Title :
Variable-cutoff two-dimensional lowpass f.i.r. digital filters
Author :
Ahuja, S.S. ; Dutta Roy, Suhash C.
Author_Institution :
Indian Institute of Technology, Department of Electrical Engineering, New Delhi, India
Abstract :
A recently formulated transformation for implementing 1-dimensional variable-cutoff filters is extended to the design of 2-dimensional variable-cutoff lowpass filters, and it is shown that the cutoff frequencies along the two frequency axes can be independently controlled, each by one parameter. The filters designed with the 1st-order transformation have certain drawbacks, which are shown to be overcome with the 2nd-order transformation with proper constraints on the variable parameters.
Keywords :
low-pass filters; two-dimensional digital filters; FIR digital filters; linear phase filters; two dimensional variable cutoff lowpass filters;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19780283
