Article View: comp.dsp
Article #2420Sine Waves & Harmonic Dist-Help
From: Michael S. Schechter - ISR group...
Date: Tue, 09 Jan 1990 17:29
Date: Tue, 09 Jan 1990 17:29
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Thanks to those of you who responded about my question concerning interpolation of sines. After thinking on the problem further, I realized that one of those things from way way back in school may be useful and looked at the Taylor series. It looks like by using it to directly generate values, I can generate a 5-term x,x3,x5,x7,x9 series faster than I could interpolate, and in any case, easily fast enough to get 16 samples/cycle at 20kHz. (one of the specs). This 5-term series has a worst-case error of 4e-6 from "correct" values over the range 0->pi/2. **** New Question **** Does this error (4e-6) indicate a signal-to-harmonic ratio of about 103 dB ?? (I'm trying to get >100 dB) or, is the relationship very complicated? Thanks, Mike. isr@rodan.acs.syr.edu
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arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uwm.edu!rpi!nisc.nyser.net!rodan!rodan.acs.syr.edu!isrShow Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uwm.edu!rpi!nisc.nyser.net!rodan!rodan.acs.syr.edu!isr From: isr@rodan.acs.syr.edu (Michael S. Schechter - ISR group account) Newsgroups: comp.dsp Subject: Sine Waves & Harmonic Dist-Help Message-ID: <1701@rodan.acs.syr.edu> Date: 9 Jan 90 17:29:17 GMT Sender: isr@rodan.acs.syr.edu Reply-To: isr@rodan.acs.syr.edu (Michael S. Schechter - ISR group account) Organization: Institute for Sensory Research Lines: 16