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One Method for Design of Narrowband Lowpass Filters

One Method for Design of Narrowband Lowpass Filters
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Author(s): Gordana Jovanovic-Dolecek (National Institute of Astrophysics Optics and Electronics (INAOE), Mexico)and Javier Diaz-Carmona (Technology Institute of Celaya, Mexico)
Copyright: 2003
Pages: 14
Source title: Practicing Software Engineering in the 21st Century
Source Author(s)/Editor(s): Scott J. Lloyd (University of Rhode Island, USA)and Joan Peckham (University of Rhode Island, USA)
DOI: 10.4018/978-1-93177-750-6.ch017

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Abstract

This chapter describes a design of a narrowband lowpass finite impulse response (FIR) filter using a small number of multipliers per output sample (MPS). The method is based on the use of a frequency-improved recursive running sum (RRS), called the sharpening RRS filter, and the interpolated finite impulse response (IFIR) structure. The filter sharpening technique uses multiple copies of the same filter according to an amplitude change function (ACF), which maps a transfer function before sharpening to a desired form after sharpening. Three ACFs are used in the design, as illustrated in the accompanying examples.

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