DE69127544D1 - System zur kodierten quadraturamplitudenmodulation - Google Patents

System zur kodierten quadraturamplitudenmodulation

Info

Publication number
DE69127544D1
DE69127544D1 DE69127544T DE69127544T DE69127544D1 DE 69127544 D1 DE69127544 D1 DE 69127544D1 DE 69127544 T DE69127544 T DE 69127544T DE 69127544 T DE69127544 T DE 69127544T DE 69127544 D1 DE69127544 D1 DE 69127544D1
Authority
DE
Germany
Prior art keywords
amplitude modulation
square amplitude
coded square
coded
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 - Lifetime
Application number
DE69127544T
Other languages
English (en)
Other versions
DE69127544T2 (de
Inventor
Richard Williams
John Brownlie
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.)
British Telecommunications PLC
Original Assignee
British Telecommunications PLC
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 British Telecommunications PLC filed Critical British Telecommunications PLC
Application granted granted Critical
Publication of DE69127544D1 publication Critical patent/DE69127544D1/de
Publication of DE69127544T2 publication Critical patent/DE69127544T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04L27/3416—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes
    • H04L27/3427—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes in which the constellation is the n - fold Cartesian product of a single underlying two-dimensional constellation
    • H04L27/3438—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes in which the constellation is the n - fold Cartesian product of a single underlying two-dimensional constellation using an underlying generalised cross constellation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Error Detection And Correction (AREA)
  • Amplifiers (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
DE69127544T 1990-07-26 1991-07-26 System zur kodierten quadraturamplitudenmodulation Expired - Lifetime DE69127544T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909016420A GB9016420D0 (en) 1990-07-26 1990-07-26 Block coded modulation
PCT/GB1991/001259 WO1992002092A1 (en) 1990-07-26 1991-07-26 Coded qam system

Publications (2)

Publication Number Publication Date
DE69127544D1 true DE69127544D1 (de) 1997-10-09
DE69127544T2 DE69127544T2 (de) 1998-02-05

Family

ID=10679692

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69127544T Expired - Lifetime DE69127544T2 (de) 1990-07-26 1991-07-26 System zur kodierten quadraturamplitudenmodulation

Country Status (9)

