... of digital signals and the design of DSP systems.Like the Fourier, Laplace, and z-transforms, the DFT has several important propertiesthat enhance its utility for analyzing finite-length signals. ... bit-reversal order */fft(X,EXP,U,0); /* Perform IFFT */344 FAST FOURIER TRANSFORM AND ITS APPLICATIONS The complex radix-2 FFT program listed in Table 7.3 computes the complex decima-tion-in-time ... the command file exp7.cmd, thefunctions epx7a.c, fft_a.c,andibit_rev.c, and the header fileicomplex.h from the software package into the project.340 FAST FOURIER TRANSFORM AND ITS APPLICATIONS ...