Patent ID: 7688904
Filing Date: 2010-03-30
Classification: H04L

Abstract:
1. A method for operating a transmitter that transmits signals between communication nodes, the method comprising: generating a first waveform that includes a shaped portion; generating a second waveform that includes a shaped portion; combining the first and second waveforms including overlapping the shaped portion of the first waveform with the shaped portion of the second waveform and adding the overlapped portions of the waveforms; and generating a signal including the combined first and second waveforms; wherein at least one of the first and second waveforms includes a characteristic signature configured for synchronizing with the signal, wherein the characteristic signature comprises a transition between adjacent symbols of the first waveform, and wherein each of the first and second waveforms comprises a plurality of symbols, and each symbol comprises a plurality of carrier waveforms, and wherein each symbol of the first waveform occurring before the transition has a first set of phases for respective carrier waveforms, each symbol of the first waveform occurring after the transition has a second set of phases for respective carrier waveforms, and each of the second set of phases corresponds to a phase in the first set for a corresponding carrier waveform shifted by a constant phase.