ATE253796T1 - Gleichstromunterdrückung für pcm-modems - Google Patents

Gleichstromunterdrückung für pcm-modems

Info

Publication number
ATE253796T1
ATE253796T1 AT98934671T AT98934671T ATE253796T1 AT E253796 T1 ATE253796 T1 AT E253796T1 AT 98934671 T AT98934671 T AT 98934671T AT 98934671 T AT98934671 T AT 98934671T AT E253796 T1 ATE253796 T1 AT E253796T1
Authority
AT
Austria
Prior art keywords
codewords
frame
unsigned
codeword
suppression
Prior art date
Application number
AT98934671T
Other languages
English (en)
Inventor
Andrew L Norrell
Vladimir G Parizhsky
Scott A Lery
Mark A Waldron
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
Application filed by 3Com Corp filed Critical 3Com Corp
Application granted granted Critical
Publication of ATE253796T1 publication Critical patent/ATE253796T1/de

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

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Dc Digital Transmission (AREA)
AT98934671T 1997-06-09 1998-06-05 Gleichstromunterdrückung für pcm-modems ATE253796T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/871,220 US5999109A (en) 1997-06-09 1997-06-09 Frame-based spectral shaping method and apparatus
PCT/US1998/015114 WO1998057468A2 (en) 1997-06-09 1998-06-05 Dc suppression for pcm modems

Publications (1)

Publication Number Publication Date
ATE253796T1 true ATE253796T1 (de) 2003-11-15

Family

ID=25356964

Family Applications (1)

Application Number Title Priority Date Filing Date
AT98934671T ATE253796T1 (de) 1997-06-09 1998-06-05 Gleichstromunterdrückung für pcm-modems

Country Status (8)

Country Link
US (2) US5999109A (de)
EP (1) EP0917789B1 (de)
JP (1) JP3442793B2 (de)
AT (1) ATE253796T1 (de)
AU (1) AU8414898A (de)
CA (2) CA2262998C (de)
DE (1) DE69819449D1 (de)
WO (1) WO1998057468A2 (de)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5999109A (en) * 1997-06-09 1999-12-07 3Com Corporation Frame-based spectral shaping method and apparatus
US6212207B1 (en) * 1997-09-26 2001-04-03 3Com Corporation Robbed bit signal detection and compensation
US6343101B1 (en) * 1998-01-16 2002-01-29 Ess Technology, Inc. Frame-based sign inversion method and system for spectral shaping for pulse-coded-modulation modems
AU6616500A (en) 1999-07-31 2001-03-13 Altocom, Inc. Digital impairment compensation for v.90 modem
US7203248B1 (en) 1999-07-31 2007-04-10 Broadcom Corporation Impairment sensitive selection of constellation points for communication across a channel
US6865239B1 (en) * 1999-07-31 2005-03-08 Altocom, Inc. Deterministic distortion insensitive adaptive receiver using decision updating
US7190727B1 (en) 1999-07-31 2007-03-13 Broadcom Corporation Categorization of impairments affecting a communication channel
EP1219085B1 (de) * 1999-08-31 2010-02-10 Broadcom Corporation Subdimensionale einträgermodulation
US6778611B1 (en) 1999-08-31 2004-08-17 Broadcom Corporation Subdimensional single-carrier modulation
US6496124B1 (en) * 1999-12-09 2002-12-17 Agere Systems Guardian Corp. System and method for compensating for codec DC offset through a DC blocking channel and modem incorporating the same
JP3712631B2 (ja) 2000-06-19 2005-11-02 シャープ株式会社 伝送方法および伝送システム並びに通信装置
US6538586B1 (en) * 2002-01-30 2003-03-25 Intel Corporation Data encoding strategy to reduce selected frequency components in a serial bit stream
US7277491B2 (en) * 2002-05-14 2007-10-02 Ess Technology, Inc. Data access arrangement using a high frequency transformer for electrical isolation
US7926728B2 (en) * 2007-10-31 2011-04-19 Infineon Technologies Ag Integrated circuit device including a contactless integrated circuit inlay
JP5236005B2 (ja) * 2008-10-10 2013-07-17 日本電信電話株式会社 符号化方法、符号化装置、復号方法、復号装置、プログラム及び記録媒体
US9001927B2 (en) 2013-01-31 2015-04-07 Hewlett-Packard Development Company, L.P. Transmitting a wireless signal based on detected signal interference
JP6150245B2 (ja) 2013-03-07 2017-06-21 インターナショナル・ビジネス・マシーンズ・コーポレーションＩｎｔｅｒｎａｔｉｏｎａｌ Ｂｕｓｉｎｅｓｓ Ｍａｃｈｉｎｅｓ Ｃｏｒｐｏｒａｔｉｏｎ 送信装置、受信装置、通信システム、回路装置、通信方法およびプログラム

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0511498B1 (de) * 1991-03-30 1998-12-09 Kabushiki Kaisha Toshiba Kodiereinrichtung für digitale Signale mit verbesserter Kanal-Blockkodierung
JP3613689B2 (ja) * 1993-10-27 2005-01-26 三菱電機株式会社 情報変換装置
JP4291410B2 (ja) * 1994-12-09 2009-07-08 ブレント タウンシェンド、 高速データ転送エンコーダ、デコーダ、システム、エンコード方法および復号方法
US5825824A (en) * 1995-10-05 1998-10-20 Silicon Image, Inc. DC-balanced and transition-controlled encoding method and apparatus
US5943365A (en) * 1996-10-16 1999-08-24 Cirrus Logic, Inc. Device, system, and method for modem communication utilizing DC or near-DC signal suppression
EP1701498B1 (de) * 1997-02-20 2009-04-15 Brent Townshend Schnelles Kommunikationssystem für analoge Teilnehmeranschlüsse
CN1252195A (zh) * 1997-04-08 2000-05-03 摩托罗拉公司 频谱整形传输数据信号的系统和方法
US5999109A (en) * 1997-06-09 1999-12-07 3Com Corporation Frame-based spectral shaping method and apparatus

Also Published As

Publication number Publication date
WO1998057468A3 (en) 1999-03-18
JP2000504549A (ja) 2000-04-11
DE69819449D1 (de) 2003-12-11
CA2425421A1 (en) 1998-12-17
CA2262998C (en) 2004-08-31
AU8414898A (en) 1998-12-30
WO1998057468A2 (en) 1998-12-17
US6255967B1 (en) 2001-07-03
EP0917789A2 (de) 1999-05-26
CA2262998A1 (en) 1998-12-17
EP0917789B1 (de) 2003-11-05
JP3442793B2 (ja) 2003-09-02
US5999109A (en) 1999-12-07

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