An Effective Design of 128 Point FFT/IFFT Processor UWB Application Utilizing Radix - (16+8) Calculation

In this paper, we present a 128-point FFT/IFFT processor for ultrawideband (UWB) systems. The proposed FFT is developed based on the higher radix -2 4 . It reduces computational complexity and hardware requirement compared to conventional radix -2 FFT. Since the proposed pipelined architecture for 128-point FFT is designed using mixed-radix (16+8) multipath delay feedback (MRMDF). The proposed multi data-path scheme improves the through put rate significantly. In addition to that, the hardware costs of memory and complex multipliers in MRMDF are further reduced by means of the delay feedback and the data scheduling approach. The implementation of mixed radix algorithm is more area efficient than the conventional radix-2 algorithm Keywords— Fast Fourier transform (FFT), Orthogonal frequency division multiplexing (OFDM), Ultrawideband(UWB), Mixed-radix multipath delayfeedback (MRMDF).