DE3068202D1 - Double sideband quadrature carrier modulation system and method of transmitting information using the point constellation of such a system - Google Patents

Double sideband quadrature carrier modulation system and method of transmitting information using the point constellation of such a system

Info

Publication number
DE3068202D1
DE3068202D1 DE8080302927T DE3068202T DE3068202D1 DE 3068202 D1 DE3068202 D1 DE 3068202D1 DE 8080302927 T DE8080302927 T DE 8080302927T DE 3068202 T DE3068202 T DE 3068202T DE 3068202 D1 DE3068202 D1 DE 3068202D1
Authority
DE
Germany
Prior art keywords
carrier modulation
quadrature carrier
transmitting information
double sideband
point constellation
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
Application number
DE8080302927T
Other languages
English (en)
Inventor
Thomas R Armstrong
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.)
Paradyne Corp
Original Assignee
Paradyne 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
Application filed by Paradyne Corp filed Critical Paradyne Corp
Application granted granted Critical
Publication of DE3068202D1 publication Critical patent/DE3068202D1/de
Expired 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
    • H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
    • H04L27/3411—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power reducing the peak to average power ratio or the mean power of the constellation; Arrangements for increasing the shape gain of a signal set

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
DE8080302927T 1979-08-31 1980-08-22 Double sideband quadrature carrier modulation system and method of transmitting information using the point constellation of such a system Expired DE3068202D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/071,734 US4271527A (en) 1979-08-31 1979-08-31 Double side band-quadrature carrier modulation signal structures

Publications (1)

Publication Number Publication Date
DE3068202D1 true DE3068202D1 (en) 1984-07-19

Family

ID=22103235

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8080302927T Expired DE3068202D1 (en) 1979-08-31 1980-08-22 Double sideband quadrature carrier modulation system and method of transmitting information using the point constellation of such a system

Country Status (5)

Country Link
US (1) US4271527A (de)
EP (1) EP0031193B1 (de)
JP (1) JPS5652954A (de)
AT (1) ATE7994T1 (de)
DE (1) DE3068202D1 (de)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2913669C2 (de) * 1979-04-05 1981-12-10 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zum Erzeugen von Modem-Sendesignalen mit Quadratur-Amplituden-Modulation QAM
GB2118003B (en) * 1982-02-02 1985-07-31 Racal Milgo Ltd Differential encoder and decoder for transmitting binary data
US4646305A (en) * 1983-09-26 1987-02-24 Case Communications, Inc. High speed data modem using multilevel encoding
US4660213A (en) * 1983-11-22 1987-04-21 Infinet, Inc. Signal structure for data communication
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
US4644537A (en) * 1984-12-24 1987-02-17 American Telephone And Telegraph Company Inband coding of secondary data
US4651320A (en) * 1984-12-24 1987-03-17 American Telephone And Telegraph Company Inband coding of secondary data
US4660214A (en) * 1985-08-01 1987-04-21 Infinet, Inc. QANI Trellis-coded signal structure
JPH07112208B2 (ja) * 1987-02-19 1995-11-29 富士通株式会社 多値振幅変復調方式通信システム
JPH02217045A (ja) * 1989-02-17 1990-08-29 Fujitsu Ltd 信号点配置方式
WO1992010899A1 (en) * 1990-12-12 1992-06-25 AUSTRALIAN AND OVERSEAS TELECOMMUNICATIONS CORPORATION LIMITED: 231 Elizabeth Street Improved qam encoding
KR960002703B1 (ko) * 1991-03-27 1996-02-24 마쯔시다덴기산교 가부시기가이샤 전송장치
USRE40241E1 (en) 1991-03-27 2008-04-15 Matsushita Electric Industrial Co., Ltd. Communication system
USRE39890E1 (en) 1991-03-27 2007-10-23 Matsushita Electric Industrial Co., Ltd. Communication system
EP0975171B1 (de) * 1991-03-27 2002-03-27 Matsushita Electric Industrial Co., Ltd. Signalübertragungssystem
US5600672A (en) 1991-03-27 1997-02-04 Matsushita Electric Industrial Co., Ltd. Communication system
USRE42643E1 (en) 1991-03-27 2011-08-23 Panasonic Corporation Communication system
US6728467B2 (en) * 1992-03-26 2004-04-27 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
US5802241A (en) 1992-03-26 1998-09-01 Matsushita Electric Industrial Co., Ltd. Communication system
US6724976B2 (en) * 1992-03-26 2004-04-20 Matsushita Electric Industrial Co., Ltd. Communication system
CA2332405C (en) * 1992-03-26 2007-01-23 Matsushita Electric Industrial Co., Ltd. Communication system
USRE38513E1 (en) 1992-03-26 2004-05-11 Matsushita Electric Industrial Co., Ltd. Communication system
US7302007B1 (en) 1992-03-26 2007-11-27 Matsushita Electric Industrial Co., Ltd. Communication system
US7894541B2 (en) * 1992-03-26 2011-02-22 Panasonic Corporation Communication system
US5832041A (en) * 1994-10-21 1998-11-03 Philips Electronics North America Corporation 64 QAM signal constellation which is robust in the presence of phase noise and has decoding complexity

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5038488B1 (de) * 1970-08-14 1975-12-10
US3887768A (en) * 1971-09-14 1975-06-03 Codex Corp Signal structures for double side band-quadrature carrier modulation
US3988539A (en) * 1974-09-16 1976-10-26 Hycom Incorporated Data transmission system using optimal eight-vector signaling scheme
US3983485A (en) * 1975-02-28 1976-09-28 Rixon Inc. Multi-phase and multi-amplitude level modulator and modulation and demodulation methods
IT1030453B (it) * 1975-03-27 1979-03-30 Cselt Centro Studi Lab Telecom Organo di decisione per ricevitori di segnali numerici a piu livelli modulati in fase o in fase e ampiezza
FR2335109A1 (fr) * 1975-12-09 1977-07-08 Ibm France Procede et dispositif de detection statistique de donnees
US4135057A (en) * 1976-09-07 1979-01-16 Arthur A. Collins, Inc. High density digital transmission system

Also Published As

Publication number Publication date
US4271527A (en) 1981-06-02
EP0031193B1 (de) 1984-06-13
ATE7994T1 (de) 1984-06-15
JPS5652954A (en) 1981-05-12
EP0031193A1 (de) 1981-07-01
JPS6324342B2 (de) 1988-05-20

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Legal Events

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