Variable-cutoff two-dimensional lowpass f.i.r. digital filters
- 6 July 1978
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 14 (14) , 422-423
- https://doi.org/10.1049/el:19780283
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
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