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This dissertation tells that in the engineer’s daily work on dealing with Digital Signal Processing (DSP) for clients, he is often faced with several challenges that hinder the successful implementation of his task. The challenges come in diverse forms but one of such common challenges in the engineer dealing with digital signal processing has to do with system specification problems. These system specification failures often cause symmetric FIR filters in the entire software being used in the work not to function or work as it should. In a situation like this, most experts suggest a reduction in passband ripple or the increase in stopband attenuation. The fact of the situation however remains that the engineer is not always privileged to have access to any filter design software at his disposal to enable the reduction of passband ripple or the increment of the stopband attenuation. The latter scenario always happens and most engineers are always confused and limited in ideas. It is for typical situations like this that the researcher has put this research work together to serve as a catalyst for coming out with workable interventions that can be fallen upon in hard times such as the one described in the scenario. Though the researcher admits that the problem may be confronting and highly frustrating, it comes with a number of solutions, one of which is the practice of making do with the existing filter and sharpening it. This therefore brings to the floor, the issue of digital filter sharpening in handling system specification failure cases in basic engineering. ...
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The paper adopts an original method, which will be restricted to linear phase FIR prototypes for producing high standard and quality filters, evaluates the weaknesses of filter sharpening, examines the possibility of double filter sharpening as a procedural act for improving filter performance…
Author : andersonruby

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