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This discussion happens all the time on comp.dsp, between primarily
computer-science folks approaching DSP and EE types approaching it. EE folks' definition of "linear" implicitly includes time invariance; DSP people have to see it stated explicitly (as "LTI": Linear Time Invariant) lest they think "linear" just means having no second-or-higher-order terms. It is not a deficiency on either party's part, just a difference of definition in each's respective discipline (is that enough alliteration?). Therefore, I advise each to bend this much: Use the full phrase "Linear Time-Invariant" when this miscommunication is suspected, so both know what the hell the other is talking about. Now go and sin no more. -- Weav NW6E and other vices |
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