この動画では、史上最も重要なアルゴリズムの1つとされる高速フーリエ変換、FFTがどのように生まれたのかを追います。もともとは地下核実験を地震波から見抜くために必要とされた数学で、通常なら100万サンプルの解析に1兆回もの計算が必要でした。しかしFFT ...

It’s not often one algorithm shapes the entire arc of modern technology, but the Fast Fourier Transform (FFT) has done exactly that. Created by researchers at Princeton University and IBM in the early ...

This audio spectrum analyzer utilizes an ARM7 LPC2138 microcontroller to create an FFT algorithm while performing digital signal processing without the use of special DSP processor. This audio ...

Vlodymyr teaches at Brandenburg University of Technology, Cottbus, Germany. He can be reached at myrnyy@math.tu-cottbus.de. This article provided courtesy ofDr. Dobb’s Journal. This article describes ...

The Fourier transform is one of the most fundamental concepts in the information sciences. It’s a method for representing an irregular signal — such as the voltage fluctuations in the wire that ...

「同じ精度が出るなら、31倍速い方がいいに決まっている」 そんな当たり前の、しかし極めて困難だった課題に対し、Ghost Drift研究所は一つの回答を提示しました。 O(N²)の全和計算をO(N log N)に置き換える方法 ―― 監査可能なFFTアルゴリズムによる31倍速化 ...

In this paper, a Fast Fourier Transform (FFT) or inverse FFT processor for Fifth-Generation (5G) Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) system’s ...

AMES, Iowa – Something called the fast Fourier transform is running on your cell phone right now. The FFT, as it is known, is a signal-processing algorithm that you use more than you realize. It is, ...