Towards a triple mode common operator FFT for Software Radio systems

Abstract : A scenario to design a Triple Mode FFT is addressed. Based on a Dual Mode FFT structure, we present a methodology to reach a triple mode FFT operator (TMFFT) able to operate over three different fields: complex number domain C, Galois Fields GF(Ft) and GF(2m). We propose a reconfigurable Triple mode Multiplier that constitutes the core of the Butterflybased FFT. A scalable and flexible unit for the polynomial reduction needed in the GF(2m) multiplication is also proposed. An FPGA implementation of the proposed multiplier is given and the measures show a gain of 18%in terms of performance-to-cost ratio compared to a "Velcro" approach where two self-contained operators are implemented separately.
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Ali Al Ghouwayel, Amin Haj-Ali, Zouhair El-Bazzal, Yves Louët. Towards a triple mode common operator FFT for Software Radio systems. ICT 2012, Apr 2012, Beyrouth, Lebanon. 6 p., ⟨10.1109/ICTEL.2012.6221243⟩. ⟨hal-00682888⟩

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