Energy-Efficient Fast Fourier Transforms for Cognitive Radio Systems
Roberto Airoldi, Omer Anjum, Fabio Garzia, Alexander M. Wyglinski, Jari Nurmi · IEEE Micro · 2010
An energy-efficient fast Fourier transform (FFT) algorithm for cognitive radio communication systems uses a homogeneous multiprocessor system on chip. The algorithm allows for pruning of inputs such that algorithm complexity can be reduced whenever several of the FFT inputs are zero. Results show that the pruning algorithm significantly reduces energy consumption compared to a nonpruned version.