Fft ppt

The Fast Fourier Transform Title

Introduction ,[object Object],[object Object],[object Object]

Computational Cost of Discrete-Time Filtering ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Computational Cost of Discrete-Time Filtering ,[object Object],[object Object],[object Object],[object Object]

The Cooley-Tukey decimation-in-time algorithm ,[object Object],[object Object],[object Object]

The Cooley-Tukey decimation-in-time algorithm ,[object Object],[object Object],[object Object],N/2 -point DFT of x[2r] N/2 -point DFT of x[2r+1]

Signal flowgraph representation of 8- point DFT ,[object Object],[object Object]

Continuing with the decomposition … ,[object Object]

The complete decomposition into 2-point DFTs

Closer look at the 2-point DFT ,[object Object],[object Object],[object Object],[object Object]

The complete 8-point decimation-in-time FFT

Number of multiplys for N-point FFTs ,[object Object],[object Object],[object Object]

Fft ppt

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Fft ppt