Similarities and differences among filtered multitone modulation realizations and orthogonal filter bank design

This paper addresses the efficient realization of a filtered multitone (FMT) modulation system and the orthogonal filter bank (FB) design problem. We describe three possible realizations. Although they appear similar, we aim at highlighting the analogies and differences. We then consider the design of an orthogonal FB and we propose a simplified method that is derived from the exploitation of the structure of the first efficient implementation.