Asynchronous quadriphase communications system and method
US3931472A · kind A · utility
10Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 1974 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | May 7, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S370/914
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A communications system and method for transmitting and receiving two independently timed (asynchronous) binary data signals on a quadriphase carrier. The four phase ambiguity ordinarily resulting from quadriphase transmission and reception is overcome by uniquely identifying one input channel, for example, by slightly increasing the clock rate of the channel. In reception each channel is demodulated and the data rate of each channel is examined to identify the increased clock rate channel. That channel is then returned to its original clock rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.