From OpenCL to Gates: the FFT

Joao Andrade, Vitor Silva, Gabriel Falcao
Instituto de Telecomunicacoes, Dept. of Electrical and Computer Engineering, University of Coimbra, 3030-290 Coimbra, Portugal
IEEE Global Conference on Signal and Information Processing (GlobalSIP), 2013


   title={From OpenCL to Gates: the FFT},

   author={Andrade, Joao and Silva, Vitor and Falcao, Gabriel},



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The FFT plays a fundamental role in OFDM programmable digital baseband communication systems under the SDR context. The core nature of this algorithm marks it as a primary target for acceleration. Since long frame lengths of the FFT are desirable in order to achieve higher bitrates, the computational complexity becomes even more significant. In this paper we propose OpenCL FFT kernels for FPGAs and assess their performance with those obtained using GPUs at higher energy efficiency in the FPGA case.
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