FPGA implementation of a reconfigurable FFT for software radio multistandard systems

Ali Al Ghouwayel (1) , Yves Louët (2)

1 Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (UMR 3192)
2 IETR - Institut d'Électronique et des Technologies du numéRique

This study is focused on the Field Programmable Gate Array (FPGA) implementation of a re-configurable Fast Fourier Transform (FFT) operator able to provide Fourier transforms both over complex infinite field C and Galois finite Field GF. This new re-configurable FFT exploits to a great advantage the possibility to share hardware resources when considering multi-standard scenarios for software radio systems. A re-configurable FFT of length N=256 has been implemented on FPGA. It achieves a performance-to-cost ratio gain from 24% to 9.4% compared to the basic duplicated solution for which no re-configuration is considered. The proposed technology is strongly connected to further consumer handheld devices such as mobile phones intended to support several standards (digital television, mobile communications, wireless local area network etc) where FFT is involved

Keywords: Software Radio; Reconfigurable; FFT; Dual Mode; Galois Field

Domains: Signal and Image processing; Signal and Image Processing

Ali Al Ghouwayel, Yves Louët. FPGA implementation of a reconfigurable FFT for software radio multistandard systems. IEEE Transactions on Consumer Electronics, 2009, Vol. 55 (N°2), pp. 950-958. ⟨hal-00418680⟩