TW285792B - - Google Patents

Info

Publication number
TW285792B
TW285792B TW085100839A TW85100839A TW285792B TW 285792 B TW285792 B TW 285792B TW 085100839 A TW085100839 A TW 085100839A TW 85100839 A TW85100839 A TW 85100839A TW 285792 B TW285792 B TW 285792B
Authority
TW
Taiwan
Application number
TW085100839A
Original Assignee
At & T 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 At & T Corp filed Critical At & T Corp
Application granted granted Critical
Publication of TW285792B publication Critical patent/TW285792B/zh

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • 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
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/23—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using convolutional codes, e.g. unit memory codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03343—Arrangements at the transmitter end
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0098—Unequal error protection

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Probability & Statistics with Applications (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Error Detection And Correction (AREA)
  • Detection And Correction Of Errors (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
TW085100839A 1995-02-01 1996-01-24 TW285792B (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/384,514 US5659579A (en) 1995-02-01 1995-02-01 Multilevel coding for fractional bits

Publications (1)

Publication Number Publication Date
TW285792B true TW285792B (zh) 1996-09-11

Family

ID=23517626

Family Applications (1)

Application Number Title Priority Date Filing Date
TW085100839A TW285792B (zh) 1995-02-01 1996-01-24

Country Status (7)

Country Link
US (1) US5659579A (zh)
EP (1) EP0725487A3 (zh)
JP (1) JP3489705B2 (zh)
KR (1) KR100383029B1 (zh)
CN (1) CN1108664C (zh)
CA (1) CA2167746C (zh)
TW (1) TW285792B (zh)

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FR2751811B1 (fr) * 1996-07-24 1998-10-09 Matra Communication Procede de demodulation numerique
US5818879A (en) * 1996-10-15 1998-10-06 Motorola Inc. Device, system and method for spectrally shaping transmitted data signals
GB2332605B (en) * 1996-09-24 2001-05-16 Motorola Inc System for processing baseband signals to combat ISI and non-linearities in a communication system
CA2267362A1 (en) * 1996-09-25 1998-04-02 Pierre A. Humblet Device, system and method for spectrally shaping transmitted data signals
US5926505A (en) * 1996-10-16 1999-07-20 Cirrus Logic, Inc. Device, system, and method for modem communication utilizing two-step mapping
US6198776B1 (en) * 1996-11-13 2001-03-06 Motorola Inc. Device and method for precoding data signals for PCM transmission
US5812602A (en) * 1996-11-14 1998-09-22 Motorola Inc. System and device for, and method of, communicating according to a trellis code of baseband signals chosen from a fixed set of baseband signal points
US5995548A (en) * 1996-11-15 1999-11-30 3Com Corporation Signaling method using multiple modulus shell mapping
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
EP0851621B1 (en) * 1996-12-23 2004-06-09 Canon Kabushiki Kaisha Coded modulation for constellations with fewer bit per symbol than that which the coding scheme requires
EP0919087A4 (en) * 1997-01-17 2001-08-16 Motorola Inc SYSTEM, DEVICE AND METHOD FOR COMMUNICATING ACCORDING TO A COMPOSITE CODE
US6084915A (en) * 1997-03-03 2000-07-04 3Com Corporation Signaling method having mixed-base shell map indices
WO1998039883A1 (en) * 1997-03-03 1998-09-11 3Com Corporation Signalling method using multiple modulus conversion and shell mapping
US6084883A (en) * 1997-07-07 2000-07-04 3Com Corporation Efficient data transmission over digital telephone networks using multiple modulus conversion
US6222890B1 (en) * 1997-04-08 2001-04-24 Vocal Technologies, Ltd. Variable spectral shaping method for PCM modems
US5831561A (en) * 1997-04-29 1998-11-03 Lucent Technologies Inc. System and method for dynamically optimizing a symbol table and modem employing the same
US5970098A (en) * 1997-05-02 1999-10-19 Globespan Technologies, Inc. Multilevel encoder
JPH10336147A (ja) * 1997-06-03 1998-12-18 Oki Electric Ind Co Ltd Ｃｄｍａ送受信装置および送信レート可変方法
DE69839814D1 (de) * 1997-12-29 2008-09-11 Motorola Inc Methode und apparat zum auswählen eines konstellationspunktes für jede gruppe von datenbits, welche durch ein analoges pcm-modem übertragen werden sollen
US6034991A (en) * 1998-01-26 2000-03-07 Conexant Systems, Inc. Method and apparatus for implementing enhanced multiple modulus conversion techniques in a signal point mapping context
US6950444B1 (en) * 1999-08-24 2005-09-27 Paradyne Corporation System and method for a robust preamble and transmission delimiting in a switched-carrier transceiver
US20020167949A1 (en) * 1998-02-26 2002-11-14 Gordon Bremer Apparatus and method for asynchronous transfer mode (ATM) adaptive time domain duplex (ATDD) communication
US6643270B1 (en) 1998-03-03 2003-11-04 Vocal Technologies, Ltd Method of compensating for systemic impairments in a telecommunications network
US6163570A (en) 1998-05-11 2000-12-19 Conexant Systems, Inc. Methods and apparatus for verifying transmit power levels in a signal point limited transmission system
US7254167B2 (en) 1998-10-30 2007-08-07 Broadcom Corporation Constellation-multiplexed transmitter and receiver
US6731692B1 (en) * 2000-03-23 2004-05-04 Agere Systems Inc. Symbol encoding and decoding architecture for trellis-coded modulation in gigabit ethernet
WO2002060146A1 (en) 2001-01-26 2002-08-01 Nokia Corporation Method of implementing modulation and modulator
JP3753678B2 (ja) * 2002-06-28 2006-03-08 Ｎｅｃマイクロシステム株式会社 多値画像符号化・復号化装置
US20040096009A1 (en) * 2002-11-14 2004-05-20 Unb Technologies, Inc. Communications methods including narrow band modulation
US20040096010A1 (en) * 2002-11-14 2004-05-20 Unb Technologies Inc. Communications system including a narrow band modulator
US7071849B2 (en) * 2004-04-04 2006-07-04 Guobiao Zhang Fractional-Bit Systems
EP1774655A1 (en) * 2004-07-27 2007-04-18 Koninklijke Philips Electronics N.V. Encoding of data words using three or more signal levels
US7167109B2 (en) * 2005-03-31 2007-01-23 Chenming Hu Hybrid fractional-bit systems
JP4900192B2 (ja) * 2007-10-22 2012-03-21 沖電気工業株式会社 符号分割多重送受信装置及び符号分割多重送受信方法
US9805442B2 (en) * 2012-10-03 2017-10-31 Avago Technologies General Ip (Singapore) Pte. Ltd. Fine-grained bit-rate control
KR102159242B1 (ko) 2014-05-21 2020-09-24 삼성전자주식회사 송신 장치 및 그의 신호 처리 방법
US10727951B2 (en) * 2016-07-20 2020-07-28 Nokia Of America Corporation Low-complexity constellation shaping

