Reference
Raised-Cosine and Root-Raised-Cosine Formulas
Raised-Cosine (RC) and Root-Raised-Cosine (RRC) filters are commonly used in digital data modems. Here, we provide design formulas for these filters.
Notes:
- Each version of the same formula is algebraically equivalent; they just use different parameters.
- The impulse response formulas include a "sinc(x)" term, that is, "sin(x)/x". Although "sinc(0)" seemingly includes a divide-by-zero, L'Hospital's rule indicates that the numeric value of sinc(0) is 1.0.
The Culture of comp.dsp
As best anybody can tell, the comp.dsp newsgroup doesn't have a charter which describes what it is supposed to be. But if you think of a newsgroup as a "cocktail party", what really matters is not its "charter" but its "personality", that is, its "culture".
How to Search the comp.dsp Archives
You can search the comp.dsp archives via Google's "Group" search features. Google provides two search interfaces: a basic search and an advanced search.
- The basic search is available at groups.google.com.
- The advanced search is much more…well…advanced. It has lots of u
A Call for Tricks
On April 17, 1999, in the post below, Rick Lyons issues "A Call for DSP Tricks":
Well Guys,
We have a plan on how we'll collect, compile, and display any clever DSP Tricks that you'd like to share with other DSP practitioners.
Usenet terms, acronyms and symbols
Here we define some terms, acronyms and symbols which commonly appear on Usenet
Terms
Here are a few important Usenet terms (borrowed from the The New Hacker's Dictionary).
the unofficial comp.dsp home page
comp.dsp is the Usenet newsgroup devoted to sharing information about Digital Signal Processing.
Digital Filter Terminology
From: R. G. Lyons, UNDERSTANDING DIGITAL SIGNAL PROCESSING, (Appendix F - pages 494-505). © 1997 by Addison Wesley Longman Inc., Reproduced by permission of Addison Wesley Longman. All rights reserved.
The first step in becoming familiar with digital filters is to learn to speak the language used in the filter business.
