KR100610564B1 - 디지털 신호 동조 시스템 - Google Patents
디지털 신호 동조 시스템 Download PDFInfo
- Publication number
- KR100610564B1 KR100610564B1 KR1020007010591A KR20007010591A KR100610564B1 KR 100610564 B1 KR100610564 B1 KR 100610564B1 KR 1020007010591 A KR1020007010591 A KR 1020007010591A KR 20007010591 A KR20007010591 A KR 20007010591A KR 100610564 B1 KR100610564 B1 KR 100610564B1
- Authority
- KR
- South Korea
- Prior art keywords
- signal
- frequency
- digital
- lock
- offset
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
- H03J1/02—Indicating arrangements
- H03J1/04—Indicating arrangements with optical indicating means
- H03J1/045—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like
- H03J1/047—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like using electronic means, e.g. LED's
- H03J1/048—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like using electronic means, e.g. LED's with digital indication
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
- H03J7/02—Automatic frequency control
- H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
- H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
- H03J1/0041—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor for frequency synthesis with counters or frequency dividers
- H03J1/005—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor for frequency synthesis with counters or frequency dividers in a loop
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
- H03J1/06—Driving or adjusting arrangements; combined with other driving or adjusting arrangements, e.g. of gain control
- H03J1/14—Special arrangements for fine and coarse tuning
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
- H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
- H03J5/0272—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Circuits Of Receivers In General (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Superheterodyne Receivers (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
Description
본 발명이 특정 실시예에 대해 설명되었을지라도, 본 발명의 범주 내에서 변형이 이루어질 수 있음이 인식될 것이다. 예컨대, 주파수 대역에서 가장 낮은 주파수로부터 탐색을 시작하고 각 단계에서 주파수를 증가시키는 것이 유리할 수 있는 다른 실시예를 생각해 볼 수 있다. 예컨대, 다양한 형태의 산술 계산이 디지털 신호 처리에서 구현될 수도 있는데, 그 중의 하나는 위에서 상술된 2의 보수이다. 이러한 다른 형태의 산술 계산은 상술된 것과는 다른 형태의 산술 바이어스를 발생시킬 수도 있고, 그에 따라 대역 내에서 가장 높은 주파수로부터 보다는 가장 낮은 주파수로부터 탐색하는 것이 바람직하게 할 수도 있다.
Claims (3)
- 위성 신호 수신기에서 허용된 LNB 주파수 드리프트 범위를 나타내는 디지털 신호 동조 시스템에 있어서,디지털 정보를 가지고 있는(bear) RF 신호에 동조시키기 위한 국부 발진기(911)를 포함하는 동조기(9)와;상기 동조기(9)에 의해 수신된 상기 RF 신호를 복조하기 위해 반송파 추적 루프(carrier track loop)(1111)를 구비하는 디지털 복조기(11)로서, 상기 반송파 추적 루프(1111)는 상기 RF 신호의 주파수와 공칭 RF 주파수 사이의 주파수 오프셋을 나타내는 제어 신호를 발생시키는, 디지털 복조기(11)와;상기 제어 신호에 응답하여 상기 국부 발진기(911)의 주파수를 조정하기 위한 조정 수단(19,921,923,925)과;상기 국부 발진기(911)의 조정된 주파수가 상기 디지털 정보를 디코딩하는 것을 허용하는지를 나타내는 출력 신호(FEC LOCK)를 생성하는 FEC 디코더(13)를 포함하며,상기 FEC 디코더(13)는 상기 디지털 정보가 상기 FEC 디코더(13)에 의해 디코딩가능하지 않는 경우 상기 반송파 추적 루프(1111)의 로크(lock)를 중단하도록 상기 주파수를 조정하기 위한 조정 수단(19,921,923,925)에 상기 출력 신호(FEC LOCK)를 제공하며,상기 조정 수단(19,921,923,925)은, 허용된 LNB 주파수 드리프트 범위의 고주파수 종료 포인트(end point)로부터 상기 국부 발진기(911)의 상기 주파수를 변화시켜서, 상기 반송파 추적 루프(1111)가 상기 RF 신호에 동조하는 과정 동안 거짓 로크 포인트에 로크하는 것을 방지하도록 하는 것을 특징으로 하는, 디지털 신호 동조 시스템.
