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KR950002461A - 심볼 타이밍 복구장치 - Google Patents

심볼 타이밍 복구장치 Download PDF

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Publication number
KR950002461A
KR950002461A KR1019930012085A KR930012085A KR950002461A KR 950002461 A KR950002461 A KR 950002461A KR 1019930012085 A KR1019930012085 A KR 1019930012085A KR 930012085 A KR930012085 A KR 930012085A KR 950002461 A KR950002461 A KR 950002461A
Authority
KR
South Korea
Prior art keywords
output signal
symbol
timing recovery
symbol timing
receiving
Prior art date
Application number
KR1019930012085A
Other languages
English (en)
Other versions
KR0148140B1 (ko
Inventor
한동석
Original Assignee
김광호
삼성전자 주식회사
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 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019930012085A priority Critical patent/KR0148140B1/ko
Priority to US08/268,460 priority patent/US6243431B1/en
Publication of KR950002461A publication Critical patent/KR950002461A/ko
Application granted granted Critical
Publication of KR0148140B1 publication Critical patent/KR0148140B1/ko

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Classifications

    • 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
    • H04L7/0272—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 with squaring loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/12—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal
    • 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
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/455—Demodulation-circuits
    • 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)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

본 발명은 전 디지탈 고화질 텔레비젼 등의 고속 데이타 전송시스템의 수신측에서 수신된 신호를 소정의 심볼레이트로 샘플링하는데 필요한 심볼타이밍을 복구하는 장치에 관한 것으로, 수신된 신호에서 심볼 타이밍 복구에 필요한 신호성분을 일차적으로 찾아내기 위한 전처리필터와, DC성분과 주파수성분이 심볼레이트인 정현파를 얻기 위한 제곱연산부와, 중심주파수가 심볼레이트와 일치하는 협대역필터와, 필터링된 신호에서 PGZP의 평균값을 산출하는 수단과, 이 산출된 평균값을 이용하여 샘플링클럭을 발생하는 수단을 구비함으로써, 보다 신속하게 정확하게 심볼타이밍을 복구할 수 있다.

Description

심볼 타이밍 복구장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제 1도는 본 발명에 의한 심볼 타이밍 복구장치의 일 실시예를 나타내는 블럭도, 제2도는 제1도의 장치의 일부에 대한 동작 파형도.

Claims (6)

  1. 고속데이타전송시스템의 수신측에서 수신된 신호를 소정의 심볼레이트로 샘플링하는데 필요한 심볼 타이밍을 복구하기 위한 심볼타이밍복구 장치에 있어서, 상기 샘플링된 신호를 공급받아, 소정의 중심주파수를 갖는 협대역으로 필터링하는 전처리필터수단; 상기 전처리필터수단의 출력신호를 공급받아, 제곱연산을 수행하는 제곱연산수단; 상기 제곱연산수단의 출력신호를 공급받아 , 중심주파수가 심볼레이트(fS)인 협대역으로 필터링하는 협대역필터; 상기 렵대역필터의 출력신호를 공급받아, 다수의 PGZP의 평균을 산출하는 평균 PGZP 검출수단; 및 평균 PGZP검출수단의 출력신호를 공급받아, 상기 샘플링에 필요한 샘플링클럭을 발생하는 클럭발생수단을 포함하는 것을 특징으로하는 심볼 타이밍 복구장치.
  2. 제1항에 있어서, 상기 전처리필터수단의 중심주파수는 심볼레이트(fs)의 "1/2"과 일치하는 것을 특징으로 하는 심볼 타이밍 복구장치.
  3. 제1항에 있어서, 상기 전처리필터수단은 상기 샘플링된 신호 중 I-채널신호를 공급받아, 중심주파수가 심볼레이트(fs)의 "1/2"인 협대역으로 필터링하는 제1전처리필터; 및 상기 샘플링된 신호 중 Q- 채널신호를 공급받아, 중신주파수가 심볼레이트(fs)의 "1/2"인 협대역으로 필터링하는 제2전처리필터를 포함하는 것을 특징으로 하는 심볼 타이밍 복구장치.
  4. 제3항에 있어서, 상기 제곱연산수단은, 상기 제1전처리필터의 출력신호를 제곱연산하는 제1제곱연산부; 및 상기 제2전처리필터의 출력신호를 제곱연산하는 제2제곱연산부를 포함하는 것을 특징으로 하는 심볼 타이밍 복구장치.
  5. 제4항에 있어서, 상기 심볼타이밍복구장치는 상기 제1제곱연사부의 출력신호와 상기 제2제곱연사부의 출력신호를 가산하여 상기 협대역필터로 공급하는 가산기를 추가로 포함하는 것을 특징으로 하는 심볼 타이밍 복구장치.
  6. 제1항에 있어서, 상기 클럭발생부는 상기 평균 PGZP검출부의 출력신호를 공급받아, 상기 심볼레이트(fs)의 4배(4fs) 이상의 레이트를 갖는 클럭을 발생하는 것을 특징으로하는 심볼 타이밍 복구장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019930012085A 1993-06-30 1993-06-30 심볼 타이밍 복구장치 KR0148140B1 (ko)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1019930012085A KR0148140B1 (ko) 1993-06-30 1993-06-30 심볼 타이밍 복구장치
US08/268,460 US6243431B1 (en) 1993-06-30 1994-06-30 Symbol timing recovery apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930012085A KR0148140B1 (ko) 1993-06-30 1993-06-30 심볼 타이밍 복구장치

