Practical Implementation of a FFT-Pruning Algorithm for NC-OFDM Systems
Project Award Date: 08-01-2006
Known in the literature as "FFT pruning", these algorithms reduce the number of multiplications and additions in an FFT block when there exists a substantial number of zero-valued inputs. In the cognitive radio networks community, one scenario where these algorithms could make a significant
contribution is in a non-contiguous orthogonal frequency division multiplexing (NC-OFDM) transceiver, a spectrally agile version of OFDM designed to allow unlicensed users access to licensed spectrum without interfering with the incumbent's rights. As with conventional OFDM, NC-OFDM employs an FFT at its core.