GB1380141A - Phase-amplitude multiple digital modulation system - Google Patents

Phase-amplitude multiple digital modulation system

Info

Publication number
GB1380141A
GB1380141A GB596572A GB596572A GB1380141A GB 1380141 A GB1380141 A GB 1380141A GB 596572 A GB596572 A GB 596572A GB 596572 A GB596572 A GB 596572A GB 1380141 A GB1380141 A GB 1380141A
Authority
GB
United Kingdom
Prior art keywords
phase
amplitude
hexagons
combinations
modulation system
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
GB596572A
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.)
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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 Kokusai Denshin Denwa KK filed Critical Kokusai Denshin Denwa KK
Publication of GB1380141A publication Critical patent/GB1380141A/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
    • H04L27/32—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
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
GB596572A 1971-02-10 1972-02-09 Phase-amplitude multiple digital modulation system Expired GB1380141A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46005282A JPS5125303B1 (enExample) 1971-02-10 1971-02-10

Publications (1)

Publication Number Publication Date
GB1380141A true GB1380141A (en) 1975-01-08

Family

ID=11606869

Family Applications (1)

Application Number Title Priority Date Filing Date
GB596572A Expired GB1380141A (en) 1971-02-10 1972-02-09 Phase-amplitude multiple digital modulation system

Country Status (4)

Country Link
US (1) US3805191A (enExample)
JP (1) JPS5125303B1 (enExample)
DE (1) DE2206382C3 (enExample)
GB (1) GB1380141A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163321A (en) * 1981-12-28 1986-02-19 Lmt Radio Professionelle Interrogation signals

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2270721B1 (enExample) * 1974-04-12 1976-10-08 Europ Teletransmission
DE2544124C3 (de) * 1974-10-04 1982-02-25 CSELT-Centro Studi e Laboratori Telecomunicazioni S.p.A., Torino Rückkopplungsentzerrer
US4037049A (en) * 1974-10-18 1977-07-19 Intertel, Inc. Modulator and demodulator for data communications network
IT1030453B (it) * 1975-03-27 1979-03-30 Cselt Centro Studi Lab Telecom Organo di decisione per ricevitori di segnali numerici a piu livelli modulati in fase o in fase e ampiezza
US4404532A (en) * 1978-09-29 1983-09-13 Communications Satellite Corporation Modulator having improved bandwidth and power requirements
US4538284A (en) * 1981-03-25 1985-08-27 Ese Limited Signal structures with data encoding/decoding for QCM modulations
DE3117134A1 (de) * 1981-04-30 1982-11-18 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Digitale modulationsverfahren
US4580111A (en) * 1981-12-24 1986-04-01 Harris Corporation Amplitude modulation using digitally selected carrier amplifiers
GB2118003B (en) * 1982-02-02 1985-07-31 Racal Milgo Ltd Differential encoder and decoder for transmitting binary data
FR2589298B1 (fr) * 1985-10-28 1987-11-20 Verdot Georges Modulateur par deplacement de phase maq 22n et, en particulier, modulateur mdp4
US4894844A (en) * 1987-06-12 1990-01-16 Codex Corporation Signal constellations
US4959842A (en) * 1988-04-13 1990-09-25 Codex Corporation Signal constellations
DE3934187C1 (enExample) * 1989-10-13 1991-03-14 Ant Nachrichtentechnik Gmbh, 7150 Backnang, De
US5237292A (en) * 1992-07-01 1993-08-17 Space Systems/Loral Quadrature amplitude modulation system with compensation for transmission system characteristics
DE4318547A1 (de) * 1993-06-04 1994-12-08 Rohde & Schwarz Verfahren zur digitalen Modulation mit Sinusträger
US6122323A (en) * 1994-08-02 2000-09-19 International Automated Systems, Inc. Apparatus and method for digital information transfer
US5689529A (en) * 1994-08-02 1997-11-18 International Automated Systems, Inc. Communications method and apparatus for digital information
US5640422A (en) * 1994-08-02 1997-06-17 International Automated Systems, Inc. Digital communications modulation method and apparatus
US6137831A (en) * 1997-06-20 2000-10-24 Johnson; Neldon P. Method and apparatus for reducing receiver imposed distortion
WO1999011040A1 (en) * 1997-08-25 1999-03-04 Nokia Networks Oy Digital modulator for angle and/or amplitude modulation
US6236691B1 (en) 1999-03-16 2001-05-22 International Automated Systems, Inc. Signal demodulation method and apparatus
US6088403A (en) * 1999-03-16 2000-07-11 Johnson; Neldon P. Signal extraction method and apparatus
US7138882B2 (en) * 2002-11-08 2006-11-21 Northrop Grumman Corp Architecture for universal modulator
US7023292B2 (en) * 2003-12-17 2006-04-04 Telefonaktiebolaget L.M. Dericsson Polar modulation using amplitude modulated quadrature signals
WO2006118318A1 (en) * 2005-04-27 2006-11-09 Matsushita Electric Industrial Co., Ltd. Polar modulation transmission circuit and communication device
US9129607B2 (en) * 2011-06-28 2015-09-08 Adobe Systems Incorporated Method and apparatus for combining digital signals
US10318158B2 (en) * 2012-05-17 2019-06-11 Brilliant Points, Inc. System and method for digital signaling and digital storage

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2905812A (en) * 1955-04-18 1959-09-22 Collins Radio Co High information capacity phase-pulse multiplex system
US2924791A (en) * 1957-02-25 1960-02-09 Rca Corp Modulation system for transmitters
NL238653A (enExample) * 1958-04-28
US3497625A (en) * 1965-07-15 1970-02-24 Sylvania Electric Prod Digital modulation and demodulation in a communication system
US3553367A (en) * 1968-05-10 1971-01-05 Litton Systems Inc Facsimile multiplex communication system
JPS5038488B1 (enExample) * 1970-08-14 1975-12-10

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163321A (en) * 1981-12-28 1986-02-19 Lmt Radio Professionelle Interrogation signals

Also Published As

Publication number Publication date
DE2206382A1 (de) 1972-08-24
JPS5125303B1 (enExample) 1976-07-30
US3805191A (en) 1974-04-16
DE2206382B2 (de) 1974-01-10
DE2206382C3 (de) 1974-08-01

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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