Publications (2)

Publication Number Publication Date
KR950002461A true KR950002461A (ko) 1995-01-04
KR0148140B1 KR0148140B1 (ko) 1998-09-15

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US (1) US6243431B1 (ko)
KR (1) KR0148140B1 (ko)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100396672B1 (ko) * 2001-09-25 2003-09-02 엘지전자 주식회사 디지털 ｔｖ 수신기
KR100413412B1 (ko) * 1997-04-25 2004-04-14 엘지전자 주식회사 디지탈 잔류측파대(vsb) 복조장치
KR100413413B1 (ko) * 1997-05-02 2004-04-14 엘지전자 주식회사 디지털 잔류측파대(vsb) 복조장치
KR100459112B1 (ko) * 1997-12-27 2005-09-30 엘지전자 주식회사 심볼 타이밍 복구장치 및 방법
KR101203066B1 (ko) * 2005-06-30 2012-11-21 엘지전자 주식회사 식기세척기의 세제투입장치

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6081822A (en) * 1998-03-11 2000-06-27 Agilent Technologies, Inc. Approximating signal power and noise power in a system
KR100603606B1 (ko) * 2000-12-26 2006-07-24 한국전자통신연구원 최소 대역폭 시스템의 클럭 복구 장치 및 그 방법
KR100466589B1 (ko) * 2002-02-18 2005-01-24 한국전자통신연구원 디지털 심볼 동기 장치 및 그 방법
KR100937404B1 (ko) * 2002-07-13 2010-01-18 엘지전자 주식회사 타이밍 복원 장치
KR20040006661A (ko) * 2002-07-13 2004-01-24 엘지전자 주식회사 타이밍 복원 장치
JP4312129B2 (ja) * 2004-08-31 2009-08-12 株式会社ケンウッド シンボルクロック再生装置、シンボルクロック再生プログラム、及びシンボルクロック再生方法
US20080309829A1 (en) * 2007-06-14 2008-12-18 Koninklijke Philips Electronics, N.V. Frequency selective radio sensor and a method thereof
US8306171B2 (en) * 2009-04-15 2012-11-06 General Electric Company Method and system for bit detection and synchronization
US8489662B2 (en) * 2010-03-05 2013-07-16 The Aerospace Corporation Systems and methods for sliding convolution interpolating filters
US8855254B2 (en) * 2010-03-05 2014-10-07 The Aerospace Corporation Systems and methods for pre-averaged staggered convolution decimating filters

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GB2026796B (en) * 1978-07-14 1982-09-29 Fujitsu Ltd Clock synchronization circuit
US4808937A (en) * 1986-07-15 1989-02-28 Hayes Microcomputer Products, Inc. Phase-locked loop for a modem
US5040194A (en) * 1986-07-15 1991-08-13 Hayes Microcomputer Products, Inc. Method and apparatus for providing for automatic gain control of incoming signals in a modem
US4910474A (en) * 1986-07-15 1990-03-20 Hayes Microcomputer Products, Inc. Method and apparatus for generating phase and amplitude modulated signals
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US5311178A (en) * 1992-08-14 1994-05-10 Silicon Systems, Inc. Method for processing sample values in an RLL channel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100413412B1 (ko) * 1997-04-25 2004-04-14 엘지전자 주식회사 디지탈 잔류측파대(vsb) 복조장치
KR100413413B1 (ko) * 1997-05-02 2004-04-14 엘지전자 주식회사 디지털 잔류측파대(vsb) 복조장치
KR100459112B1 (ko) * 1997-12-27 2005-09-30 엘지전자 주식회사 심볼 타이밍 복구장치 및 방법
KR100396672B1 (ko) * 2001-09-25 2003-09-02 엘지전자 주식회사 디지털 ｔｖ 수신기
KR101203066B1 (ko) * 2005-06-30 2012-11-21 엘지전자 주식회사 식기세척기의 세제투입장치

Also Published As

Publication number Publication date
KR0148140B1 (ko) 1998-09-15
US6243431B1 (en) 2001-06-05

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