9.3 decimation-in-time FFT Algorithms | slideum.com

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信号处理原理 FFT实验张哲沈阳广播电视大学 FFT算法计算DFT需要： N*N=N2次复数乘法 N*N=N2次复数加法直接计算DFT的复杂度为O(N2) FFT不是一种新的算法，而只是DFT的快速算法 k N W 被称为旋转因子，可以预先算好并保存离散谱的性质离散谱定义离散序列h(nTs) (0n   k  ( k  Z ) Hk  H   NT  S   离散谱性质周期性序列的N点DFT离散谱是周期为N的序列。如果离散序列x(nTs)(0n 关于原点和N/2都有 ☆共轭对称性 * H k  H k * H.

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Introduction to Digital Signal Processing

Discrete Fourier Transform (DFT)

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Chapter 8 The Discrete Fourier Transform

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The CAPM - Northwestern University

9.3 decimation-in-time FFT Algorithms

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