FPGA Schematic Implementations and Comparison of FIR Digital Filter Structures

Year 2018, Volume: 6 Issue: 1, 20 - 28, 15.02.2018

Oğuzhan Coşkun , Kemal Avcı

https://doi.org/10.17694/bajece.369234

Cited By: 1

Abstract

In this study, we investigate the FPGA schematic
implementations of finite impulse response (FIR) digital filters for three
fundamental structures on Altera DE2-115 board without requiring any other
software packages such as DSP Builder and Matlab Simulink. First of all, a low
pass FIR digital filter is designed by using Matlab filter design and analysis
tool (fdatool) program. Then, the designed filter is implemented and simulated
on Matlab for a given input signal. After that, for three fundamental structures
(namely direct-form, transposed direct-form, and symmetric direct-form) in
literature, the designed filter is implemented schematically on Quartus-II
software and then each project containing different structure implementation is
compiled. Then, the digital filters implemented by each structure are simulated
by University Program Vector Wave File (VWF) simulation program on Quartus-II
software. Simulation results show that the obtained results are the same as the
ones obtained on Matlab, which confirms that the schematic designs are
successfully implemented. Moreover, the implemented digital filters are
realized and successfully tested on Altera DE2-115 FPGA board. Finally, three
fundamental FIR structures for various filter lengths from 11 to 51 are
implemented to compare them in terms of total logic elements, total registers,
and total memory.

Keywords

Altera DE2-115, FIR filter, FPGA, Matlab, Quartus-II

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