Country Link
US (1) US5448592A (de)
EP (1) EP0540636B1 (de)
JP (1) JP3242914B2 (de)
AU (1) AU656908B2 (de)
CA (1) CA2088062C (de)
DE (1) DE69127544T2 (de)
GB (2) GB9016420D0 (de)
HK (2) HK133796A (de)
WO (1) WO1992002092A1 (de)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5329551A (en) * 1992-04-16 1994-07-12 At&T Bell Laboratories Overlapped multilevel codes
JP2818534B2 (ja) * 1993-09-28 1998-10-30 日本電気株式会社 符号化変調方式
US5666468A (en) * 1994-12-02 1997-09-09 Grumman Corporation Neural network binary code recognizer
DE19528795A1 (de) * 1995-08-04 1997-02-06 Daimler Benz Aerospace Ag Verfahren zur Übertragung von diskreten Nachrichtensignalen
US5907581A (en) * 1996-09-27 1999-05-25 International Business Machines Corporation Two-dimensional low-pass filtering code apparatus and method
EP0849955A3 (de) * 1996-12-17 2000-05-03 Lg Electronics Inc. Verfahren und Vorrichtung zur Erzeugung eines FBAS-Signals mit digitaler QAM
EP0896458B1 (de) * 1997-08-05 2003-04-09 Sony International (Europe) GmbH Schaltung zur Rückbildung von QAM-Symbolen
WO1999030442A1 (fr) 1997-12-10 1999-06-17 Mitsubishi Denki Kabushiki Kaisha Systeme de communication mobile
US6031474A (en) * 1998-03-10 2000-02-29 Kay; Stanley E. Half rate coded modulation schemes for Rayleigh fading channels
US6148428A (en) 1998-05-21 2000-11-14 Calimetrics, Inc. Method and apparatus for modulation encoding data for storage on a multi-level optical recording medium
US6947500B1 (en) * 1999-01-29 2005-09-20 Northrop Grumman Corporation Buffering and sequencing of soft decisions of multiple channels into a single shared biorthogonal decoder
US6947179B2 (en) * 2000-12-28 2005-09-20 Pitney Bowes Inc. Method for determining the information capacity of a paper channel and for designing or selecting a set of bitmaps representative of symbols to be printed on said channel
US6986094B2 (en) * 2001-03-29 2006-01-10 Intel Corporation Device and method for selecting opcode values with maximum hamming distance to minimize latency and buffering requirements
US6973579B2 (en) 2002-05-07 2005-12-06 Interdigital Technology Corporation Generation of user equipment identification specific scrambling code for the high speed shared control channel
US6959411B2 (en) * 2002-06-21 2005-10-25 Mediatek Inc. Intelligent error checking method and mechanism
US7356088B2 (en) * 2004-04-29 2008-04-08 Texas Instruments Incorporated M-dimension M-PAM trellis code system and associated trellis encoder and decoder
JP4260688B2 (ja) * 2004-06-09 2009-04-30 富士通株式会社 データ送信装置、データ送受信システム、データ送信装置の制御方法およびデータ送受信システムの制御方法
US8369449B2 (en) * 2005-09-20 2013-02-05 Koninklijke Philips Electronics N.V. Method and system of diversity transmission of data employing M-point QAM modulation
US7986441B2 (en) * 2007-04-04 2011-07-26 Wong Technologies L.L.C. Embedding watermark into halftone image with low distortion using parity values for overlapping groups of candidate sites
US10361721B1 (en) 2014-05-01 2019-07-23 Marvell International Ltd. Methods and network device for uncoded bit protection in 10GBASE-T Ethernet

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955141A (en) * 1974-10-18 1976-05-04 Intertel, Inc. Synchronizing circuit for modems in a data communications network
US4597090A (en) * 1983-04-14 1986-06-24 Codex Corporation Block coded modulation system
US4586182A (en) * 1984-02-06 1986-04-29 Codex Corporation Source coded modulation system
US4683578A (en) * 1985-07-05 1987-07-28 Paradyne Corporation Automatic gain control using the extreme points of a constellation
US4721928A (en) * 1985-11-21 1988-01-26 Nec Corporation Multilevel modulator capable of producing a multilevel quadrature amplitude modulated signal having (2n +α) output signal points
US4882733A (en) * 1987-03-13 1989-11-21 Ford Aerospace Corporation Method and apparatus for combining encoding and modulation
JPH061908B2 (ja) * 1988-02-02 1994-01-05 郵政省通信総合研究所長 伝送路歪補償方式
US5022053A (en) * 1989-04-10 1991-06-04 At&T Bell Laboratories Data communications with alternation of signaling constellations
DE68915758T2 (de) * 1989-07-07 1994-12-08 Ibm Blockkodierungsschema für die Übertragung von partiellen Bits.

Also Published As

Publication number Publication date
AU656908B2 (en) 1995-02-23
JP3242914B2 (ja) 2001-12-25
GB2263213A (en) 1993-07-14
GB9302389D0 (en) 1993-05-05
CA2088062C (en) 1998-12-29
EP0540636B1 (de) 1997-09-03
DE69127544T2 (de) 1998-02-05
HK133796A (en) 1996-08-02
EP0540636A1 (de) 1993-05-12
WO1992002092A1 (en) 1992-02-06
JPH06501348A (ja) 1994-02-10
HK1002843A1 (en) 1998-09-18
AU8305891A (en) 1992-02-18
GB2263213B (en) 1994-10-26
US5448592A (en) 1995-09-05
GB9016420D0 (en) 1990-09-12
CA2088062A1 (en) 1992-01-27

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