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On digital filtering of band-limited signals using lower sampling rates

Tzvetkov, Kostadin and Tarczynski, Andrzej (2010) On digital filtering of band-limited signals using lower sampling rates. Journal of Computers, 5 (10). pp. 1486-1493. ISSN 1796-203X

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Official URL: http://dx.doi.org/10.4304/jcp.5.10.1486-1493

Abstract

Filtering of multi-band bandlimited signals by means of a linear digital filter with one or more stopbands is explored. The main goal of the paper is to demonstrate that such a task can be accomplished using sampling rates lower than Landau rate, where the Landau rate is defined as the total bandwidth of the input signal. In order to reach such low rates Periodic Nonuniform Sampling is employed. We show that the proposed filtering method is most efficient when bandpass and multiband filtering is required. Necessary and sufficient conditions for filtering are derived, and an algorithm for designing PNS grids that allow sub-Landau sampling and filtering is proposed. Reconstruction systems are discussed and experimental examples are presented, which confirm the feasibility of the approach.

Item Type:Article
Research Community:University of Westminster > Electronics and Computer Science, School of
ID Code:8785
Deposited On:04 Nov 2010 12:02
Last Modified:04 Nov 2010 12:02

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