Paul Fortier is a pioneer in the study of orthogonal frequency division multiplexing (OFDM) multicarrier systems and the first to characterize ultra-wideband channels in an underground mine. In addition, his work with Technologies Lyre (now Nutaq) on communication and signal processing systems helped the latter develop its SignalMaster product line now sold around the world. Finally, he has made an outstanding contribution to the teaching of engineering in the province of Quebec, developing several electrical and computer engineering training programs, and over 60 M.Sc and Ph.D. electrical engineering students in the field of telecommunications.