| 摘要 |
Systems and methods for high speed data transfer that are capable of transferring a vast amount of data in very little bandwidth using current technology are disclosed. The systems employ a plurality of substantially phase continuous waveforms comprised of a plurality of events. Each event is preferably formed by either a positive or negative half period sinusoidal signal with a duration that varies between some minimum and maximum value to encode a data word on each event of the waveform. The event width variations are typically small to maintain a small frequency variation for each individual waveform. In order to allow a receiver to detect the very small time differential between different event widths, a pilot tone is also placed in the waveform. In a receiver, this pilot tone is recovered and used to phase lock the receiver clock, which typically operates at much much greater frequency than the pilot tone. This phase locked receiver clock can then be used to time the zero crossings of each event in order to extract the data word encoded into each event of the phase continuous waveforms. The individual substantially phase continuous waveforms are extracted from the receive signals via a bank of narrowband filters. By using narrowband filters to extract each phase continuous waveform, the amount of noise competing with the waveform can be reduced.
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