fir_filter_design's Introduction

FIR_Filter_Design

This is an individual project for EN2570 - Digital Signal Processing module in department of Electronic and Telecommunication Engineering.
Final goal of this project is to design and implement an FIR bandpass digital filter under given specifications.
A bandpass filter attenuates all the frequencies except a band of frequencies which we are wanted to obtain in the output.
Digital filters are used almost everywhere in telecommunication field.
Although there are many methods to design digital filters with various accuracies, here we are only looking at the Fourier Series method with Kaiser window which is a direct method of filter designing.
In this process, the infinite impulse response of the ideal filter is truncated with the Kaiser window in time domain.
The filter is implemented using MATLAB R2018a and plots are used for analyzing purposes.
Filter Visualization Tool (‘fvtool’) in MATLAB is very useful in plotting results.
Discrete Fourier Transform (DFT) and Fast Fourier Transform (FFT) algorithms have been used to analyze the filter output for the input excitation signal.

Recommend Projects