A new ROMless twiddle factor generator for radix-2 1024-point FFT
Li Jin Cheng, Yang Hua Zhong · 2003
A low power 16-bit ROMless twiddle factor generator for radix-2 1024-point FFT is designed. This twiddle factor generator consists of several simple logic units and each of them is used to regenerate one group of the twiddle factors that is summed together by a bus. The power analysis with Synopsys power compiler shows that the power consumed by this twiddle factor generator is less than the power cost by a 128-word ROM, the smallest ROM needed by the twiddle factor generator for a radix-2 1024-point FFT. This twiddle factor generator is much suitable for the applications of mobile communications and other portable devices.