Graphics/Photos

SOCR - Statistics Online Computational Resource for Education and Research

Collection: 
Individual Authors
Author: 
Ivo D. Dinov, Nicolas Christou
Year: 
0
Conditions of Use: 
GNU Free Documentation License
Description: 
The goals of the Statistics Online Computational Resource (SOCR) are to design, validate and freely disseminate knowledge. The Resource specifically provides portable online aids for probability and statistics education, technology based instruction and statistical computing. SOCR tools and resources include a repository of interactive applets, computational and graphing tools, instructional and course materials.

Cßc khßi ni?m co b?n c?a Internet

Collection: 
Connexions
Author: 
Do Ngoc Minh
Year: 
0
Language: 
Vietnamese
Conditions of Use: 
Creative Commons Attribution 2.0
Material Type: 

Notes on the Design of Optimal FIR Filters (John Treichler)

Collection: 
Connexions
Author: 
John Treichler
Year: 
2009
Conditions of Use: 
Creative Commons Attribution 4.0 License.
Material Type: 
Other Categories: 
Description: 
A recurring technical task in the development of digital signal processing products and systems is the design of finite-impulse-response (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 [2]. 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.

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