CA920239A - Phase and amplitude modulated modem - Google Patents

Phase and amplitude modulated modem

Info

Publication number
CA920239A
CA920239A CA096622A CA96622A CA920239A CA 920239 A CA920239 A CA 920239A CA 096622 A CA096622 A CA 096622A CA 96622 A CA96622 A CA 96622A CA 920239 A CA920239 A CA 920239A
Authority
CA
Canada
Prior art keywords
phase
amplitude modulated
modulated modem
modem
amplitude
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
CA096622A
Other languages
English (en)
Other versions
CA96622S (en
Inventor
G. Ragsdale Robert
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 COMMUNICATIONS Corp
Original Assignee
INTERNATIONAL COMMUNICATIONS 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25370910&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA920239(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by INTERNATIONAL COMMUNICATIONS Corp filed Critical INTERNATIONAL COMMUNICATIONS Corp
Application granted granted Critical
Publication of CA920239A publication Critical patent/CA920239A/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
    • H04L27/361—Modulation using a single or unspecified number of carriers, e.g. with separate stages of phase and amplitude modulation
    • 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
    • H04L27/389—Demodulator circuits; Receiver circuits with separate demodulation for the phase and amplitude components

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
CA096622A 1969-11-18 1970-10-27 Phase and amplitude modulated modem Expired CA920239A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87788069A 1969-11-18 1969-11-18

Publications (1)

Publication Number Publication Date
CA920239A true CA920239A (en) 1973-01-30

Family

ID=25370910

Family Applications (1)

Application Number Title Priority Date Filing Date
CA096622A Expired CA920239A (en) 1969-11-18 1970-10-27 Phase and amplitude modulated modem

Country Status (7)

Country Link
US (1) US3619503A (xx)
CA (1) CA920239A (xx)
CH (1) CH521693A (xx)
DE (1) DE2056670B2 (xx)
FR (1) FR2074929A5 (xx)
GB (1) GB1301337A (xx)
SE (1) SE375897B (xx)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE33056E (en) * 1971-09-14 1989-09-12 Codex Corporation Signal structures for double side band-quadrature carrier modulation
US3887768A (en) * 1971-09-14 1975-06-03 Codex Corp Signal structures for double side band-quadrature carrier modulation
US3988540A (en) * 1972-05-05 1976-10-26 Milgo Electronic Corporation Integrated circuit modem with a memory storage device for generating a modulated carrier signal
US3749843A (en) * 1972-05-08 1973-07-31 Bell Telephone Labor Inc Digital amplitude modulator
US3787785A (en) * 1972-05-15 1974-01-22 Collins Radio Co Phase representative digital signal modulating apparatus
FR2191796A5 (xx) * 1972-06-26 1974-02-01 Sagem
US3818346A (en) * 1972-10-12 1974-06-18 J Fletcher Differential phase-shift-keyed signal resolver
US3943285A (en) * 1973-05-10 1976-03-09 Milgo Electronic Corporation Multiplexed data modem
DE2324542C3 (de) * 1973-05-15 1979-01-25 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung zur frequenzdifferenziellen Phasenmodulation
GB1519972A (en) * 1974-07-19 1978-08-02 Nippon Telegraph & Telephone Data transmission system
US4217467A (en) * 1974-07-19 1980-08-12 Nippon Telegraph & Telephone Public Corporation Amplitude and periodic phase modulation transmission system
US3955141A (en) * 1974-10-18 1976-05-04 Intertel, Inc. Synchronizing circuit for modems in a data communications network
US4121050A (en) * 1977-02-02 1978-10-17 The United States Of America As Represented By The Secretary Of The Air Force Differential tri-phase shift keyed modulation
US4161628A (en) * 1978-01-31 1979-07-17 Harris Corporation Technique for tracking amplitude fades for multi-amplitude signalling
US4290140A (en) * 1978-02-23 1981-09-15 Northrop Corporation Combined coherent frequency and phase shift keying modulation system
US4170764A (en) * 1978-03-06 1979-10-09 Bell Telephone Laboratories, Incorporated Amplitude and frequency modulation system
US4355402A (en) * 1978-10-19 1982-10-19 Racal-Milgo, Inc. Data modem false equilibrium circuit
US4381560A (en) * 1980-10-24 1983-04-26 Bell Telephone Laboratories, Incorporated Multiplex transmitter apparatus
US4382297A (en) * 1980-10-24 1983-05-03 Bell Telephone Laboratories, Incorporated Demultiplex receiver apparatus
FR2571193A1 (fr) * 1981-12-28 1986-04-04 Lmt Radio Professionelle Emetteur et recepteur de messages constitues d'impulsions successives modulant une porteuse a frequence fixe
US4494239A (en) * 1982-05-26 1985-01-15 At&T Bell Laboratories Frame synchronization and phase ambiguity resolution in QAM transmission systems
FR2536610A1 (fr) * 1982-11-23 1984-05-25 Cit Alcatel Equipement de transmission synchrone de donnees
DE3243373A1 (de) * 1982-11-24 1984-07-26 ANT Nachrichtentechnik GmbH, 7150 Backnang Phasenumtastungs/amplitudenumtastungs (psk/ask)-system mit beliebiger stufenzahl
US4573166A (en) * 1983-06-24 1986-02-25 Wolfdata, Inc. Digital modem with plural microprocessors
FR2572603B1 (fr) * 1984-10-30 1989-11-17 Lignes Telegraph Telephon Demodulateur differentiel de signaux electriques a plusieurs etats d'amplitude et de phase pour equipements de transmission de donnees
US5555277A (en) * 1993-12-01 1996-09-10 Datapoint Corporation Technique for cancelling common mode switching noise to achieve reduced error rates in a local area network
FR2731572B1 (fr) * 1995-03-10 1997-06-27 France Telecom Signal module en phase et portant une surmodulation hierarchique, dispositif d'emission et recepteurs correspondants
US5796784A (en) * 1996-03-27 1998-08-18 Motorola, Inc. Method and apparatus for modifying amplitude of at least one symbol
FR2807252B1 (fr) * 2000-03-31 2003-01-10 Matra Nortel Communications Dispositif de production d'un signal radiofrequence module en phase et en amplitude
EP1402645A4 (en) * 2001-05-03 2006-08-23 Coreoptics Inc AMPLITUDE DETECTION FOR CONTROLLING THE TIME OF SAMPLING DECISION IN THE FORM OF A DATA STREAM
UA77621C2 (en) * 2006-09-21 2006-12-15 Method for transmitting digital data analog communication facilities

