Demodulator for phase reversal modulation system
US4084128A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1966 |
| Grant date | Apr 11, 1978 |
| Priority date | — |
| Expiry date | Mar 8, 1986 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2272
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
1. A receiver for use in a PSK signal translation system comprising a voltage tunable local oscillator for continuously generating a reference frequency signal from which the suppressed carrier can be reconstructed, input signal means for an incoming PSK signal, means for adding said reference frequency signal to produce a synthesized carrier which is amplitude modulated by said incoming PSK signal, diode switch means for demodulating synthesized PSK amplitude modulated carrier for causing synchronous phase shifts of the PSK signal components of modulated synthetic carrier in response to the demodulated signals, to thereby provide a continuous unmodulated signal synthesizing the suppressed carrier of the incoming PSK signals; a servo loop, including said oscillator, said signal adding means and said phase shifting means, for locking said oscillator onto said synthesized carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.