Abstract: A wireless data communications method and transmitter are disclosed. A transmitter (402N, 800) includes a module (802) configured to group adjacent sub-bands from among a set of transmission radio frequency channels assigned to a terminal into a plurality of aggregated sub-bands. A single carrier modulator (804) is configured to modulate data symbols in at least some of said aggregated sub-bands. A combining module (808) is configured to combine said single carrier modulated signals into a multi-carrier signal. A receiver (502N, 900) is also provided in conjunction with the transmitter (800) to constitute a transceiver.