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128342A (en) * 1961-06-28 1964-04-07 Bell Telephone Labor Inc Phase-modulation transmitter
US3305636A (en) * 1963-05-14 1967-02-21 James E Webb Phase-shift data transmission system having a pseudo-noise sync code modulated with the data in a single channel
FR1403768A (fr) * 1964-05-12 1965-06-25 Cit Alcatel Télégraphie à modulation trivalente
US3406343A (en) * 1965-07-01 1968-10-15 Rca Corp Pm/am multiplex communication

Also Published As

Publication number Publication date
FR2074929A5 (xx) 1971-10-08
GB1301337A (xx) 1972-12-29
DE2056670A1 (de) 1971-05-27
CH521693A (de) 1972-04-15
US3619503A (en) 1971-11-09
SE375897B (xx) 1975-04-28
DE2056670B2 (de) 1979-06-13

Similar Documents

Publication Publication Date Title
CA920239A (en) Phase and amplitude modulated modem
CA950546A (en) Frequency modulator
CA958464A (en) Coherent single sideband phase locking technique
CA922788A (en) Frequency modulation signal demodulator
AU470551B2 (en) Improvements in or relating to phase modulation detectors
CA976621A (en) Digital amplitude modulator
CA1002616A (en) Angle modulated wave demodulation system
CA824762A (en) Vestigial-sideband frequency modulation modem
CA934831A (en) Serrasoid phase modulator
AU453069B2 (en) Cis-zearalenone and cis-zearalenol
CA929615A (en) Amplitude modulation system
CA948723A (en) Amplitude modulator
CA810019A (en) Container and lid assembly
AU3734768A (en) Amplitude modulator
CA945940A (en) Lid and container
CA1011410A (en) Phase modulating device
AU4101172A (en) Contianer carrier and spout
AU441604B2 (en) Frequency modulation demodulation system
CA905534A (en) Amplitude modulation system
CA829479A (en) Amplitude discriminator
AU434596B2 (en) An angle modulated wave demodulation apparatus
CA822279A (en) Frequency modulated reference controlled oscillator
AU440583B2 (en) Amplitude modulator without transformers
CA866396A (en) Dynamic amplitude recovery
CA818704A (en) Phase and frequency correction system