shiner-chen / fft

fft and cross-correlation

USE GUIDE:

This project use C language to relize FFT algorithm, and then calculate cross-correlation by FFT. Use FFT to calculate cross-correlation will improve the performance from O(N^2) to O(n*log(n))

Fllow steps to use this projects:

1. make
2. make run
3. open matlab and run plot_result.m

UPDATES

1. Add and test function @fft_real and @ifft_real for Real Input Signal, In 2014.04.15
2. Replace @cos and @sin from <math.h> bu using 2 tables, In 2014.04.15

AUTHOR:

[e-mail]

2014-04-09