Patent ID: 8406323

Claim:
A method for modulating a set of data symbols into a combined modulated symbol, the method comprising: (a) dividing the set of data symbols into M groups of data symbols, M>1; (b) transforming each group of data symbols into a time-domain subsymbol to produce M time-domain subsymbols, wherein: the transformation of each group of data symbols is based on a set of subcarriers, of which only a subset of the set of subcarriers is modulated by the group of data symbols; each data symbol in each group modulates a different subcarrier in a corresponding subset of the set of subcarriers; no two subsets of the set of subcarriers have a subcarrier in common; and each transformation transforms the set of subcarriers; and (c) combining the M time-domain subsymbols to form the combined modulated symbol, wherein at least one step of the method is performed by at least on apparaus.