BR9914950A - Processo para a equalização, sobretudo para espécies de modulação offset - Google Patents

Processo para a equalização, sobretudo para espécies de modulação offset

Info

Publication number
BR9914950A
BR9914950A BR9914950-8A BR9914950A BR9914950A BR 9914950 A BR9914950 A BR 9914950A BR 9914950 A BR9914950 A BR 9914950A BR 9914950 A BR9914950 A BR 9914950A
Authority
BR
Brazil
Prior art keywords
value
reception signal
error
offset modulation
dfe
Prior art date
Application number
BR9914950-8A
Other languages
English (en)
Inventor
James Aldis
Original Assignee
Ascom Powerline Comm Ag
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 Ascom Powerline Comm Ag filed Critical Ascom Powerline Comm Ag
Publication of BR9914950A publication Critical patent/BR9914950A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/01—Equalisers
    • 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
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03114—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals
    • H04L25/03146—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals with a recursive structure

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)

Abstract

Patente de Invenção: "PROCESSO PARA A EQUALIZAçãO, SOBRETUDO PARA ESPéCIES DE MODULAçãO OFFSET". A invenção descreve um método para a equalização de um sinal de recepção em um receptor digital com a ajuda de uma estrutura-DFB (Decision Feedback Equalizer). O sinal de recepção é baseado em uma constelação de sinais unidimensional ou em uma constelação de sinais transformável nesta (por exemplo, BPSK, GMSK, OQPSK). Os coeficientes do DFE são estabelecidos de tal modo, que o valor esperado do quadrado da parte real do erro do sinal de recepção é minimizado. Como diferença ao atual estado tecnológico portanto não é empregado o erro do valor complexo como base para a otimização. O cálculo é muito mais limitado ao valor real. Os coeficientes de filtro também podem ter um valor real em lugar de um valor complexo. O aspecto fundamental da invenção reside no fato de que é possível melhorar o desempenho da estrutura DFE de uma forma simples, mesmo a complexidade de cálculo pode ser reduzida comparado com o atual estado tecnológico.
BR9914950-8A 1998-10-30 1999-10-29 Processo para a equalização, sobretudo para espécies de modulação offset BR9914950A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP98811090A EP0998083A1 (de) 1998-10-30 1998-10-30 Verfahren zum Entzerren, insbesondere für Offset-Modulationsarten
PCT/CH1999/000509 WO2000027083A1 (de) 1998-10-30 1999-10-29 Verfahren zum entzerren, insbesondere für offset-modulationsarten

Publications (1)

Publication Number Publication Date
BR9914950A true BR9914950A (pt) 2001-11-06

Family

ID=8236418

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9914950-8A BR9914950A (pt) 1998-10-30 1999-10-29 Processo para a equalização, sobretudo para espécies de modulação offset

Country Status (12)

Country Link
EP (2) EP0998083A1 (pt)
JP (1) JP2002529964A (pt)
KR (1) KR20010089314A (pt)
CN (1) CN1144430C (pt)
AU (1) AU6322599A (pt)
BR (1) BR9914950A (pt)
CA (1) CA2347747A1 (pt)
HK (1) HK1040025A1 (pt)
ID (1) ID29202A (pt)
IL (1) IL142795A0 (pt)
NO (1) NO20012104L (pt)
WO (1) WO2000027083A1 (pt)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009079815A1 (fr) * 2007-12-10 2009-07-02 Zte Corporation Procédé pour optimiser la performance radiofréquence du terminal

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0614627B2 (ja) * 1985-06-04 1994-02-23 富士通株式会社 モデムのトレーニング方法
AU7439596A (en) * 1996-10-10 1998-05-05 Statistical Signal Processing, Inc. Signal processing apparatus employing the spectral property of the signal

Also Published As

Publication number Publication date
KR20010089314A (ko) 2001-09-29
IL142795A0 (en) 2002-03-10
NO20012104D0 (no) 2001-04-27
EP0998083A1 (de) 2000-05-03
JP2002529964A (ja) 2002-09-10
EP1125404A1 (de) 2001-08-22
CN1325580A (zh) 2001-12-05
WO2000027083A1 (de) 2000-05-11
CA2347747A1 (en) 2000-05-11
AU6322599A (en) 2000-05-22
HK1040025A1 (zh) 2002-05-17
NO20012104L (no) 2001-04-27
ID29202A (id) 2001-08-09
CN1144430C (zh) 2004-03-31

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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 5A, 6A, 7A E 8A ANUIDADES.

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 1913 DE 04/09/2007.