BR0011341A - Processo e dispositivo em um sistema de transmissão de tons múltiplos - Google Patents

Processo e dispositivo em um sistema de transmissão de tons múltiplos

Info

Publication number
BR0011341A
BR0011341A BR0011341-7A BR0011341A BR0011341A BR 0011341 A BR0011341 A BR 0011341A BR 0011341 A BR0011341 A BR 0011341A BR 0011341 A BR0011341 A BR 0011341A
Authority
BR
Brazil
Prior art keywords
analog
signal
digital
subband
transmission system
Prior art date
Application number
BR0011341-7A
Other languages
English (en)
Inventor
Bostrom Jan
Magnus Svevar
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of BR0011341A publication Critical patent/BR0011341A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0002—Modulated-carrier systems analog front ends; means for connecting modulators, demodulators or transceivers to a transmission line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/2637—Modulators with direct modulation of individual subcarriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

"PROCESSO E DISPOSITIVO EM UM SISTEMA DE TRANSMISSãO DE TONS MúLTIPLOS". Processo em um sistema de transmissão de tons múltiplos no qual uma faixa de freq³ência utilizável de um canal é separada em uma pluralidade de faixas de freq³ência, um sinal analógico em cada sub-banda sendo filtrado por meio de uma pluralidade de filtros passa banda no lado de recepção. O processo compreende as etapas de converter separadamente o sinal analógico em cada sub-banda para um sinal digital em uma pluralidade de conversores analógico-digitais (11), cada conversor analógico-digital sendo associado a uma sub-banda, e ativando e desativando cada conversor analógico-digital na dependência da presença de um sinal na sub-banda associada. Uma pluralidade de filtros passa banda (10) é conectada operacionalmente a uma linha analógica (12) em um lado de recepção. Cada filtro passa banda é conectado operacionalmente a um conversor analógico digital (11) para converter um sinal do canal lógico em um sinal digital. Uma unidade de controle (13) é conectada operacionalmente a cada um de ditos conversores analógico-digital (11) para ativar e desativar cada conversor.
BR0011341-7A 1999-06-04 2000-06-02 Processo e dispositivo em um sistema de transmissão de tons múltiplos BR0011341A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9902077A SE521513C2 (sv) 1999-06-04 1999-06-04 Förfarande och anordning i ett flertonstransmissionssystem
PCT/SE2000/001145 WO2000076115A1 (en) 1999-06-04 2000-06-02 Method and device in a multi-tone transmission system

Publications (1)

Publication Number Publication Date
BR0011341A true BR0011341A (pt) 2002-03-05

Family

ID=20415906

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0011341-7A BR0011341A (pt) 1999-06-04 2000-06-02 Processo e dispositivo em um sistema de transmissão de tons múltiplos

Country Status (8)

Country Link
US (1) US20020064235A1 (pt)
EP (1) EP1183815B1 (pt)
CN (1) CN1214558C (pt)
AU (1) AU5436100A (pt)
BR (1) BR0011341A (pt)
DE (1) DE60030110T2 (pt)
SE (1) SE521513C2 (pt)
WO (1) WO2000076115A1 (pt)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7665008B2 (en) 2004-01-12 2010-02-16 Intel Corporation Method and apparatus for implementing a low density parity check code in a wireless system
US7345989B2 (en) * 2004-01-12 2008-03-18 Intel Corporation Adaptive channelization scheme for high throughput multicarrier systems
JP2008521014A (ja) * 2004-11-18 2008-06-19 レクロイ コーポレーション 高帯域幅オシロスコープ
US8837633B2 (en) * 2011-10-21 2014-09-16 Xilinx, Inc. Systems and methods for digital processing based on active signal channels of a communication system
US11658671B2 (en) * 2021-09-22 2023-05-23 Apple Inc. Latency reduction in analog-to-digital converter-based receiver circuits

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8203599A (nl) * 1982-09-17 1984-04-16 Philips Nv Hoofdeinde en ontvanger voor een signaaldistributiesysteem.
DE217953T1 (de) * 1984-07-20 1987-09-03 Yokogawa Medical Systems, Ltd., Tachikawa, Tokio/Tokyo Analysevorrichtung fuer dopplersignal.
FR2667466A1 (fr) * 1990-10-02 1992-04-03 Europ Agence Spatiale Demodulateur multiporteuses.
US5323391A (en) * 1992-10-26 1994-06-21 Motorola, Inc. Multi-channel digital transmitter and receiver
US5627863A (en) * 1994-07-15 1997-05-06 Amati Communications Corporation Frame synchronization in multicarrier transmission systems
US6493395B1 (en) * 1996-09-02 2002-12-10 Stmicroelectronics N.V. Multi-carrier transmission systems
US5784339A (en) * 1997-04-16 1998-07-21 Ocean Vision Technology, Inc. Underwater location and communication system
GB2326070B (en) * 1997-05-02 2002-04-24 Lsi Logic Corp Demoulding digital video broadcast siginals
US6252900B1 (en) * 1997-06-30 2001-06-26 Integrated Telecom Express, Inc. Forward compatible and expandable high speed communications system and method of operation
US6678312B1 (en) * 1999-12-22 2004-01-13 Koninklijke Philips Electronics N.V. Method for extending digital receiver sensitivity using analog correlation

Also Published As

Publication number Publication date
AU5436100A (en) 2000-12-28
CN1214558C (zh) 2005-08-10
DE60030110D1 (de) 2006-09-28
SE521513C2 (sv) 2003-11-11
WO2000076115A1 (en) 2000-12-14
CN1353896A (zh) 2002-06-12
SE9902077D0 (sv) 1999-06-04
DE60030110T2 (de) 2007-07-05
SE9902077L (sv) 2000-12-05
EP1183815A1 (en) 2002-03-06
EP1183815B1 (en) 2006-08-16
US20020064235A1 (en) 2002-05-30

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Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A(S) 10A E 11A ANUIDADE(S).

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2112 DE 28/06/2011.