I am trying to improve the speed of an FFT algorithm for processing a sonar
bottom echo return signal. I implemented FFT for N = 8192 nodes. An FFT
algorithm has NLogN performance however we're investigating improving the
performance of the algorithm. There's a paper called Fast Approximate
Fourier Transform via Wavelet Transform which proposes linear performance : https://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.54.3984
Is anyone familiar with this concept? I am trying to understand how it
exactly works and I'm not too familiar with wavelets. Is it running an FFT
algorithm but using Wavelets for computation?