DE3785781D1 - Zusammengesetztes qam-psk-uebertragungssystem. - Google Patents

Zusammengesetztes qam-psk-uebertragungssystem.

Info

Publication number
DE3785781D1
DE3785781D1 DE8787101752T DE3785781T DE3785781D1 DE 3785781 D1 DE3785781 D1 DE 3785781D1 DE 8787101752 T DE8787101752 T DE 8787101752T DE 3785781 T DE3785781 T DE 3785781T DE 3785781 D1 DE3785781 D1 DE 3785781D1
Authority
DE
Germany
Prior art keywords
qam
transmission system
psk transmission
psk
transmission
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 - Fee Related
Application number
DE8787101752T
Other languages
English (en)
Other versions
DE3785781T2 (de
Inventor
Yasuharu Yoshida
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.)
NEC Corp
Original Assignee
NEC 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
Priority claimed from JP61024950A external-priority patent/JPH0712178B2/ja
Priority claimed from JP62005136A external-priority patent/JPH082045B2/ja
Application filed by NEC Corp filed Critical NEC Corp
Publication of DE3785781D1 publication Critical patent/DE3785781D1/de
Application granted granted Critical
Publication of DE3785781T2 publication Critical patent/DE3785781T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04L27/363—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated using non - square modulating pulses, modulators specifically designed for this
    • 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
    • H04L27/345—Modifications of the signal space to allow the transmission of additional information
    • H04L27/3461—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel
    • 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
    • H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers
    • H04L27/3827—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers in which the carrier is recovered using only the demodulated baseband signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
DE8787101752T 1986-02-08 1987-02-09 Zusammengesetztes qam-psk-uebertragungssystem. Expired - Fee Related DE3785781T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP61024950A JPH0712178B2 (ja) 1986-02-08 1986-02-08 デイジタル変復調システム
JP62005136A JPH082045B2 (ja) 1987-01-14 1987-01-14 デイジタル伝送システム

Publications (2)

Publication Number Publication Date
DE3785781D1 true DE3785781D1 (de) 1993-06-17
DE3785781T2 DE3785781T2 (de) 1993-09-02

Family

ID=26339044

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787101752T Expired - Fee Related DE3785781T2 (de) 1986-02-08 1987-02-09 Zusammengesetztes qam-psk-uebertragungssystem.

Country Status (5)

