AU6345198A - Signalling method using multiple modulus conversion and shell mapping - Google Patents

Signalling method using multiple modulus conversion and shell mapping

Info

Publication number
AU6345198A
AU6345198A AU63451/98A AU6345198A AU6345198A AU 6345198 A AU6345198 A AU 6345198A AU 63451/98 A AU63451/98 A AU 63451/98A AU 6345198 A AU6345198 A AU 6345198A AU 6345198 A AU6345198 A AU 6345198A
Authority
AU
Australia
Prior art keywords
modulus conversion
signalling method
multiple modulus
shell mapping
mapping
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.)
Abandoned
Application number
AU63451/98A
Inventor
Scott A. Lery
Andy L. Norell
Richard G. C. Williams
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.)
3Com Corp
Original Assignee
3Com 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
Priority claimed from US08/888,201 external-priority patent/US5995548A/en
Priority claimed from US08/944,461 external-priority patent/US6084883A/en
Application filed by 3Com Corp filed Critical 3Com Corp
Publication of AU6345198A publication Critical patent/AU6345198A/en
Abandoned legal-status Critical Current

Links

Classifications

    • 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
    • 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)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
AU63451/98A 1997-03-03 1998-03-03 Signalling method using multiple modulus conversion and shell mapping Abandoned AU6345198A (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US3812397P 1997-03-03 1997-03-03
US60038123 1997-03-03
US08/888,201 US5995548A (en) 1996-11-15 1997-07-07 Signaling method using multiple modulus shell mapping
US08888201 1997-07-07
US08/944,461 US6084883A (en) 1997-07-07 1997-10-06 Efficient data transmission over digital telephone networks using multiple modulus conversion
US08944461 1997-10-06
PCT/US1998/004087 WO1998039883A1 (en) 1997-03-03 1998-03-03 Signalling method using multiple modulus conversion and shell mapping

Publications (1)

Publication Number Publication Date
AU6345198A true AU6345198A (en) 1998-09-22

Family

ID=27365341

Family Applications (1)

Application Number Title Priority Date Filing Date
AU63451/98A Abandoned AU6345198A (en) 1997-03-03 1998-03-03 Signalling method using multiple modulus conversion and shell mapping

Country Status (2)

Country Link
AU (1) AU6345198A (en)
WO (1) WO1998039883A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5970100A (en) * 1996-11-15 1999-10-19 Conexant Systems, Inc. System for controlling and shaping the spectrum and redundancy of signal-point limited transmission
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
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
US6065030A (en) * 1998-03-30 2000-05-16 Conexant Systems, Inc. Method and apparatus for implementing short-word division techniques in a multiple modulus conversion context
WO2003017500A1 (en) * 2001-08-17 2003-02-27 The National University Of Singapore Coded modulation scheme for a wireless communication system and methods thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5113412A (en) * 1990-06-08 1992-05-12 General Datacomm, Inc. Method and apparatus for mapping an eight dimensional constellation of a convolutionally coded communication system
US5103227A (en) * 1990-09-26 1992-04-07 At&T Bell Laboratories Modulus converter for fractional rate encoding
US5623516A (en) * 1991-03-28 1997-04-22 British Telecommunications Public Limited Company Frame synchronization for QAM
CA2124376A1 (en) * 1993-07-16 1995-01-17 William Lewis Betts Method and apparatus for encoding data for transfer over a communication channel
US5428641A (en) * 1993-07-23 1995-06-27 Motorola, Inc. Device and method for utilizing zero-padding constellation switching with frame mapping
US5598435A (en) * 1993-12-23 1997-01-28 British Telecommunications Public Limited Company Digital modulation using QAM with multiple signal point constellations not equal to a power of two
DE69532919T2 (en) * 1994-12-09 2005-04-14 Townshend, Brent, Menlo Park FAST ARRANGEMENT SYSTEM FOR ANALOG PARTICIPANT CONNECTIONS
US5659579A (en) * 1995-02-01 1997-08-19 Lucent Technologies Inc. Multilevel coding for fractional bits
US5812075A (en) * 1996-08-23 1998-09-22 Paradyne Corporation Combined DAQ/RBS compensation system and method for enhancing the accuracy of digital data communicated through a network

Also Published As

Publication number Publication date
WO1998039883A1 (en) 1998-09-11

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