In accordance with at least one embodiment, a method, apparatus, and communication system provide intra-symbol multi-dimensional modulation (ISMM). A modulator can be provided modulate data according to ISMM for transmission. The modulator can include a dimensional mapper configured to receive transmit data to provide a plurality of outputs for a plurality of different dimensions; a plurality of dimensional modulators coupled to the dimension mapper, the plurality of dimensional modulators configured to receive the plurality of outputs and to provide a plurality of modulated outputs for the plurality of different dimensions, the plurality of dimensional modulators configured to convey data distributed among a plurality of discrete locations within a symbol; a combiner configured coupled to the plurality of dimensional modulators, the combiner configured to receive the plurality of modulated outputs, to combine the plurality of plurality of modulated outputs, and to provide a transmit signal; and a transmit filter.