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Notes on the Design of Optimal FIR Filters
(col10553)
Author:
John Treichler
Keywords:
digital signal processing
,
FIR
,
FIR digital filters
,
Parks-McClellan
Summary:
A recurring technical task development of digital signal processing products and systems is the design of FIR digital filters. Fortunately some excellent software packages exist for the automatic synthesis of impulse responses for such filters, many of them based on the now-famous Parks-McClellan algorithm. Unfortunately, there is still ... is used.
[Expand Summary]
A recurring technical task development of digital signal processing products and systems is the design of FIR digital filters. Fortunately some excellent software packages exist for the automatic synthesis of impulse responses for such filters, many of them based on the now-famous Parks-McClellan algorithm. Unfortunately, there is still some mystery about how to use the software and, equally important, how to estimate impulse response lengths short of actually designing the filter itself. This technical note primarily addresses the second problem and indirectly discusses a bit the first. We examine here how to convert a typical filter specification in terms of cutoff frequency, passband ripple, etc., into a reasonably accurate estimate of the length of the impulse response. Not only does this estimate suffice for most design tradeoff exercises, it usually allows the Parks-McClellan routines to be employed only once or twice rather than the multiple times needed when the “cut-and-try" method is used.
[Collapse Summary]
Subject:
Science and Technology
Language:
English
Popularity:
87.78%
Revised:
2009-09-14
Revisions:
3
Impulse Response Measurement Toolbox
(col10519)
Authors:
Edgar Berdahl
,
Julius Smith
Institution:
CCRMA, Stanford University
Keywords:
frequency response measurement
,
Golay code
,
impulse response measurement
,
swept sine
,
system identification
Summary:
The Impulse Response Measurement Toolbox is a simple, convenient, and free open-source solution for measuring impulse responses, magnitude spectra, and phase spectra of single-input, single-output (SISO) linear systems. Two impulse-response measurement methods are explained and demonstrated. The Golay code measurement technique is particularly robust to additive ... weak nonlinearities.
[Expand Summary]
The Impulse Response Measurement Toolbox is a simple, convenient, and free open-source solution for measuring impulse responses, magnitude spectra, and phase spectra of single-input, single-output (SISO) linear systems. Two impulse-response measurement methods are explained and demonstrated. The Golay code measurement technique is particularly robust to additive white noise, while the swept sine measurement technique is robust to weak nonlinearities.
[Collapse Summary]
Subject:
Science and Technology
Language:
English
Popularity:
69.06%
Revised:
2008-06-23
Revisions:
5
Popularity is measured as percentile rank of page views/day over all time
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