Re: Modeling digital modulation in Mathematica?
- To: mathgroup at smc.vnet.net
- Subject: [mg117375] Re: Modeling digital modulation in Mathematica?
- From: telefunkenvf14 <rgorka at gmail.com>
- Date: Wed, 16 Mar 2011 06:29:40 -0500 (EST)
- References: <email@example.com>
On Mar 14, 6:02 am, Robert Knighten <R... at knighten.org> wrote: > I would like to know of resources for modeling various kinds of digital > modulation (e.g. pulse code modulation, pulse width modulation, pulse > density modulation, etc.) and related processing (e.g. delta-sigma > converters) using Mathematica. > > I know of the built-in signal processing functions and a bit about some > of the digital signal processing packages, but I've not found any that > cover these specific areas. > > Thank you for any suggestions. > > -- Bob > > -- > Robert L. Knighten > R... at knighten.org Here are some resources of interest: 1. Once upon a time, WRI sold a 'Signals and Systems' package... Nasser Abbasi has a copy of the documentation available on his webpage at: http://12000.org/my_notes/faq/mma_notes/Mathematica_for_signal_processing.htm (Note: not compatible with v7 or v8... a major bummer...) I wish WRI would set up an open source project with this legacy code so the community could reincorporate some of these features into Mathematica in an integrated way. It seems that add-on package features are continually condensed and incorporated into the main distribution. While I understand and agree with WRI's decision from a design perspective, I find it incredibly frustrating to know there is all this useful, yet abandoned code out there. Users are effectively forced to reinvent the wheel. The 'Fuzzy Logic' package is another package I'm interested in---it seems destined to die without *any* of its features being incorporated into the main distribution of Mathematica. >From a package design perspective, it would also be *very* helpful just to see how WRI tied all of these features together. Software design guidelines for large packages are few and far between. 2. Prof. Mariusz Jankowski has produced a large amount of signal processing course materials, supported by a government grant and with help from WRI. Here are some links... He also wrote the original Image Processing package. http://eelinux.ee.usm.maine.edu/courses//ele314/ http://eelinux.ee.usm.maine.edu/courses//ele483/ http://eelinux.ee.usm.maine.edu/courses//ele486/ http://eelinux.ee.usm.maine.edu/courses//ele489/ There is overlap in a lot of these materials. Generally speaking, ele314 is on signal analysis, processing and convolution; ele483 contains info on digital modulation and sampling; ele486 contains info on filters and filter design; ele489 contains info specific to image processing. You will probably want to start by looking at ele483 materials, specifically the notebooks: http://eelinux.ee.usm.maine.edu/courses//ele483/DPCM.nb http://eelinux.ee.usm.maine.edu/courses//ele483/DeltaModulation.nb http://eelinux.ee.usm.maine.edu/courses//ele483/Quantization.nb http://eelinux.ee.usm.maine.edu/courses//ele483/PulseShaping.nb Hope that helps. :) -RG