BR9815808A - Método e aparelho para a sincronização defrequência fina em sistemas de demodulaçãomulti-portadora - Google Patents

Método e aparelho para a sincronização defrequência fina em sistemas de demodulaçãomulti-portadora

Info

Publication number
BR9815808A
BR9815808A BR9815808-2A BR9815808A BR9815808A BR 9815808 A BR9815808 A BR 9815808A BR 9815808 A BR9815808 A BR 9815808A BR 9815808 A BR9815808 A BR 9815808A
Authority
BR
Brazil
Prior art keywords
frequency
carrier
determined
phase
feedback
Prior art date
Application number
BR9815808-2A
Other languages
English (en)
Other versions
BR9815808B1 (pt
Inventor
Ernst Eberlein
Sabah Badri
Stefan Lipp
Stephan Buchholz
Albert Heuberger
Heinz Gerhouser
Original Assignee
Fraunhofer Ges Forschung
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8166940&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=BR9815808(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fraunhofer Ges Forschung filed Critical Fraunhofer Ges Forschung
Publication of BR9815808A publication Critical patent/BR9815808A/pt
Publication of BR9815808B1 publication Critical patent/BR9815808B1/pt

Links

Classifications

    • 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
    • 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
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2657—Carrier synchronisation
    • H04L27/266—Fine or fractional frequency offset determination and synchronisation
    • 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
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2673—Details of algorithms characterised by synchronisation parameters
    • H04L27/2676—Blind, i.e. without using known symbols
    • H04L27/2679—Decision-aided

Abstract

"MéTODO E APARELHO PARA A SINCRONIZAçãO DEFREQuêNCIA FINA EM SISTEMAS DE DEMODULAçãOMULTI-PORTADORA". Um método e aparelho relacionam-se auma sincronização de freq³ência fina compensando por um desviode freq³ência portadora de uma freq³ência de oscilador em umsistema de demodulação multi-portadora (130) do tipo capaz derealizar uma decodificação de fase diferencial de sinais moduladosmulti-portadora, os sinais compreendendo uma pluralidade desímbolos (200), cada símbolo sendo definido por diferenças defase entre portadoras simultâneas (202) tendo freq³ênciasdiferentes. é determinada uma diferença de fase entre fases damesma portadora (202) em símbolos diferentes (200). A partir daí,determina-se um recuo de freq³ência pela eliminação de incertezasde deslocamento de fase correspondentes a deslocamentos defase codificáveis da diferença de fase. Finalmente, uma correçãode retroalimentação do desvio de freq³ência de portadora éefetuada com base no recuo de freq³ência determinado. De modoalternativo, uma média de recuo de freq³ência pode serdeterminada tirando-se a média de determinados recuos defreq³ência de uma pluralidade de portadoras (202). Então, acorreção de retroalimentação do desvio de freq³ência é efetuadocom base na média do recuo de freq³ência.
BRPI9815808-2A 1998-04-14 1998-04-14 método e aparelho para a sincronização de freqüência fina em sistemas de demodulação multi-portadora. BR9815808B1 (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1998/002184 WO1999053667A1 (en) 1998-04-14 1998-04-14 Method and apparatus for fine frequency synchronization in multi-carrier demodulation systems

Publications (2)

Publication Number Publication Date
BR9815808A true BR9815808A (pt) 2001-12-11
BR9815808B1 BR9815808B1 (pt) 2012-10-30

Family

ID=8166940

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI9815808-2A BR9815808B1 (pt) 1998-04-14 1998-04-14 método e aparelho para a sincronização de freqüência fina em sistemas de demodulação multi-portadora.

Country Status (19)

Country Link
US (1) US7061997B1 (pt)
EP (1) EP1072138B1 (pt)
JP (1) JP3429748B2 (pt)
KR (1) KR100377257B1 (pt)
CN (1) CN1120602C (pt)
AP (1) AP1092A (pt)
AT (1) ATE224119T1 (pt)
AU (1) AU749394B2 (pt)
BR (1) BR9815808B1 (pt)
CA (1) CA2327785C (pt)
DE (1) DE69807945T2 (pt)
DK (1) DK1072138T3 (pt)
EA (1) EA002748B1 (pt)
ES (1) ES2183370T3 (pt)
HK (1) HK1036713A1 (pt)
PT (1) PT1072138E (pt)
TW (1) TW421947B (pt)
WO (1) WO1999053667A1 (pt)
ZA (1) ZA983646B (pt)

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Also Published As

Publication number Publication date
CA2327785C (en) 2003-08-12
ZA983646B (en) 1998-11-24
KR20010042708A (ko) 2001-05-25
EP1072138A1 (en) 2001-01-31
DE69807945D1 (de) 2002-10-17
AU7643298A (en) 1999-11-01
ATE224119T1 (de) 2002-09-15
EA200001068A1 (ru) 2001-06-25
ES2183370T3 (es) 2003-03-16
PT1072138E (pt) 2003-01-31
DE69807945T2 (de) 2003-06-05
CN1301447A (zh) 2001-06-27
AP1092A (en) 2002-08-12
AP2000001927A0 (en) 2000-09-30
DK1072138T3 (da) 2002-12-16
CN1120602C (zh) 2003-09-03
EA002748B1 (ru) 2002-08-29
WO1999053667A1 (en) 1999-10-21
AU749394B2 (en) 2002-06-27
EP1072138B1 (en) 2002-09-11
BR9815808B1 (pt) 2012-10-30
KR100377257B1 (ko) 2003-03-26
JP3429748B2 (ja) 2003-07-22
JP2002511711A (ja) 2002-04-16
CA2327785A1 (en) 1999-10-21
TW421947B (en) 2001-02-11
HK1036713A1 (en) 2002-01-11
US7061997B1 (en) 2006-06-13

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B06A Patent application procedure suspended [chapter 6.1 patent gazette]
B09A Decision: intention to grant [chapter 9.1 patent gazette]
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Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 30/10/2012, OBSERVADAS AS CONDICOES LEGAIS.

B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]

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