IT991725B - Sistema di modulazione quadrifase per trasmissione di informazioni numeriche - Google Patents

Sistema di modulazione quadrifase per trasmissione di informazioni numeriche

Info

Publication number
IT991725B
IT991725B IT69081/73A IT6908173A IT991725B IT 991725 B IT991725 B IT 991725B IT 69081/73 A IT69081/73 A IT 69081/73A IT 6908173 A IT6908173 A IT 6908173A IT 991725 B IT991725 B IT 991725B
Authority
IT
Italy
Prior art keywords
transmission
phase modulation
numerical information
modulation system
numerical
Prior art date
Application number
IT69081/73A
Other languages
English (en)
Inventor
G 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
Application filed by Cselt Centro Studi Lab Telecom filed Critical Cselt Centro Studi Lab Telecom
Priority to IT69081/73A priority Critical patent/IT991725B/it
Priority to DE19742431844 priority patent/DE2431844C3/de
Priority to SE7408875A priority patent/SE394565B/xx
Priority to NL7409296.A priority patent/NL167567C/xx
Priority to US486999A priority patent/US3914695A/en
Priority to CA204,555A priority patent/CA1060554A/en
Priority to GB30720/74A priority patent/GB1478661A/en
Priority to CH971074A priority patent/CH596719A5/xx
Application granted granted Critical
Publication of IT991725B publication Critical patent/IT991725B/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
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
    • H04L27/206—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
    • H04L27/2067—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states
    • H04L27/2071—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the data are represented by the carrier phase, e.g. systems with differential coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
IT69081/73A 1973-07-12 1973-07-12 Sistema di modulazione quadrifase per trasmissione di informazioni numeriche IT991725B (it)

Priority Applications (8)

Application Number Priority Date Filing Date Title
IT69081/73A IT991725B (it) 1973-07-12 1973-07-12 Sistema di modulazione quadrifase per trasmissione di informazioni numeriche
DE19742431844 DE2431844C3 (de) 1973-07-12 1974-07-02 Verfahren und Anordnung zur Durchführung der Modulation in einem quaternären Phasensprung-Modulationssystem
SE7408875A SE394565B (sv) 1973-07-12 1974-07-05 Forfarande for modulering i ett kvaternert fasskiftmoduleringsystem samt anordning for genomforandet en forfarandet
NL7409296.A NL167567C (nl) 1973-07-12 1974-07-09 Stelsel voor digitale overdracht onder toepassing van een vierfasenmodulatiestelsel.
US486999A US3914695A (en) 1973-07-12 1974-07-10 Data transmission with dual PSK modulation
CA204,555A CA1060554A (en) 1973-07-12 1974-07-11 Data transmission with dual psk modulation
GB30720/74A GB1478661A (en) 1973-07-12 1974-07-11 Qpsk digital transmission systems
CH971074A CH596719A5 (it) 1973-07-12 1974-07-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT69081/73A IT991725B (it) 1973-07-12 1973-07-12 Sistema di modulazione quadrifase per trasmissione di informazioni numeriche

Publications (1)

Publication Number Publication Date
IT991725B true IT991725B (it) 1975-08-30

Family

ID=11311299

Family Applications (1)

Application Number Title Priority Date Filing Date
IT69081/73A IT991725B (it) 1973-07-12 1973-07-12 Sistema di modulazione quadrifase per trasmissione di informazioni numeriche

Country Status (7)

Country Link
US (1) US3914695A (it)
CA (1) CA1060554A (it)
CH (1) CH596719A5 (it)
GB (1) GB1478661A (it)
IT (1) IT991725B (it)
NL (1) NL167567C (it)
SE (1) SE394565B (it)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106007A (en) * 1974-07-17 1978-08-08 New England Power Service Company Method and apparatus for transmitting intelligence over a carrier wave
US4180793A (en) * 1978-04-26 1979-12-25 The United States Of America As Represented By The Secretary Of The Navy PSK pulse synthesizer
IT1160910B (it) * 1978-10-27 1987-03-11 Cselt Centro Studi Lab Telecom Sistema di modulazione quadrifase per trasmissione di informazioni numeriche
US4311971A (en) * 1979-09-19 1982-01-19 Hazeltine Corporation Apparatus for generating constant-envelope, angle-modulated pulse signals
US4528526A (en) * 1983-05-31 1985-07-09 Motorola, Inc. PSK modulator with noncollapsable output for use with a PLL power amplifier
US4726038A (en) * 1985-01-22 1988-02-16 Fumio Ikegami Digital communication system
EP0197529B1 (de) * 1985-04-23 1992-02-05 Josef Dirr Verfahren für die analoge oder digitale Codierung von Information für die Verwendung bei Winkel- und Pulsmodulationsverfahren
US4937840A (en) * 1988-11-07 1990-06-26 William Hotine Circuit for pulsed biphase digital modulation
FR2652470A1 (fr) * 1989-09-28 1991-03-29 Alcatel Transmission Procede et dispositif de limitation des remontees de lobes secondaires dans une installation d'emission de puissance pour monoporteuse numerique a deux ou quatre etats de phase.
US6101225A (en) * 1998-04-29 2000-08-08 Motorola, Inc. Method and apparatus for performing a modulation
US6944141B1 (en) * 1999-10-22 2005-09-13 Lucent Technologies Inc. Systems and method for phase multiplexing in assigning frequency channels for a wireless communication network
US6993306B2 (en) * 2002-01-22 2006-01-31 Broadcom Corporation Determination and processing for fractional-N programming values

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3051902A (en) * 1958-02-17 1962-08-28 Karl F Ross Angle-modulation system
US3423529A (en) * 1966-02-01 1969-01-21 Bell Telephone Labor Inc Automatic phase recovery in suppressed carrier quadrature modulated biternary communication systems

Also Published As

Publication number Publication date
NL167567B (nl) 1981-07-16
DE2431844B2 (de) 1976-04-22
US3914695A (en) 1975-10-21
DE2431844A1 (de) 1975-01-30
CA1060554A (en) 1979-08-14
GB1478661A (en) 1977-07-06
NL7409296A (nl) 1975-01-14
SE7408875L (sv) 1975-01-13
NL167567C (nl) 1981-12-16
SE394565B (sv) 1977-06-27
CH596719A5 (it) 1978-03-15

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