Twodimensional variable F.I.R. bandpass filters
Abstract
The cosine transformation cos alpha = A(0) + A(1) cos Omega (where alpha and Omega are frequency variables for the onedimensional prototype and the transformed filters, respectively) is extended to the design of constantcenter frequency/variablebandwidth and constantbandwidth/variablecenterfrequency for circularly symmetric twodimensional FIR bandpass filters. In this method the cutoff frequencies along both frequency axes can be independently controlled by applying McClellan's transformation. A way of obtaining nearly circular symmetric bandpass filters by applying the aforementioned method is also presented.
 Publication:

Electronics Letters
 Pub Date:
 August 1979
 DOI:
 10.1049/el:19790396
 Bibcode:
 1979ElL....15..551A
 Keywords:

 Bandpass Filters;
 Digital Filters;
 Frequency Response;
 Electronics and Electrical Engineering