GB1516040A - Digital data transmission system - Google Patents

Digital data transmission system

Info

Publication number
GB1516040A
GB1516040A GB47058/76A GB4705876A GB1516040A GB 1516040 A GB1516040 A GB 1516040A GB 47058/76 A GB47058/76 A GB 47058/76A GB 4705876 A GB4705876 A GB 4705876A GB 1516040 A GB1516040 A GB 1516040A
Authority
GB
United Kingdom
Prior art keywords
square
memory
points
received
phase
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB47058/76A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1516040A publication Critical patent/GB1516040A/en
Expired legal-status Critical Current

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
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • H04L2027/003—Correction of carrier offset at baseband only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0053—Closed loops
    • H04L2027/0057—Closed loops quadrature phase
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0063—Elements of loops
    • H04L2027/0067—Phase error detectors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
GB47058/76A 1975-12-09 1976-11-11 Digital data transmission system Expired GB1516040A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7538562A FR2335109A1 (fr) 1975-12-09 1975-12-09 Procede et dispositif de detection statistique de donnees

Publications (1)

Publication Number Publication Date
GB1516040A true GB1516040A (en) 1978-06-28

Family

ID=9163814

Family Applications (1)

Application Number Title Priority Date Filing Date
GB47058/76A Expired GB1516040A (en) 1975-12-09 1976-11-11 Digital data transmission system

Country Status (8)

Country Link
US (1) US4047153A (enExample)
JP (1) JPS5271916A (enExample)
AU (1) AU508347B2 (enExample)
CA (1) CA1087736A (enExample)
DE (1) DE2643247C2 (enExample)
FR (1) FR2335109A1 (enExample)
GB (1) GB1516040A (enExample)
IT (1) IT1074007B (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0031193A1 (en) * 1979-08-31 1981-07-01 Paradyne Corporation Double sideband quadrature carrier modulation system and method of transmitting information using the point constellation of such a system

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2619392C3 (de) * 1976-04-30 1978-11-02 Siemens Ag, 1000 Berlin Und 8000 Muenchen Entzerrer zur adaptiven Basisband-Entzerrung eines phasenmodulierten Signals
FR2428946A1 (fr) * 1978-06-13 1980-01-11 Ibm France Procede et dispositif pour initialiser un egaliseur adaptatif a partir d'un signal de donnees inconnu dans un systeme de transmission utilisant la modulation d'amplitude en quadrature
US4247944A (en) * 1978-11-15 1981-01-27 Ricoh Co., Ltd. V.29 Constellation detection method and apparatus
US4283682A (en) * 1979-04-06 1981-08-11 Ricoh Company, Ltd. Erasure zone decision feedback phase lock loop for carrier recovery in data modems
US4328552A (en) * 1980-01-17 1982-05-04 Stovall Robert E Statistical calibration system
US4404542A (en) * 1980-12-05 1983-09-13 Rca Corporation Digital sequence detector
JPS57162858A (en) * 1981-03-31 1982-10-06 Fujitsu Ltd Discrimination system for reference point
US4596024A (en) * 1983-05-23 1986-06-17 At&T Bell Laboratories Data detector using probabalistic information in received signals
US4679227A (en) * 1985-05-20 1987-07-07 Telebit Corporation Ensemble modem structure for imperfect transmission media
DE10347259B4 (de) * 2003-10-08 2013-10-31 Entropic Communications, Inc. Verfahren zum Synchronisieren einer Schaltungsanordnung beim Empfang eines modulierten Signals
US7917798B2 (en) * 2005-10-04 2011-03-29 Hypres, Inc. Superconducting digital phase rotator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4875380A (enExample) * 1971-12-27 1973-10-11

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0031193A1 (en) * 1979-08-31 1981-07-01 Paradyne Corporation Double sideband quadrature carrier modulation system and method of transmitting information using the point constellation of such a system

Also Published As

Publication number Publication date
US4047153A (en) 1977-09-06
FR2335109B1 (enExample) 1978-05-12
FR2335109A1 (fr) 1977-07-08
IT1074007B (it) 1985-04-17
JPS5514592B2 (enExample) 1980-04-17
JPS5271916A (en) 1977-06-15
AU508347B2 (en) 1980-03-20
DE2643247A1 (de) 1977-06-16
DE2643247C2 (de) 1983-03-24
AU2297277A (en) 1978-09-14
CA1087736A (en) 1980-10-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee