Implemention of 128-Point Fast Fourier Transform Processor for UWB Systems
Sang-In Cho, Kyu‐Min Kang, Sangsung Choi · 2008
In this paper, we present a 4-parallel fast Fourier transform (FFT) processor for a multi-band orthogonal frequency division multiplexing (MB-OFDM) ultra wideband (UWB) system. The proposed FFT processor utilizes radix-24structure so as to significantly enhance the hardware complexity by reducing the numbers of multipliers and adders. The hardware efficient 4-parellel 128-point FFT processor employing the decimation-in-frequency (DIF) and the single-path delay feedback (SDF) algorithms can support throughput rates of up to 1 Gsample/s. The proposed FFT processor is implemented and tested by adopting the 0.18 mum CMOS technology with a supply voltage of 1.8 V.