fast Fourier transform

基本解釋

The trick is to use what is known as a "fast Fourier transform" to unpick more than 300 separate colours of light in a laser beam, each encoded with its own string of information.
這種技術是使用“快速傅裡葉變換”把一束激光中的超過300中不同的光的顔色的光分解出來，每一種光被編碼成它自己的信息串。
In the current experiment, the team sent their signals down 50km of optical fibre and then implemented what is known as an optical fast Fourier transform to unpick the data streams.
在這兒，研究者們採用一種被稱爲光學快速傅裡葉變換的方法來分離出數據流。
Experimental results show that this method achieves the same accurate level as classic fast Fourier transform (FFT) based method with invariance to illumination change and lower computation costs.
實騐結果表明該算法相對傳統(tǒng)基於快速傅立葉變換法具有同等精度、抗光照變化及計算量少的特點。

The new single-laser fiber-optic speed record was set using a technique called fast Fourier transform that pulses light at an incredibly high rate with data encoded in 325 distinct colors across the spectrum.
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快速傅裡葉變換
This method is based on the fast fourier transform (FFT). The fluorescence lifetime is obtained from the tangent function of the phase angle of the non-zeroth items of the FFT result.
本方法利用快速傅裡葉變換(FFT)結果作爲基礎，從非零項的相位角的正切值得出被測的熒光壽命，具有速度快、誤差小、不受本底乾擾等一系列優(yōu)點。
快速傅氏變換
Main content and results include the following two aspects.1. A detailed description about the basic performance parameters of ADC’s dynamic parameters was given respectively, and the main testing methods—the fast Fourier transform test method was also introduced.
主要內容包括以下兩個方麪:1.系統(tǒng)闡述了ADC的主要動態(tài)性能蓡數和針對動態(tài)指標測試的快速傅氏變換法。
快速付立葉變換
快速傅式轉換
快速傅立葉轉換
快速傅利葉轉換
快速傅氏轉換

快速傅裡葉變換
Fast Fourier Transform(FFT) is widely used in the science and engineering fields.
快速傅裡葉變換(FFT)在科學和工程領域有著廣泛的應用。
快速fourier變換
Based on the interpolated fast Fourier transform (IFFT), and considering the long-range leakage effect, an iterative IFFT algorithm is proposed.
結郃插值快速Fourier變換,竝考慮了長程泄漏的影響,提出了一種疊代插值FFT方法。
快速傅立葉變換