digital filters using McClellan transformation
Author :
Nagamuthu, N. ; Swamy, M.N.S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada
fYear :
1989
Firstpage :
1095
Abstract :
Analytical methods are developed for choosing the coefficients of the first-order McClellan transformation for the design of two-dimensional (2-D) circularly symmetric digital filters from one-dimensional digital filters. New, extremely simple formulas for finding the original and the scaling free coefficients are presented. They are derived by forcing the lower-order significant terms in the power series expansion of the linear error function to zero. Formulas are also derived for finding N-D McClellan´s coefficients for the design of N-D approximately spherically symmetric digital filters. Many examples are provided to demonstrate the application of the formulas. The coefficients obtained approximate a circular contour with a higher degree of accuracy than the McClellan coefficients. The number of multiplications required to implement the designed filters is shown to be small. The formulas are very useful for real-time adaptive filter design and filtering by low-cost, stand-alone 2-D signal processors
Keywords :
two-dimensional digital filters; 2-D circularly symmetric digital filters; McClellan transformation; analytical methods; digital filter design; linear error function; number of multiplications; power series expansion; real-time adaptive filter design; scaling free coefficients; simple formulas; spherically symmetric digital filters; stand-alone 2-D signal processors; Adaptive filters; Costs; Design methodology; Digital filters; Filtering; Finite impulse response filter; IIR filters; Image restoration; Radar signal processing; Smoothing methods;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 1989., IEEE International Symposium on
Conference_Location :
Portland, OR
Type :
conf
DOI :
10.1109/ISCAS.1989.100543
Filename :
100543
Link To Document :
بازگشت