Country Link
US (1) US4751478A (de)
EP (1) EP0238822B1 (de)
AU (1) AU589084B2 (de)
CA (1) CA1268828A (de)
DE (1) DE3785781T2 (de)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0771117B2 (ja) * 1988-06-30 1995-07-31 日本電気株式会社 符号誤り訂正装置
US4942591A (en) * 1989-03-07 1990-07-17 Agilis Corporation Multiple phase PSK demodulator
JPH02295260A (ja) * 1989-05-10 1990-12-06 Toshiba Corp 変調器
EP0407673B1 (de) * 1989-07-12 1994-05-11 International Business Machines Corporation Verfahren zum Synchronisieren eines einfangenden Modems nach einem Training mit Daten
JPH03249847A (ja) * 1990-02-27 1991-11-07 Nec Corp 変復調装置
USRE39890E1 (en) 1991-03-27 2007-10-23 Matsushita Electric Industrial Co., Ltd. Communication system
USRE42643E1 (en) 1991-03-27 2011-08-23 Panasonic Corporation Communication system
DE69232530T2 (de) * 1991-03-27 2002-11-07 Matsushita Electric Industrial Co., Ltd. Signalübertragungssystem
US5600672A (en) 1991-03-27 1997-02-04 Matsushita Electric Industrial Co., Ltd. Communication system
USRE40241E1 (en) 1991-03-27 2008-04-15 Matsushita Electric Industrial Co., Ltd. Communication system
USRE38513E1 (en) 1992-03-26 2004-05-11 Matsushita Electric Industrial Co., Ltd. Communication system
US7894541B2 (en) * 1992-03-26 2011-02-22 Panasonic Corporation Communication system
US5802241A (en) 1992-03-26 1998-09-01 Matsushita Electric Industrial Co., Ltd. Communication system
US5892879A (en) 1992-03-26 1999-04-06 Matsushita Electric Industrial Co., Ltd. Communication system for plural data streams
US6728467B2 (en) * 1992-03-26 2004-04-27 Matsushita Electric Industrial Co., Ltd. Communication system
US7302007B1 (en) 1992-03-26 2007-11-27 Matsushita Electric Industrial Co., Ltd. Communication system
CN1032099C (zh) * 1992-03-26 1996-06-19 松下电器产业株式会社 通信***
US6724976B2 (en) 1992-03-26 2004-04-20 Matsushita Electric Industrial Co., Ltd. Communication system
US5673292A (en) * 1994-10-07 1997-09-30 Northrop Grumman Corporation AM-PSK system for broadcasting a composite analog and digital signal using adaptive M-ary PSK modulation
EP0717491B1 (de) * 1994-12-13 2003-02-26 Hughes Electronics Corporation Synthetisierer hoher Präzision sowie niedrigen Phasenrauschens, mit Vektormodulator
US6366620B1 (en) 1994-12-13 2002-04-02 Hughes Electronics Corporation VSAT system
GB2307152B (en) * 1995-11-10 1999-04-07 Motorola Ltd Method and apparatus for enhanced communication capability while maintaining standard channel modulation compatibility
JP3140974B2 (ja) * 1996-03-31 2001-03-05 富士通株式会社 判定方法及びプリコーダ装置
JP3118419B2 (ja) * 1996-06-07 2000-12-18 株式会社ケンウッド Ａｍデータ多重変調装置
EP0899923A1 (de) * 1997-08-29 1999-03-03 Sony International (Europe) GmbH Übertragung von Leistungssteuersignalen in Mehrträgermodulationssystemen
US6101225A (en) * 1998-04-29 2000-08-08 Motorola, Inc. Method and apparatus for performing a modulation
US7423987B2 (en) 2001-04-27 2008-09-09 The Directv Group, Inc. Feeder link configurations to support layered modulation for digital signals
US7471735B2 (en) 2001-04-27 2008-12-30 The Directv Group, Inc. Maximizing power and spectral efficiencies for layered and conventional modulations
US7778365B2 (en) 2001-04-27 2010-08-17 The Directv Group, Inc. Satellite TWTA on-line non-linearity measurement
US8005035B2 (en) 2001-04-27 2011-08-23 The Directv Group, Inc. Online output multiplexer filter measurement
US7822154B2 (en) 2001-04-27 2010-10-26 The Directv Group, Inc. Signal, interference and noise power measurement
US7583728B2 (en) 2002-10-25 2009-09-01 The Directv Group, Inc. Equalizers for layered modulated and other signals
US7738587B2 (en) 2002-07-03 2010-06-15 The Directv Group, Inc. Method and apparatus for layered modulation
ES2398213T3 (es) 2002-10-25 2013-03-14 The Directv Group, Inc. Procesador de señal de modulación en capas de baja complejidad
US7023292B2 (en) * 2003-12-17 2006-04-04 Telefonaktiebolaget L.M. Dericsson Polar modulation using amplitude modulated quadrature signals
EP1956523B1 (de) * 2007-02-02 2013-05-29 Semiconductor Energy Laboratory Co., Ltd. Drahtloses Identifikationssystem, Halbleiterbauelement und Kommunikationsvorrichtung
US8009050B2 (en) * 2007-02-02 2011-08-30 Semiconductor Energy Laboratory Co., Ltd. Wireless system, semiconductor device, and communication device
WO2013150704A1 (ja) * 2012-04-03 2013-10-10 パナソニック株式会社 映像データ送信装置及び受信装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4404532A (en) * 1978-09-29 1983-09-13 Communications Satellite Corporation Modulator having improved bandwidth and power requirements
JPS58194450A (ja) * 1982-05-07 1983-11-12 Nec Corp 復調装置
US4525846A (en) * 1982-12-27 1985-06-25 Paradyne Corporation Modem in-band secondary channel via radial modulation
JPH063947B2 (ja) * 1983-03-16 1994-01-12 日本電気株式会社 自動利得制御回路
CA1232022A (en) * 1983-11-30 1988-01-26 Eisuke Fukuda Radio communication system
JPS6177452A (ja) * 1984-09-25 1986-04-21 Nec Corp 多値直交振幅変調方法および装置
DE3687249T2 (de) * 1985-08-15 1993-04-15 Nippon Electric Co Zur synchronisationsherstellung in einem uebergangszustand geeignetes demodulationssystem.

Also Published As

Publication number Publication date
AU6858787A (en) 1987-08-13
EP0238822A3 (en) 1989-04-26
US4751478A (en) 1988-06-14
EP0238822A2 (de) 1987-09-30
AU589084B2 (en) 1989-09-28
DE3785781T2 (de) 1993-09-02
CA1268828A (en) 1990-05-08
EP0238822B1 (de) 1993-05-12

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Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee