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DE3683904D1 - Mehrpegeliges qam-uebertragungssystem mit zusaetzlichen signalpunkten. - Google Patents

Mehrpegeliges qam-uebertragungssystem mit zusaetzlichen signalpunkten.

Info

Publication number
DE3683904D1
DE3683904D1 DE8686116135T DE3683904T DE3683904D1 DE 3683904 D1 DE3683904 D1 DE 3683904D1 DE 8686116135 T DE8686116135 T DE 8686116135T DE 3683904 T DE3683904 T DE 3683904T DE 3683904 D1 DE3683904 D1 DE 3683904D1
Authority
DE
Germany
Prior art keywords
transmission system
signal points
additional signal
level qam
qam 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
DE8686116135T
Other languages
English (en)
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 JP60262846A external-priority patent/JPH0648830B2/ja
Priority claimed from JP60262847A external-priority patent/JPH0648831B2/ja
Application filed by NEC Corp filed Critical NEC Corp
Application granted granted Critical
Publication of DE3683904D1 publication Critical patent/DE3683904D1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/0292—Multiple configuration seats, e.g. for spacious vehicles or mini-buses
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
DE8686116135T 1985-11-21 1986-11-21 Mehrpegeliges qam-uebertragungssystem mit zusaetzlichen signalpunkten. Expired - Fee Related DE3683904D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP60262846A JPH0648830B2 (ja) 1985-11-21 1985-11-21 変調装置
JP60262847A JPH0648831B2 (ja) 1985-11-21 1985-11-21 復調装置

Publications (1)

Publication Number Publication Date
DE3683904D1 true DE3683904D1 (de) 1992-03-26

Family

ID=26545740

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686116135T Expired - Fee Related DE3683904D1 (de) 1985-11-21 1986-11-21 Mehrpegeliges qam-uebertragungssystem mit zusaetzlichen signalpunkten.

Country Status (5)

Country Link
US (1) US4721928A (de)
EP (1) EP0229923B1 (de)
AU (1) AU577025B2 (de)
CA (1) CA1257664A (de)
DE (1) DE3683904D1 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1301864C (en) * 1987-02-19 1992-05-26 Sadao Takenaka Multilevel amplitude modulation and demodulation communication system
JPS6455942A (en) * 1987-08-27 1989-03-02 Fujitsu Ltd Multi-value quadrature amplitude modulation demodulation system
JPH0771117B2 (ja) * 1988-06-30 1995-07-31 日本電気株式会社 符号誤り訂正装置
US5022053A (en) * 1989-04-10 1991-06-04 At&T Bell Laboratories Data communications with alternation of signaling constellations
US5099478A (en) * 1989-05-23 1992-03-24 A.T.& T. Paradyne Communication of secondary channel byte in a synchronous modem without statistical uncertainty
GB9016420D0 (en) * 1990-07-26 1990-09-12 British Telecomm Block coded modulation
US5115453A (en) * 1990-10-01 1992-05-19 At&T Bell Laboratories Technique for designing a multidimensional signaling scheme
WO1992017972A1 (en) * 1991-03-28 1992-10-15 British Telecommunications Public Limited Company Frame synchronisation for qam
US5559791A (en) * 1993-06-14 1996-09-24 Lucent Technologies Inc. Companding of voice signal for simultaneous voice and data transmission
JP3246471B2 (ja) * 1999-03-31 2002-01-15 日本電気株式会社 マルチレート送信装置
FR2797233B1 (fr) * 1999-08-06 2001-08-31 Renault Dispositif pour la transmission de signaux entre une unite de controle et de commande d'un vehicule automobile et un equipement monte sur un sous-ensemble de celui-ci
JP2007163725A (ja) * 2005-12-13 2007-06-28 Seiko Epson Corp 画像表示システム、画像表示方法、情報処理装置、画像表示装置、制御プログラム、および記録媒体
JP2008058574A (ja) 2006-08-31 2008-03-13 Seiko Epson Corp 画像表示システムおよび画像表示装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4597090A (en) * 1983-04-14 1986-06-24 Codex Corporation Block coded modulation 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
US4750191A (en) 1984-11-06 1988-06-07 Nec Corporation D/A converter capable of producing an analog signal having levels of a preselected number different from 2N and communication network comprising the D/A converter
US4716385A (en) * 1985-07-24 1987-12-29 Nec Corporation Multilevel modulator comprising a compact error correcting code producing unit

Also Published As

Publication number Publication date
US4721928A (en) 1988-01-26
AU6555686A (en) 1987-05-28
EP0229923A3 (en) 1988-01-27
CA1257664A (en) 1989-07-18
EP0229923A2 (de) 1987-07-29
AU577025B2 (en) 1988-09-08
EP0229923B1 (de) 1992-02-12

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee