Application of hybrid CORDIC in split-radix FFT
Li Tianyang · Computer Engineering and Applications Journal · 2010
A CORDIC-based split-radix FFT/IFFT(Fast Fourier Transform/Inverse Fast Fourier Transform) processor is presented to compute 2048/4096/8192-point DFT(Discrete Fourier Transform).The arithmetic unit of butterfly processor and twiddle factor generator are based on CORDIC(Coordinate Rotation Digital Computer) algorithm.The modified CORDIC arithmetic unit is employed for the complex multiplication.A CORDIC twiddle factor generator is proposed and implemented for saving the size of ROM required for storing the twiddle factors.Compared with conventional FFT implementation,the power consumption is reduced by 25%.