A method and apparatus for communicating information by: dividing the information into at least a first information portion and a second information portion; modulating a plurality of domain resources to encode the first information using an index or grammar; and encoding the second information by modulation of domain resources. Optionally, the plurality of domain resources may be modulated to encode the first information by allocating at least two different modulation types to a plurality of sub-carriers. The modulation type is allocated to domain resources according to the index or grammar, which applies meaning to which modulation type is allocated to which domain resource. The modulation may include encoding part of the first information portion using one or more domain resources of a first domain and another part of the first information portion using one or more domain resources of a second domain.