FIR

TFilter

Synopsis: 
A web application for designing linear-phase FIR filters

Optimal Design of Minimum-Phase FIRs

"We present a generalized optimal minimum phase digital FIR filter design algorithm that supports (1) arbitrary magnitude response specifications, (2) high coefficient accuracy, and (3) real and complex filters."

Synopsis: 
Optimal design of real/complex minimum-phase FIR filters
Author(s): 
Damera-Venkata and Evans

Digital Signal Processing Tutorial

Synopsis: 
Java applets for digital filter design

ScopeFIR

ScopeFIR can design and analyze Finite Impulse Response (FIR) filters using the Parks-McClellan algorithm and a variety of other methods.

Synopsis: 
FIR filter design software for Windows
Author(s): 
Iowegian International

DSP Trick: FIR Filtering in C

Subject: DSP Trick: Filtering
From: rainer.storn@infineon.com
Date: 1999/04/21
Newsgroups: comp.dsp
THIS WORK IS PLACED IN THE PUBLIC DOMAIN

Name: Filtering in C

Category: Programming Trick

Application: FIR-Filtering

Advantages: Simple and fast

Introduction:

This is more like a trick in C but might also be applicable in DSP environments. It allows to compute FIR-filtering in a fast manner when the filter length contains a factor of, let's say 4 (other factors are also possible).

How to Design Minimum-Phase FIR Filters

How to Design Minimum-Phase FIR Filters

by Matt Donadio

Like most things in DSP, there are several methods to create minimum-phase Finite Impulse Response (FIR) filters.

FIR Filter Implementation

4.1 What is the basic algorithm for implementing FIR filters?

Structurally, FIR filters consist of just two things: a sample delay line and a set of coefficients. To implement the filter:

FIR Filter Design

3.1 What are the methods of designing FIR filters?

The three most popular design methods are (in order):

FIR Filter Properties

2.1 Linear Phase

2.1.1 What is the association between FIR filters and "linear-phase"?

Most FIRs are linear-phase filters; when a linear-phase filter is desired, a FIR is usually used.

FIR Filter Basics

1.1 What are "FIR filters"?

FIR filters are one of two primary types of digital filters used in Digital Signal Processing (DSP) applications, the other type being IIR.

1.2 What does "FIR" mean?

"FIR" means "Finite Impulse Response".  If you put in an impulse, that is, a single "1" sample followed by many "0" samples, zeroes will come out after the "1" sample has made its way through the delay line of the filter.

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