REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

FIR Filter Sharpening by Frequency Masking and Pipelining-Interleaving Technique

Milenko ČiriĆ

Technical Overhaul Works “Čačak”, Čačak, cciro@bluenet.rs

Vojkan RadonjiĆ

Technical Overhaul Works “ Čačak”, Čačak, vojkan.r69@gmail.com

Abstract: 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.

Keywords: Digital filters, Field programmable gate arrays, FIR filters, Filtering theory, Programmable logic devices.