By Topic

Algorithm for the reduction of the order of recursive digital filters

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Rousogiannakis, P. ; Imperial College, London, U.K. ; Ahmadi, M. ; King, R.A.

Recursive digital filters of high order are necessary to provide a sharp cut-off response; the implementation of these necessarily involves high cost. This paper presents an algorithm for the design of lower order filters whose amplitude response approximates those of higher order filters. The algorithm makes use of the phase correction technique PCT 1 applied to the numerator and denominator of the filter separately and the filter is then stabilized, using the technique of 2. The algorithm is iterative in nature, the error being defined as the integral of the squared difference between the frequency response of the high and low order filter. Convergence of the algorithm is discussed and examples show that the error decreases within the first few iterations and then remains practically constant.

Published in:

Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '77.  (Volume:2 )

Date of Conference:

May 1977