IT1084657B - Dispositivo di demodulazione per onde portanti modulate a sovrapposizione multilivello,multifase - Google Patents

Dispositivo di demodulazione per onde portanti modulate a sovrapposizione multilivello,multifase

Info

Publication number
IT1084657B
IT1084657B IT21454/77A IT2145477A IT1084657B IT 1084657 B IT1084657 B IT 1084657B IT 21454/77 A IT21454/77 A IT 21454/77A IT 2145477 A IT2145477 A IT 2145477A IT 1084657 B IT1084657 B IT 1084657B
Authority
IT
Italy
Prior art keywords
level
phase modulated
demodulation device
supporting waves
waves
Prior art date
Application number
IT21454/77A
Other languages
English (en)
Original Assignee
Nippon Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Electric Co filed Critical Nippon Electric Co
Application granted granted Critical
Publication of IT1084657B publication Critical patent/IT1084657B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2275—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals
    • H04L27/2277—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals using remodulation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
    • H03D3/24—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits
    • H03D3/241—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits the oscillator being part of a phase locked loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals
    • H04L27/2272—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals using phase locked loops
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2275—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
IT21454/77A 1976-03-22 1977-03-21 Dispositivo di demodulazione per onde portanti modulate a sovrapposizione multilivello,multifase IT1084657B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP51031022A JPS5918900B2 (ja) 1976-03-22 1976-03-22 復調装置

Publications (1)

Publication Number Publication Date
IT1084657B true IT1084657B (it) 1985-05-28

Family

ID=12319881

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21454/77A IT1084657B (it) 1976-03-22 1977-03-21 Dispositivo di demodulazione per onde portanti modulate a sovrapposizione multilivello,multifase

Country Status (4)

Country Link
US (1) US4095187A (it)
JP (1) JPS5918900B2 (it)
DE (1) DE2712474C3 (it)
IT (1) IT1084657B (it)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4334312A (en) * 1979-08-10 1982-06-08 Nippon Electric Co., Ltd. Phase synchronizing circuit for use in multi-level, multi-phase, superposition-modulated signal transmission system
US4320345A (en) * 1980-04-28 1982-03-16 Sangamo Weston, Inc. Adaptive differential PSK demodulator
FR2510331A1 (fr) * 1981-07-23 1983-01-28 Leclert Alain Circuit de regeneration d'une onde porteuse
US4449222A (en) * 1981-11-23 1984-05-15 Rockwell International Corporation Digital modulation quality monitor
JPS5939149A (ja) * 1982-08-28 1984-03-03 Nec Corp 多値直交振幅復調器
US4540948A (en) * 1982-09-14 1985-09-10 Nec Corporation 8-Phase phase-shift keying demodulator
DE19732894C2 (de) * 1997-07-30 1999-11-11 Siemens Ag Verfahren und Anordnungen zum schnellen Synchronisieren zweier Trägersignale
DE19732895C2 (de) * 1997-07-30 1999-05-12 Siemens Ag Anordnung zur schnellen digitalen Erzeugung eines digitalen Signals mit vorgebbarer Phasenlage mit Hilfe eines Referenz-Trägersignals
US7221711B2 (en) * 2002-03-27 2007-05-22 Woodworth John R Multilevel data encoding and modulation technique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4039961A (en) * 1974-09-12 1977-08-02 Nippon Telegraph And Telephone Public Corporation Demodulator for combined digital amplitude and phase keyed modulation signals
JPS5267243A (en) * 1975-12-01 1977-06-03 Nippon Telegr & Teleph Corp <Ntt> Amplitude phase modulation signal demodulation unit

Also Published As

Publication number Publication date
JPS5918900B2 (ja) 1984-05-01
DE2712474A1 (de) 1977-10-06
JPS52114254A (en) 1977-09-24
DE2712474C3 (de) 1979-11-29
DE2712474B2 (de) 1979-04-12
US4095187A (en) 1978-06-13

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19950327