C. Sidney Burrus

Charles Sidney Burrus (October 9, 1934 in Abilene, Texas - April 3, 2021) was an American electrical engineer and the Maxfield and Oshman Professor Emeritus of Electrical and Computer Engineering at Rice University in Houston, Texas. He is widely known for his contributions to digital signal processing, especially FFT algorithms, IIR filter design, and wavelets. Provided by Wikipedia