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FIR Filter Sharpening by Frequency Masking and Pipelining-Interleaving TechniqueCIRIC, M. P. , RADONJIC, V. M. , KRNETA, R. R. , STEFANOVIC, N. J.
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digital filters, field programmable gate arrays, FIR filters, filtering theory, programmable logic devices
signal(11), digital(11), filter(10), processing(9), systems(5), circuits(5), response(4), point(4), masking(4), filters(4)
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About this article
Date of Publication: 2014-11-30
Volume 14, Issue 4, Year 2014, On page(s): 65 - 72
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2014.04010
Web of Science Accession Number: 000348772500010
SCOPUS ID: 84921680587
This paper focuses on the improvements of digital filters with a highly sharp transition zone on the Xilinx FPGA chips by combining a sharpening method based on the amplitude change function and frequency masking and PI (Pipelining-Interleaving) techniques. A linear phase requires digital filter realizations with Finite Impulse Response (FIR) filters. On the other hand, a drawback of FIR filters applications is a low computational efficiency, especially in applications such as filter sharpening techniques, because this technique uses processing the data by repeated passes through the same filter. Computational efficiency of FIR filters can be significantly improved by using some of the multirate techniques, and such a degree of computation savings cannot be achieved in multirate implementations of IIR (Infinite Impulse Response) filters. This paper shows the realization of a filter sharpening method with FIR filters combined with frequency masking and PI (Pipelining-Interleaving) technique in order to effectively realize the filter with improved characteristic. This realization at the same time keeps the good features of FIR filters such as the linear phase characteristic.
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