- 제 1 항에 있어서, 상기 반송파 추적 루프(1111)는 수치 위상 로크 루프(numerical phase lock loop) 처리부(1111-1,1111-2,1111-3,1111-4,1111-5)를 사용하는 것을 특징으로 하는, 디지털 신호 동조 시스템.
- 삭제
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US8211598P | 1998-04-17 | 1998-04-17 | |
US60/082,115 | 1998-04-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20010034657A KR20010034657A (ko) | 2001-04-25 |
KR100610564B1 true KR100610564B1 (ko) | 2006-08-09 |
Family
ID=22169161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020007010591A KR100610564B1 (ko) | 1998-04-17 | 1999-04-16 | 디지털 신호 동조 시스템 |
Country Status (10)
Country | Link |
---|---|
US (1) | US6678012B1 (ko) |
EP (1) | EP1072091B1 (ko) |
JP (1) | JP4338895B2 (ko) |
KR (1) | KR100610564B1 (ko) |
CN (1) | CN1148871C (ko) |
AU (1) | AU770301B2 (ko) |
BR (1) | BRPI9909676B1 (ko) |
DE (1) | DE69909994T2 (ko) |
MX (1) | MXPA00010064A (ko) |
WO (1) | WO1999054998A1 (ko) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6775334B1 (en) * | 1998-11-03 | 2004-08-10 | Broadcom Corporation | Equalization and decision-directed loops with trellis demodulation in high definition TV |
US7164449B1 (en) * | 1999-07-15 | 2007-01-16 | Thomson Licensing | Method and apparatus for isolating IIC bus noise from a tuner in a television receiver |
JP3920575B2 (ja) * | 2001-01-22 | 2007-05-30 | 三洋電機株式会社 | デジタル放送受信機におけるチャンネル情報登録処理方法 |
DE10122830A1 (de) * | 2001-05-11 | 2002-11-14 | Philips Corp Intellectual Pty | Abwärts-Mischeinrichtung |
EP1300956A1 (en) * | 2001-10-02 | 2003-04-09 | Matsushita Electric Industrial Co., Ltd. | Receiving apparatus |
FR2832573B1 (fr) * | 2001-11-21 | 2004-01-23 | Thomson Licensing Sa | Procede et dispositif d'installation de canaux de diffusion |
US8525931B2 (en) * | 2002-01-11 | 2013-09-03 | Thomson Licensing | Method and apparatus for isolating IIC bus noise from a tuner in a television receiver |
KR100439220B1 (ko) * | 2002-03-26 | 2004-07-05 | 엘지전자 주식회사 | 코드분할다중엑세스 시스템의 통화품질 저하 방지회로 및그 운용방법 |
GB2401733B (en) | 2003-05-16 | 2006-04-19 | Ipwireless Inc | Method and arrangement for automatic frequency control in a communication system |
US7702306B2 (en) * | 2003-08-28 | 2010-04-20 | Broadcom Corporation | Apparatus and method for local oscillator calibration in mixer circuits |
FR2867926B1 (fr) * | 2004-03-16 | 2006-07-07 | St Microelectronics Sa | Procede et systeme de reception satellitaire |
US7809083B1 (en) * | 2006-01-23 | 2010-10-05 | Marvell International Ltd. | Differential receiver with frequency offset compensation |
US8004962B2 (en) * | 2007-12-24 | 2011-08-23 | At&T Intellectual Property I, L.P. | Method and system of addressing a problem associated with a network including a video access ready device |
JP5566379B2 (ja) * | 2008-06-03 | 2014-08-06 | トムソン ライセンシング | 信号内のチャネルを決定する方法及び装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR840000227B1 (ko) * | 1980-09-26 | 1984-02-29 | 산요덴기 가부시기가이샤 | 수신기의 동조제어장치 |
