Patent ID: 6912194

Claim:
In a communication system, a method of generating a digital output data stream for subsequent digital-to-analog conversion to carrier signals having a plurality of frequency bins, the method comprising: receiving the digital input data stream; generating digital subsymbols in response to the data stream; generating digital data points representing the subsymbols without entering the time domain in response to the subsymbols; and accumulating the digital data points associated with one or more of the frequency bins, wherein the carrier signals comprise at least a first carrier signal having a first frequency and carrying a first subsymbol and a second carrier signal having a second frequency and carrying a second subsymbol, wherein the input data stream comprises input digital first data and input digital second data, and wherein the generating digital subsymbols comprises generating a digital form of the first carrier signal carrying the first subsymbol in response to the first data and generating a digital form of the second carrier signal carrying the second subsymbol in response to the second data.