OFDMn
OFDMn is a generalized notion used in some academic discussions to denote a family of multicarrier modulation schemes that extend orthogonal frequency-division multiplexing (OFDM) by introducing a parameter n. In this sense, n is a design degree of freedom that can influence the structure of the subcarrier lattice, symbol duration, or the organization of subcarriers within blocks. Because the literature uses different interpretations of n, there is no single standardized definition for OFDMn.
Conceptually, OFDMn shares the core processing chain of OFDM: data symbols are mapped, allocated to subcarriers,
The role of n varies by implementation. It may determine subcarrier spacing, block structure, or the dimensioning
Applications of OFDMn have appeared primarily in research contexts, where the framework is used to explore