EP0782271A1 (en) * | 1995-12-28 | 1997-07-02 | Thomson Consumer Electronics, Inc. | Phase locked loop with controllable response time |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
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US4081752A (en) * | 1975-05-30 | 1978-03-28 | Sanyo Electric Co., Ltd. | Digital frequency synthesizer receiver |
US4272729A (en) | 1979-05-10 | 1981-06-09 | Harris Corporation | Automatic pretuning of a voltage controlled oscillator in a frequency synthesizer using successive approximation |
US5430890A (en) * | 1992-11-20 | 1995-07-04 | Blaupunkt-Werke Gmbh | Radio receiver for mobile reception with sampling rate oscillator frequency being an integer-number multiple of reference oscillation frequency |
US5739874A (en) | 1995-06-06 | 1998-04-14 | Thomson Consumer Electronics, Inc. | Tuning system for a digital satellite receiver with fine tuning provisions |
JP3735848B2 (ja) * | 1996-05-02 | 2006-01-18 | ソニー株式会社 | デジタル通信受信装置 |
JPH1051418A (ja) * | 1996-08-06 | 1998-02-20 | Mitsubishi Electric Corp | ディジタル受信装置 |
KR100494311B1 (ko) * | 1997-05-06 | 2005-08-10 | 디지털 비디오 시스템스 인코퍼레이션 | 모터의회전유무출력장치 |
JPH11177646A (ja) * | 1997-12-12 | 1999-07-02 | Matsushita Electric Ind Co Ltd | 復調装置 |
JP2001024482A (ja) * | 1999-07-09 | 2001-01-26 | Matsushita Electric Ind Co Ltd | 受信機 |
-
1999
- 1999-04-16 JP JP2000545246A patent/JP4338895B2/ja not_active Expired - Lifetime
- 1999-04-16 EP EP99921391A patent/EP1072091B1/en not_active Expired - Lifetime
- 1999-04-16 DE DE69909994T patent/DE69909994T2/de not_active Expired - Lifetime
- 1999-04-16 WO PCT/US1999/008367 patent/WO1999054998A1/en active IP Right Grant
- 1999-04-16 AU AU38617/99A patent/AU770301B2/en not_active Expired
- 1999-04-16 CN CNB998051349A patent/CN1148871C/zh not_active Expired - Lifetime
- 1999-04-16 BR BRPI9909676-5A patent/BRPI9909676B1/pt not_active IP Right Cessation
- 1999-04-16 US US09/673,041 patent/US6678012B1/en not_active Expired - Lifetime
- 1999-04-16 MX MXPA00010064A patent/MXPA00010064A/es unknown
- 1999-04-16 KR KR1020007010591A patent/KR100610564B1/ko not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR840000227B1 (ko) * | 1980-09-26 | 1984-02-29 | 산요덴기 가부시기가이샤 | 수신기의 동조제어장치 |
EP0782271A1 (en) * | 1995-12-28 | 1997-07-02 | Thomson Consumer Electronics, Inc. | Phase locked loop with controllable response time |
Also Published As
Publication number | Publication date |
---|---|
JP2002512467A (ja) | 2002-04-23 |
WO1999054998A1 (en) | 1999-10-28 |
US6678012B1 (en) | 2004-01-13 |
MXPA00010064A (es) | 2002-08-06 |
CN1148871C (zh) | 2004-05-05 |
AU770301B2 (en) | 2004-02-19 |
BR9909676A (pt) | 2000-12-19 |
DE69909994D1 (de) | 2003-09-04 |
BRPI9909676B1 (pt) | 2015-09-01 |
AU3861799A (en) | 1999-11-08 |
CN1297610A (zh) | 2001-05-30 |
KR20010034657A (ko) | 2001-04-25 |
DE69909994T2 (de) | 2004-03-04 |
EP1072091B1 (en) | 2003-07-30 |
JP4338895B2 (ja) | 2009-10-07 |
EP1072091A1 (en) | 2001-01-31 |
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