Phase-jump detector and corrector method and apparatus for phase-modulated communication systems that also provides a signal quality indication
US4052557A · kind A · utility
5Cited by
5References
28Claims
0Family size
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Key dates
| Filing date | Jul 31, 1975 |
| Grant date | Oct 4, 1977 |
| Priority date | — |
| Expiry date | Jul 31, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/22
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a phase-modulated communication system utilizing voice-band communication channels wherein phase-jumps may be experienced, a phase-jump detector indicates the occurrence of such phase-jumps. A phase-jump corrector responds to the persistence of a phase-jump condition by correcting for it without requiring shut-down and complete reequalization of the transmission channel. Monitoring of the incoming signal for phase-jump occurrence provides a convenient signal quality indication that represents the magnitude of the error in the X and Y components of each received symbol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.