IT8567084A1 - Dispositivo di codifica-decodifica di un treno di segnali numerici binari per un modulatore-demodulatore numerico "OQPSK" a quattro stati di fase. - Google Patents

Dispositivo di codifica-decodifica di un treno di segnali numerici binari per un modulatore-demodulatore numerico "OQPSK" a quattro stati di fase.

Info

Publication number
IT8567084A1
IT8567084A1 IT1985A67084A IT6708485A IT8567084A1 IT 8567084 A1 IT8567084 A1 IT 8567084A1 IT 1985A67084 A IT1985A67084 A IT 1985A67084A IT 6708485 A IT6708485 A IT 6708485A IT 8567084 A1 IT8567084 A1 IT 8567084A1
Authority
IT
Italy
Prior art keywords
oqpsk
demodulator
train
coding
phase
Prior art date
Application number
IT1985A67084A
Other languages
English (en)
Other versions
IT1182390B (it
IT8567084A0 (it
Original Assignee
Alcatel Thomson Faisceaux Hertziens
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 Alcatel Thomson Faisceaux Hertziens filed Critical Alcatel Thomson Faisceaux Hertziens
Publication of IT8567084A0 publication Critical patent/IT8567084A0/it
Publication of IT8567084A1 publication Critical patent/IT8567084A1/it
Application granted granted Critical
Publication of IT1182390B publication Critical patent/IT1182390B/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
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • 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
    • H04L27/2078—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 phase change per symbol period is constrained
    • H04L27/2082—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 phase change per symbol period is constrained for offset or staggered quadrature phase shift keying

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
IT8567084A 1984-01-31 1985-01-30 Dispositivo di codifica decodifica di un treno di segnali numerici binari per un modulatore demodulatore numerico oqpsk a quattro stati di fase IT1182390B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8401466A FR2559006B1 (fr) 1984-01-31 1984-01-31 Dispositif de codage-decodage d'un train de signaux numeriques binaires pour modulateur-demodulateur numerique " oqpsk " a quatre etats de phase

Publications (3)

Publication Number Publication Date
IT8567084A0 IT8567084A0 (it) 1985-01-30
IT8567084A1 true IT8567084A1 (it) 1986-07-30
IT1182390B IT1182390B (it) 1987-10-05

Family

ID=9300624

Family Applications (1)

Application Number Title Priority Date Filing Date
IT8567084A IT1182390B (it) 1984-01-31 1985-01-30 Dispositivo di codifica decodifica di un treno di segnali numerici binari per un modulatore demodulatore numerico oqpsk a quattro stati di fase

Country Status (5)

Country Link
US (1) US4680775A (it)
JP (1) JPS60180359A (it)
FR (1) FR2559006B1 (it)
GB (1) GB2153637B (it)
IT (1) IT1182390B (it)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4736170A (en) * 1987-05-08 1988-04-05 Rca Corporation Unbalanced quarternary PSK modulator using unbalanced quadrature coupler
DE3728020A1 (de) * 1987-08-22 1989-03-02 Spectrospin Ag Verfahren zum vermindern des anteils an stoersignalen im ausgangssignal eines mischers und zur durchfuehrung des verfahrens ausgebildeter mischer
US4940954A (en) * 1988-04-12 1990-07-10 General Electric Company Unbalanced quadrature PSK modulator-limiter
US5084903A (en) * 1989-02-28 1992-01-28 First Pacific Networks Modulation and demodulation system employing AM-PSK and QPSK communication system using digital signals
US5025455A (en) * 1989-11-30 1991-06-18 The United States Of America As Represented By The Administer, National Aeronautics And Space Administration Phase ambiguity resolution for offset QPSK modulation systems
US4968956A (en) * 1989-12-04 1990-11-06 Trw Inc. Microwave phase modulator having a quadrature path with phase offset
US5381449A (en) * 1990-06-12 1995-01-10 Motorola, Inc. Peak to average power ratio reduction methodology for QAM communications systems
FR2711464B1 (fr) * 1993-10-19 1995-12-22 Telediffusion Fse Modulateur numérique à débit variable et son utilisation en radiodiffusion FM.
US6593827B2 (en) * 2001-11-16 2003-07-15 Lockheed Martin Corporation Modulating array transmitter autocalibration method and system
US7301967B2 (en) * 2002-12-13 2007-11-27 The United States Of America As Represented By The Secretary Of The Air Foece Method and apparatus for processing custom time division multiplexed signals
US7233632B1 (en) 2003-08-21 2007-06-19 L-3 Communications Corporation Symbol timing correction for a phase modulated signal with mutually interfering symbols
US7263139B1 (en) 2003-08-22 2007-08-28 L-3 Communications Corporation Phase correction for a phase modulated signal with mutually interfering symbols
KR101022239B1 (ko) 2011-01-10 2011-03-16 삼성탈레스 주식회사 Ｏｑｐｓｋ 변조 기법을 적용한 ｄｖｂ-ｒｃｓ 방식의 위성 단말 및 이를 이용한 송신 방법

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3371279A (en) * 1963-09-03 1968-02-27 Automatic Elect Lab Coherent recovery of phase-modulated dibits
US3522537A (en) * 1966-07-25 1970-08-04 Western Union Telegraph Co Vestigial sideband transmission system having two channels in quadrature
JPS5250487B2 (it) * 1972-02-04 1977-12-24
US3924186A (en) * 1974-02-07 1975-12-02 Ncr Co Staggered quadriphase differential encoder and decoder
JPS537762B2 (it) * 1974-08-14 1978-03-22
US4092491A (en) * 1977-04-04 1978-05-30 Bell Telephone Laboratories, Incorporated Differential encoding and decoding scheme for digital transmission systems
US4267591A (en) * 1979-04-17 1981-05-12 Cincinnati Electronics Corporation QPSK Suppressed carrier with rotating reference phase
FR2486741B1 (fr) * 1980-07-11 1988-03-11 Telecommunications Sa Procede et dispositif pour lever l'ambiguite de phase dans une liaison a modulation de phase quadrivalente
US4530094A (en) * 1982-09-28 1985-07-16 Ael Microtel, Limited Coding for odd error multiplication in digital systems with differential coding

Also Published As

Publication number Publication date
GB8502293D0 (en) 1985-02-27
GB2153637B (en) 1987-05-28
JPH0553346B2 (it) 1993-08-09
FR2559006B1 (fr) 1986-05-02
US4680775A (en) 1987-07-14
FR2559006A1 (fr) 1985-08-02
JPS60180359A (ja) 1985-09-14
GB2153637A (en) 1985-08-21
IT1182390B (it) 1987-10-05
IT8567084A0 (it) 1985-01-30

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TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19940131