File:FFT visual Rader 11.jpg
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Summary
| Description |
日本語: Raderのアルゴリズムによる高速フーリエ変換の概念図。
色のついた時計と針によりDFT行列が表されている。 11の原始根である2を用いて、列については{2^k (mod 11)}、行については {2^(-k) (mod 11)}の数列により、先頭以外に並び替えを施す。この結果、DFT行列は巡回行列となる。巡回行列を作用させることは巡回畳み込みと同値であり、畳込み定理によりFFTを用いた高速化が可能となる。 |
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| Date | ||||
| Source | Own work | |||
| Author | YoshiGosu | |||
| Other versions |
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Licensing
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 09:36, 14 October 2017 | | 2,900 × 1,633 (858 KB) | Sebastian Wallroth | File:FFT visual Rader 11.pdf cropped using CropTool with precise mode. |
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