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US4622670A (en) * 1984-12-10 1986-11-11 At&T Bell Laboratories Error-correction coding for multilevel transmission system
DE3805169A1 (de) * 1988-02-19 1989-08-31 Inst Rundfunktechnik Gmbh Verfahren zum uebertragen eines digital-codierten tonsignals
US5248641A (en) * 1990-09-17 1993-09-28 Southern Clay Products, Inc. Process for producing bentonite clays exhibiting enhanced solution viscosity properties
US5185763A (en) * 1991-04-09 1993-02-09 Racal-Datacom, Inc. Data bit to constellation symbol mapper
US5119403A (en) * 1991-04-09 1992-06-02 Racal Data Communications Inc. Superframes
US5305352A (en) * 1991-10-31 1994-04-19 At&T Bell Laboratories Coded modulation with unequal error protection
US5329551A (en) * 1992-04-16 1994-07-12 At&T Bell Laboratories Overlapped multilevel codes
JPH06125533A (ja) * 1992-10-13 1994-05-06 Sony Corp エラー訂正コード付加装置及びエラー訂正装置
AU5550694A (en) 1992-11-06 1994-06-08 Pericle Communications Company Adaptive data rate modem
US5486825A (en) * 1994-04-20 1996-01-23 General Datacomm, Inc. Convolutional encoders for modems which implement the "Cole code"

Also Published As

Publication number Publication date
EP0725487A3 (en) 1998-05-13
US5659579A (en) 1997-08-19
EP0725487A2 (en) 1996-08-07
CN1135685A (zh) 1996-11-13
CN1108664C (zh) 2003-05-14
JPH08274822A (ja) 1996-10-18
JP3489705B2 (ja) 2004-01-26
KR960032906A (ko) 1996-09-17
CA2167746C (en) 1999-12-07
KR100383029B1 (ko) 2003-08-14
CA2167746A1 (en) 1996-08-02

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Legal Events

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