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English: These graphs depict the spectral distributions of an oversampled function and the same function sampled at 1/3 the original rate. The bandwidth, B, in this example is just small enough that the slower sampling does not cause overlap (aliasing). Sometimes, a sampled function is resampled at a lower rate by keeping only every Mth sample and discarding the others, commonly called "decimation". Potential aliasing is prevented by lowpass-filtering the samples before decimation. The maximum filter bandwidth is tabulated in the bandwidth units used by the common filter design applications.
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Source Own work. These graphs correspond to the top and bottom graphs of Harris[1], Figure 2.10
Author Bob K
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  1. ↑ Harris, Frederic J. (24 May 2004) "2.2" in Multirate Signal Processing for Communication Systems, Upper Saddle River, NJ: Prentice Hall PTR, p. 22 ISBN: 0131465112.

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Date/TimeThumbnailDimensionsUserComment
current15:55, 8 January 2020Thumbnail for version as of 15:55, 8 January 20201,687 × 1,125 (86 KB)Bob Kchange B to 0.5/MT
00:34, 8 January 2020Thumbnail for version as of 00:34, 8 January 20201,687 × 1,125 (86 KB)Bob Kre-label axis of 2nd graph
02:40, 3 January 2020Thumbnail for version as of 02:40, 3 January 20201,687 × 1,125 (64 KB)Bob Kminor improvements
15:43, 1 January 2020Thumbnail for version as of 15:43, 1 January 20201,687 × 1,237 (63 KB)Bob KGo back to unnormalized frequency scale. Add table of 3 common normalizations.
20:13, 31 December 2019Thumbnail for version as of 20:13, 31 December 20191,800 × 900 (51 KB)Bob KUser created page with UploadWizard
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