BR0307918A - Recuperação de portadora para receptores dtv - Google Patents

Recuperação de portadora para receptores dtv

Info

Publication number
BR0307918A
BR0307918A BR0307918-0A BR0307918A BR0307918A BR 0307918 A BR0307918 A BR 0307918A BR 0307918 A BR0307918 A BR 0307918A BR 0307918 A BR0307918 A BR 0307918A
Authority
BR
Brazil
Prior art keywords
carrier recovery
signal
frequency
dtv receivers
phase
Prior art date
Application number
BR0307918-0A
Other languages
English (en)
Inventor
Jingsong Xia
Richard W Citta
Scott M Lopresto
Wenjun Zhang
Original Assignee
Micronas Semiconductors Inc
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 Micronas Semiconductors Inc filed Critical Micronas Semiconductors Inc
Publication of BR0307918A publication Critical patent/BR0307918A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/06—Demodulator circuits; Receiver circuits
    • H04L27/066—Carrier recovery circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0053—Closed loops
    • H04L2027/0057—Closed loops quadrature phase
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
    • H04L7/027—Speed or phase control by the received code signals, the signals containing no special synchronisation information extracting the synchronising or clock signal from the received signal spectrum, e.g. by using a resonant or bandpass circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

"RECUPERAçãO DE PORTADORA PARA RECEPTORES DTV". Um sistema (200) e método para recuperação de portadora independente de um sinal piloto utiliza a informação de freq³ência e fase nas bordas (d) de banda superior e inferior de um sinal (100) para gerar um sinal para corrigir (299) a freq³ência e fase do oscilador (210) local. Uma combinação específica de filtros (220, 230) de co-seno elevado à potência, filtros (248, 268, 297) de banda baixa, multiplicadores (202, 204, 222, 224, 232, 234, 280, 285, 290), e somadores (240, 250, 260, 270, 295), utiliza eficazmente os dados finais (d) de um sinal recebido (201) no domínio de freq³ência para corrigir erros de fase.
BR0307918-0A 2002-04-04 2003-04-04 Recuperação de portadora para receptores dtv BR0307918A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US36971602P 2002-04-04 2002-04-04
PCT/US2003/010402 WO2003085852A1 (en) 2002-04-04 2003-04-04 Carrier recovery for dtv receivers

Publications (1)

Publication Number Publication Date
BR0307918A true BR0307918A (pt) 2005-01-11

Family

ID=28791988

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0307918-0A BR0307918A (pt) 2002-04-04 2003-04-04 Recuperação de portadora para receptores dtv

Country Status (5)

Country Link
KR (1) KR20050007439A (pt)
CN (1) CN100592644C (pt)
AU (1) AU2003221810A1 (pt)
BR (1) BR0307918A (pt)
WO (1) WO2003085852A1 (pt)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6044083A (en) * 1995-10-20 2000-03-28 Zenith Electronics Corporation Synchronous code division multiple access communication system
US6005640A (en) * 1996-09-27 1999-12-21 Sarnoff Corporation Multiple modulation format television signal receiver system

Also Published As

Publication number Publication date
WO2003085852A1 (en) 2003-10-16
KR20050007439A (ko) 2005-01-18
AU2003221810A1 (en) 2003-10-20
CN100592644C (zh) 2010-02-24
CN1650529A (zh) 2005-08-03

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Legal Events

Date Code Title Description
B08F Application fees: application dismissed [chapter 8.6 patent gazette]

Free format text: REFERENTE A 5A E 6A 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 DA RPI 2012 DE 28/07/2009.