BR8206516A - Processo e circuito para recuperacao da portadora de um sinal modulado em amplitude e fase por meio de sinais digitais - Google Patents

Processo e circuito para recuperacao da portadora de um sinal modulado em amplitude e fase por meio de sinais digitais

Info

Publication number
BR8206516A
BR8206516A BR8206516A BR8206516A BR8206516A BR 8206516 A BR8206516 A BR 8206516A BR 8206516 A BR8206516 A BR 8206516A BR 8206516 A BR8206516 A BR 8206516A BR 8206516 A BR8206516 A BR 8206516A
Authority
BR
Brazil
Prior art keywords
amplitude
phase
circuit
signal modulated
carrier recovery
Prior art date
Application number
BR8206516A
Other languages
English (en)
Inventor
Giusto Pietro Porzio
Original Assignee
Cselt Centro Studi Lab Telecom
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11309482&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=BR8206516(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Cselt Centro Studi Lab Telecom filed Critical Cselt Centro Studi Lab Telecom
Publication of BR8206516A publication Critical patent/BR8206516A/pt

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
    • H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals
    • H04L27/2273—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals associated with quadrature demodulation, e.g. Costas loop

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
BR8206516A 1981-11-12 1982-11-10 Processo e circuito para recuperacao da portadora de um sinal modulado em amplitude e fase por meio de sinais digitais BR8206516A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT68462/81A IT1145719B (it) 1981-11-12 1981-11-12 Circuito di recupero della partante di un segnale modulato in ampiezza e fase da segnali numerici

Publications (1)

Publication Number Publication Date
BR8206516A true BR8206516A (pt) 1983-09-27

Family

ID=11309482

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8206516A BR8206516A (pt) 1981-11-12 1982-11-10 Processo e circuito para recuperacao da portadora de um sinal modulado em amplitude e fase por meio de sinais digitais

Country Status (8)

Country Link
US (1) US4538111A (pt)
EP (1) EP0079576B1 (pt)
JP (1) JPS5885658A (pt)
AU (1) AU549558B2 (pt)
BR (1) BR8206516A (pt)
CA (1) CA1201774A (pt)
DE (2) DE3271199D1 (pt)
IT (1) IT1145719B (pt)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4583048A (en) * 1985-02-26 1986-04-15 Rca Corporation MSK digital demodulator for burst communications
US4648100A (en) * 1985-03-28 1987-03-03 At&T Bell Laboratories Carrier recovery circuit
JPS6210950A (ja) * 1985-07-08 1987-01-19 Nec Corp デイジタル無線通信方式
DE3619744A1 (de) * 1986-06-12 1987-12-17 Ant Nachrichtentech Verfahren zum gewinnen eines phasendifferenzsignals
US4808937A (en) * 1986-07-15 1989-02-28 Hayes Microcomputer Products, Inc. Phase-locked loop for a modem
US4686689A (en) * 1986-07-24 1987-08-11 Graham-Patten Systems, Inc. Phase-locked loop circuit
DE3766614D1 (de) * 1987-03-10 1991-01-17 Ant Nachrichtentech Verfahren zum gewinnen eines phasendifferenzsignals.
DE3707763C1 (de) * 1987-03-11 1988-06-23 Ant Nachrichtentech Taktphasendetektor
DE3707760C1 (de) * 1987-03-11 1988-06-23 Ant Nachrichtentech Verfahren zur Taktsynchronisation
FR2628916B1 (fr) * 1988-03-15 1990-06-29 Alcatel Thomson Faisceaux Dispositif de synchronisation en modulation de phase a quatre etats decalee
EP0378719B1 (de) * 1989-01-18 1994-04-27 Siemens Aktiengesellschaft Digitaler Verzerrer
US5493581A (en) * 1992-08-14 1996-02-20 Harris Corporation Digital down converter and method
US5425057A (en) * 1994-04-25 1995-06-13 Paff; Thomas M. Phase demodulation method and apparatus using asynchronous sampling pulses
FR2779888B1 (fr) * 1998-06-16 2000-09-08 Sgs Thomson Microelectronics Circuit de detection de verrouillage d'une boucle de synchronisation d'un demodulateur qpsk
US7239431B2 (en) * 2001-04-04 2007-07-03 Agere Systems Inc. System and method for recovering primary channel operation in a facsimile receiver and facsimile machine incorporating the same
US7024599B2 (en) * 2001-12-07 2006-04-04 Applied Micro Circuits Corporation System and method for non-causal channel equalization

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5716546B2 (pt) * 1973-07-12 1982-04-06
FR2368184A1 (fr) * 1976-10-18 1978-05-12 Ibm France Systeme de synchronisation de porteuse pour demodulateur de phase coherent
US4352193A (en) * 1977-09-01 1982-09-28 Honeywell Inc. Intended value determination system
US4404532A (en) * 1978-09-29 1983-09-13 Communications Satellite Corporation Modulator having improved bandwidth and power requirements
US4355402A (en) * 1978-10-19 1982-10-19 Racal-Milgo, Inc. Data modem false equilibrium circuit
JPS55134563A (en) * 1979-04-05 1980-10-20 Nec Corp Offset qpsk phase difference detector

Also Published As

Publication number Publication date
IT8168462A0 (it) 1981-11-12
EP0079576B1 (en) 1986-05-14
EP0079576A2 (en) 1983-05-25
DE3271199D1 (en) 1986-06-19
AU549558B2 (en) 1986-01-30
DE79576T1 (de) 1985-01-31
JPS5885658A (ja) 1983-05-23
AU8874682A (en) 1983-05-19
CA1201774A (en) 1986-03-11
US4538111A (en) 1985-08-27
EP0079576A3 (en) 1984-05-02
IT1145719B (it) 1986-11-05

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