Differential phase shift keyed detector utilizing a circulating memory
US3990015A · kind A · utility
3Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1975 |
| Grant date | Nov 2, 1976 |
| Priority date | — |
| Expiry date | Jul 24, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2331
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In the present invention a received DPSK signal is sampled at times corresponding to a peak signal to noise ratio and the sample of signal is passed to a circulating memory. A phase detector is connected to receive the DPSK signal and the sample of signal circulating in the memory to provide an output signal indicative of the phase relationships between the received DPSK signal and the circulating sample signal. A sampling means samples the output signal from the phase detector at the correct bit time, to provide a signal which is a function of the differential phase between adjacent bits of the received DPSK signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.