Claims
- 1. A carrier wave reproducer device for use in the reception of a multi-phase digital phase-modulated wave, comprising delayed detector means for carrying out the delayed detection of said multi-phase digital phase-modulated wave at the input of said device, cumulative adder means connected to the output of said delayed detector means for generating a demodulated signal in response to an output signal from said delayed detector means, delay means for delaying said input phase-modulated wave so that the demodulated output signal from said cumulative adder means and the modulation signal on said input phase-modulated wave are brought into phase coincidence, and phase modulator means for inversely modulating said delayed phase-modulated wave with the output signal from said adder means to reproduce a carrier wave.
- 2. A carrier wave reproducer device for use in the reception of a multi-phase digital phase-modulated wave as claimed in claim 1 wherein said delayed detector means comprises signal branching means having two outputs for providing two branched signals in phase with each other, second delay means connected to one of the outputs of said signal branching means for delaying the signal at said one output for a predetermined period of time, and multiplier means connected to the other of the outputs of said signal branching means and to the output of said second delay means for comparing the delayed and undelayed outputs of said signal branching means to generate a detector output signal.
- 3. A carrier wave reproducer device for use in the reception of a multi-phase digital phase-modulated wave as claimed in claim 1 wherein said cumulative adder means comprises threshold means connected to receive the output of said delayed detector means for generating a reproduced code output, logic means connected to receive as one input the output of said threshold means for generating an adder output, and third delay means connected to receive said adder output and for providing a delayed input to said logic means.
- 4. A carrier wave reproducer device for use in the reception of a multi-phase digital phase-modulated wave as claimed in claim 1, in which said device further comprises phase demodulator means connected to the output of said delay means for demodulating said delayed phase-modulated wave by means of the reproduced carrier wave derived from the output of said phase modulator means, switching means connected to the outputs of said phase demodulator means and said cumulative adder means for alternately applying the demodulated output signal from said phase demodulator means and the demodulated output signal from said cumulative adder means to said phase modulator means for use as an inverse modulation signal, and control means response to said input phase-modulated wave and the output of said phase modulator means for controlling said switching circuit in such manner that at the beginning of reception of said phase-modulated wave in a burst form said phase-modulated wave is inversely modulated with the demodulated output signal from said adder means to reproduce the carrier wave, but after the reproduction of said carrier wave has been established said phase-modulated wave is inversely modulated with the demodulated output signal from said phase demodulator to reproduce said carrier wave.
- 5. A carrier wave reproducer device for use in the reception of a multi-phase digital phase-modulated wave as claimed in claim 4 wherein said control means comprises first detector means for detecting said multi-phase digital phase-modulated wave at the input of said device to generated a first switching control signal to said switching means, and second detector means connected to the output of said phase modulator means for detecting said reproduced carrier wave to generate a second switching control signal to said switching means.
- 6. A carrier wave reproducer device for use in the reception of a multi-phase digital phase-modulated wave, comprising clock extracting means for extracting a clock signal component from said multi-phase digital phase-modulated wave at the input of said device, word generator means connected to the output of said clock extracting means for generating a dummy demodulated signal in response to an output signal of said clock extracting means, delay means for delaying said input phase-modulated wave so that the dummy demodulated signal from said word generator means the modulation signal on said input phase-modulated wave is brought into phase coincidence, phase modulator means connected to the output of said delay means for inversely modulating said delayed phase-modulated wave with the output signal from said word generator means to reproduce a carrier wave, phase demodulator means connected to the output of said delay means for demodulating said delayed phase-modulated wave by means of the reproduced carrier wave derived from the output of said phase modulator means, switching means connected to the outputs of said phase demodulator means and said word generator means for alternately applying the demodulated output signal from said phase demodulator means and the dummy demodulated output signal from said word generator means to said phase modulator means for use as an inverse modulation signal, and control means response to said input phase-modulated wave and the output of said phase modulator means for controlling said switching means in such manner that at the beginning of reception of said phase-modulated wave in a burst form said phase-modulated wave is inversely modulated with the dummy demodulated output signal from said word generator means to reproduce the carrier wave, but after the reproduction of said carrier wave has been established said phase-modulated wave is inversely modulated with the demodulated output signal from said phase demodulator means to reproduce said carrier wave.
Priority Claims (3)
Number |
Date |
Country |
Kind |
48-45269 |
Apr 1973 |
JA |
|
48-75975 |
Jul 1973 |
JA |
|
48-75976 |
Jul 1973 |
JA |
|
CROSS-REFERENCE TO RELATED APPLICATION
The benefit of 35 U.S.C. 120 is claimed for all subject matter commonly disclosed in this and copending application Ser. No. 462,839, filed Apr. 22, 1974, now abandoned.
US Referenced Citations (4)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
462639 |
Apr 1974 |
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