초록 ▼

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 prefer

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.

대표청구항 ▼

[ What is claimed and desired to be secured by United States Letters Patent is:] [1.]1. In a system where data is sent from a sending system to a receiving system over a band limited channel using a transmission waveform comprising a plurality of individual narrowband waveforms, each comprised of a

[ What is claimed and desired to be secured by United States Letters Patent is:] [1.]1. In a system where data is sent from a sending system to a receiving system over a band limited channel using a transmission waveform comprising a plurality of individual narrowband waveforms, each comprised of a plurality of substantially phase continuous events with a width based on the data word encoded thereby, a method for high speed data transfer between the sending system and the receiving system, comprising the steps of:generating a plurality of substantially phase continuous narrowband waveforms, each comprising a plurality of substantially phase continuous events with a width that is dependent on a data word to be transferred by that event and that lies between a minimum and maximum value selected for each of the plurality of narrowband waveforms so that each of said narrowband waveforms occupies a relatively small portion of the bandwidth of the band limited channel;generating at least one substantially phase continuous pilot tone;defining an epoch time;combining said plurality of narrowband waveforms and said at least one pilot tone into a transmit waveform having the epoch time;transmitting said transmit waveform to the receiving system, wherein a single frame of data is transferred during said epoch time after which a new epoch is begun that transfers an additional frame of data; andwhile transmitting said transmit waveform, inserting a makeup time for any of said plurality of narrowband waveforms which fall short of said epoch time after all data words for the current frame of data have been transferred.