TW371825B - Method of communicating information - Google Patents

Method of communicating information

Info

Publication number
TW371825B
TW371825B TW086119846A TW86119846A TW371825B TW 371825 B TW371825 B TW 371825B TW 086119846 A TW086119846 A TW 086119846A TW 86119846 A TW86119846 A TW 86119846A TW 371825 B TW371825 B TW 371825B
Authority
TW
Taiwan
Prior art keywords
information
subconstellation
transmission scheme
signal points
minimum distance
Prior art date
Application number
TW086119846A
Other languages
Chinese (zh)
Inventor
George D Forney Jr
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Application granted granted Critical
Publication of TW371825B publication Critical patent/TW371825B/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/25—Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded Modulation [TCM]
    • H03M13/256—Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded Modulation [TCM] with trellis coding, e.g. with convolutional codes and TCM
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/25—Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded Modulation [TCM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4917—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes
    • H04L25/4927—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes using levels matched to the quantisation levels of the channel

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Probability & Statistics with Applications (AREA)
  • Theoretical Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

System and device for and method of communicating according to Trellis Code of baseband signals chosen from a fixed set of baseband signal point. A first set of signal points define a first subconstellation, and a second set of signal points define a second subconstellation. The first subconstellation is characterized with a different minimum distance between adjacent signal points than the minimum distance for the second subconstellation. Under a PCM modem arrangement the first and second constellations respectively include set of signal points selected from the PSTN quantization rules, and the first subconstellation has a smaller minimum distance than the second. Information to be communicated is mapped to one of the first and second subconstellations. If the information maps to the first subconstellation, the information is transmitted according to a first transmission scheme; and if the information maps to the second subconstellation, the information is transmitted according to a second transmission scheme. Under a PCM modem arrangement, the first transmission scheme transmits information as coded information, for example, using a Trelli code, and the second transmission scheme transmits information as uncoded information. N-dimensional Trelli codes may be sued for the first transmission scheme and techniques are provided for recovering from lost synchronism and for avoiding catastrophic effects from lost synchronism.
TW086119846A 1997-01-17 1997-12-27 Method of communicating information TW371825B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78543497A 1997-01-17 1997-01-17

Publications (1)

Publication Number Publication Date
TW371825B true TW371825B (en) 1999-10-11

Family

ID=25135509

Family Applications (1)

Application Number Title Priority Date Filing Date
TW086119846A TW371825B (en) 1997-01-17 1997-12-27 Method of communicating information

Country Status (4)

Country Link
EP (1) EP0919087A4 (en)
AU (1) AU5898098A (en)
TW (1) TW371825B (en)
WO (1) WO1998032257A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI559773B (en) * 2011-03-15 2016-11-21 英特爾公司 Low memory access motion vector derivation

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100344137C (en) * 1997-12-29 2007-10-17 摩托罗拉公司 System, device and method for PCM upstream transmission utilizing optimized transmit constellation
EP0977410B1 (en) * 1998-07-30 2003-02-19 Infineon Technologies AG Method for generating PCM code sets
FR2784528A1 (en) * 1998-10-13 2000-04-14 Koninkl Philips Electronics Nv METHOD OF CONSTRUCTING A SET OF CONSTELLATIONS TO BE USED FOR TRANSMITTING DATA BETWEEN A TRANSMITTER AND A RECEIVER
US6414989B1 (en) 1999-09-10 2002-07-02 Conexant Systems, Inc. Upstream PCM transmission for a modem system
US7391816B2 (en) * 2003-09-17 2008-06-24 Intel Corporation Decoding upstream V.92-encoded signals
US9191148B2 (en) 2007-06-05 2015-11-17 Constellation Designs, Inc. Methods and apparatuses for signaling with geometric constellations in a Raleigh fading channel
EP4432588A2 (en) 2007-06-05 2024-09-18 Constellation Designs, LLC Method and apparatus for signaling with capacity optimized constellations
US8265175B2 (en) 2007-06-05 2012-09-11 Constellation Designs, Inc. Methods and apparatuses for signaling with geometric constellations

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495619A (en) * 1981-10-23 1985-01-22 At&T Bell Laboratories Transmitter and receivers using resource sharing and coding for increased capacity
US4891806A (en) * 1987-09-18 1990-01-02 Racal Data Communications Inc. Constellation multiplexed inband secondary channel for voiceband modem
US4937844A (en) * 1988-11-03 1990-06-26 Racal Data Communications Inc. Modem with data compression selected constellation
US5343500A (en) * 1991-09-03 1994-08-30 At&T Bell Laboratories Non-linear encoder and decoder for information transmission through non-linear channels
US5544328A (en) * 1991-10-31 1996-08-06 At&T Bell Laboratories Coded modulation with unequal error protection
US5377194A (en) * 1991-12-16 1994-12-27 At&T Corp. Multiplexed coded modulation with unequal error protection
US5363408A (en) * 1992-03-24 1994-11-08 General Instrument Corporation Mode selective quadrature amplitude modulation communication system
US5659579A (en) * 1995-02-01 1997-08-19 Lucent Technologies Inc. Multilevel coding for fractional bits
US6081555A (en) * 1996-12-04 2000-06-27 Conexant Systems, Inc. Methods and apparatus for implementing shell mapping techniques in the context of a PCM-based modem communications system
WO1998025384A2 (en) * 1996-12-04 1998-06-11 Fernway Limited A method for trellis coding a logarithmic distribution of constellation points

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI559773B (en) * 2011-03-15 2016-11-21 英特爾公司 Low memory access motion vector derivation

Also Published As

Publication number Publication date
WO1998032257A1 (en) 1998-07-23
EP0919087A4 (en) 2001-08-16
EP0919087A1 (en) 1999-06-02
AU5898098A (en) 1998-08-07

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees