DE68917997D1 - Verfahren zur Quadraturamplitudenmodulation. - Google Patents

Verfahren zur Quadraturamplitudenmodulation.

Info

Publication number
DE68917997D1
DE68917997D1 DE68917997T DE68917997T DE68917997D1 DE 68917997 D1 DE68917997 D1 DE 68917997D1 DE 68917997 T DE68917997 T DE 68917997T DE 68917997 T DE68917997 T DE 68917997T DE 68917997 D1 DE68917997 D1 DE 68917997D1
Authority
DE
Germany
Prior art keywords
amplitude modulation
modulation method
quadrature amplitude
quadrature
modulation
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
DE68917997T
Other languages
English (en)
Other versions
DE68917997T2 (de
Inventor
Paul Alan Kennard
Joseph Leslie Middleton
Kuang-Tsan Wu
John Duncan Mcnicol
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Application granted granted Critical
Publication of DE68917997D1 publication Critical patent/DE68917997D1/de
Publication of DE68917997T2 publication Critical patent/DE68917997T2/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
    • H04L27/345—Modifications of the signal space to allow the transmission of additional information
    • H04L27/3455—Modifications of the signal space to allow the transmission of additional information in order to facilitate carrier recovery at the receiver end, e.g. by transmitting a pilot or by using additional signal points to allow the detection of rotations

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
DE1989617997 1988-06-10 1989-06-05 Verfahren zur Quadraturamplitudenmodulation. Expired - Fee Related DE68917997T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000569280A CA1295700C (en) 1988-06-10 1988-06-10 Method of quadrature-phase amplitude modulation

Publications (2)

Publication Number Publication Date
DE68917997D1 true DE68917997D1 (de) 1994-10-13
DE68917997T2 DE68917997T2 (de) 1995-01-26

Family

ID=4138186

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1989617997 Expired - Fee Related DE68917997T2 (de) 1988-06-10 1989-06-05 Verfahren zur Quadraturamplitudenmodulation.

Country Status (4)

Country Link
EP (1) EP0346036B1 (de)
JP (1) JP2512556B2 (de)
CA (1) CA1295700C (de)
DE (1) DE68917997T2 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4208090C1 (de) * 1992-03-13 1993-05-13 Ant Nachrichtentechnik Gmbh, 7150 Backnang, De
US20060133338A1 (en) 2004-11-23 2006-06-22 Interdigital Technology Corporation Method and system for securing wireless communications
EP2509271B1 (de) * 2009-12-01 2019-08-07 Nec Corporation Datenübertragungsverfahren, datenempfangsverfahren, datenmodulationsvorrichtung und datendemodulationsvorrichtung
US9209834B2 (en) * 2012-06-12 2015-12-08 Broadcom Corporation Symbol mapping for binary coding

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2103456B (en) * 1981-06-22 1985-04-24 Gen Electric Co Plc Digital data transmission systems
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

Also Published As

Publication number Publication date
JP2512556B2 (ja) 1996-07-03
CA1295700C (en) 1992-02-11
EP0346036A2 (de) 1989-12-13
DE68917997T2 (de) 1995-01-26
EP0346036B1 (de) 1994-09-07
EP0346036A3 (en) 1990-05-09
JPH0244839A (ja) 1990-02-14

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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