Machine learningSpectral analysis
傅里叶变换与谱分析 (FFT)
傅里叶变换将时域信号分解为其组成的弦波频率,揭示了隐藏在复杂波形中的频谱内容。约瑟夫·傅里叶于1822年引入了连续变换,但计算效率极高的快速傅里叶变换 (FFT) 由詹姆斯·库利和约翰·图基于1965年正式提出。他们开创性的算法将计算复杂度从 O(N²) 降低到 O(N log N),使得大规模谱分析在工程、物理和数据科学领域成为可能。
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来源
- Cooley, J. W., & Tukey, J. W. (1965). An algorithm for the machine calculation of complex Fourier series. Mathematics of Computation, 19(90), 297–301. DOI: 10.1090/S0025-5718-1965-0178586-1 ↗
如何引用本页
ScholarGate. (2026, June 2). Fourier Transform and Spectral Analysis (FFT). ScholarGate. https://scholargate.app/zh/signal-processing/fourier-transform
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