US Patent 7688904 Generating signals for transmission of information

A method and system for transmitting signals between communication nodes is presented. The method includes generating a first waveform that includes a shaped portion; generating a second waveform that includes a shaped portion; and 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. The method includes generating a signal including the combined first and second waveforms. At least one of the first and second waveforms includes a characteristic signature configured for synchronizing with the signal.