File:Spectral effects of decimation compared on 3 popular frequency scale conventions.pdf
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DescriptionSpectral effects of decimation compared on 3 popular frequency scale conventions.pdf |
English: Each of 3 pairs of graphs depicts 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). The top pair of graphs represent the discrete-time Fourier transform (DTFT) representation. The middle pair, depict a normalized frequency scale, preferred by many filter design programs. The frequency, f, in Hz is divided by the sample-rate. The periodicity and Nyquist frequency are then represented by constants, 1 and 1/2 respectively. The bottom pair depict a different normalized frequency scale, used by the Z-transform... the periodicity and Nyquist frequency are respectively represented by 2π and π. |
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Date | ||||
Source | Own work. The first two graphs correspond to the top and bottom graphs of Harris[1], Figure 2.10 | |||
Author | Bob K | |||
Permission (Reusing this file) |
I, the copyright holder of this work, hereby publish it under the following license:
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Other versions | Derivative works of this file: Spectral effects of decimation.pdf | |||
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:34, 19 January 2014 | 1,800 × 1,500 (26 KB) | Bob K (talk | contribs) | rescale 4th graph | |
15:52, 19 January 2014 | No thumbnail | 0 × 0 (26 KB) | Bob K (talk | contribs) | User created page with UploadWizard |
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