Digital filter sampling using non-uniform sampling

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

In this paper, a non-uniform sampling algorithm is proposed for one-dimensional bandlimited time varying signals. The main feature of the proposed sampling scheme is that the sampling steps are inversely proportional to signal gradient or slope of the signal. As a result, a smaller sampling step is obtained whenever the gradient is high and vice-versa. Thus, a better representation of the signal is obtained when it is linearly interpolated between the samples. The proposed sampling algorithm is then applied to the design of digital filters using the well-known impulse invariance method. It is shown that the nonuniform sampling allows to design a FIR filter whose length is 14 times shorter than what is obtained with uniform sampling; with both filters having similar characteristiscs. Simulations are provided to show the performance and characteristics of the sampling sequence.
Original languageEnglish
Title of host publicationAEE'07 Proceedings of the 6th conference on Applications of electrical engineering
EditorsMetin Demiralp, Nikos Mastorakis
Place of PublicationWisconsin, USA
PublisherWorld Scientific and Engineering Academy and Society
Pages120-124
ISBN (Print)978-9608457744
Publication statusPublished - 2007
EventAEE'07 Proceedings of the 6th conference on Applications of electrical engineering -
Duration: 1 Jan 2007 → …

Conference

ConferenceAEE'07 Proceedings of the 6th conference on Applications of electrical engineering
Period1/01/07 → …

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