CA2177569A1 - Method and apparatus for locating and tracking a qpsk carrier - Google Patents

Method and apparatus for locating and tracking a qpsk carrier

Info

Publication number
CA2177569A1
CA2177569A1 CA002177569A CA2177569A CA2177569A1 CA 2177569 A1 CA2177569 A1 CA 2177569A1 CA 002177569 A CA002177569 A CA 002177569A CA 2177569 A CA2177569 A CA 2177569A CA 2177569 A1 CA2177569 A1 CA 2177569A1
Authority
CA
Canada
Prior art keywords
signal
data
carrier
tracking
circuit
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
CA002177569A
Other languages
English (en)
French (fr)
Inventor
Mark J. D'sylva
Steven S. Lawrence
Robert Strother-Stewart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Scientific Atlanta LLC
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2177569A1 publication Critical patent/CA2177569A1/en
Abandoned legal-status Critical Current

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
    • H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • 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
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Amplitude Modulation (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
CA002177569A 1993-12-03 1994-12-05 Method and apparatus for locating and tracking a qpsk carrier Abandoned CA2177569A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16083993A 1993-12-03 1993-12-03
US08/160,839 1993-12-03

Publications (1)

Publication Number Publication Date
CA2177569A1 true CA2177569A1 (en) 1995-06-08

Family

ID=22578679

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002177569A Abandoned CA2177569A1 (en) 1993-12-03 1994-12-05 Method and apparatus for locating and tracking a qpsk carrier

Country Status (9)

Country Link
US (1) US5699385A (enExample)
EP (1) EP0732021A4 (enExample)
JP (1) JPH09506221A (enExample)
KR (1) KR960706735A (enExample)
AU (1) AU689183B2 (enExample)
CA (1) CA2177569A1 (enExample)
MA (1) MA23383A1 (enExample)
TW (1) TW257923B (enExample)
WO (1) WO1995015640A1 (enExample)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0157531B1 (ko) * 1995-07-14 1998-11-16 김광호 텔레비젼신호 수신기에서 디지탈 반송파 복구 장치 및 방법
FR2737365B1 (fr) * 1995-07-26 1997-08-22 Thomson Broadcast Systems Procede et dispositif de transmission de service multimedia sur reseau prive large bande
US5828705A (en) * 1996-02-01 1998-10-27 Kroeger; Brian W. Carrier tracking technique and apparatus having automatic flywheel/tracking/reacquisition control and extended signal to noise ratio
FI963317L (fi) * 1996-08-26 1998-02-27 Nokia Technology Gmbh Monitasoisten, kaksiulotteisten modulaatioaakkostojen kantoaaltosynkronointi
FI102229B (fi) * 1996-11-05 1998-10-30 Nokia Mobile Phones Ltd Menetelmä radiovastaanottimen virityksen parantamiseksi ja radiovastaa notin
TW391114B (en) * 1997-01-31 2000-05-21 Scientific Atlanta System and method for harmonic interference avoidance in carrier recovery for digital demodulation
US6522696B1 (en) * 1997-04-11 2003-02-18 Agere Systems Inc. Adaptive frequency correction in a wireless communications system, such as for GSM and IS54
WO1999026339A1 (en) * 1997-11-18 1999-05-27 Scientific-Atlanta, Inc. Method and apparatus for locating digital carrier signals
KR100451711B1 (ko) * 1997-12-27 2005-09-30 엘지전자 주식회사 큐피에스케이 시스템에서 폴스 록 검출장치
US6707863B1 (en) 1999-05-04 2004-03-16 Northrop Grumman Corporation Baseband signal carrier recovery of a suppressed carrier modulation signal
GB9913154D0 (en) * 1999-06-08 1999-08-04 Pace Micro Tech Plc Frequency searching method and apparatus
US6433830B1 (en) * 1999-06-14 2002-08-13 General Instrument Corporation Off-air phase lock technique
JP2001024482A (ja) * 1999-07-09 2001-01-26 Matsushita Electric Ind Co Ltd 受信機
US7119834B2 (en) * 2002-06-06 2006-10-10 Microtune (Texas) L.P. Receiver and system calibration system and method
EP1422849A1 (en) * 2002-11-25 2004-05-26 Pace Micro Technology PLC Method of Scanning for Carrier signals modulated with digital data and transmitted by satellite
US7379864B2 (en) * 2003-05-06 2008-05-27 Lucent Technologies Inc. Method and apparatus for the detection of previous packet loss in non-packetized speech
US11165622B2 (en) * 2019-10-18 2021-11-02 Hughes Network Systems, LLC. System and method for low-rate high-rate coupled acquisition and tracking of high symbol rate inroutes

Family Cites Families (32)

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Publication number Priority date Publication date Assignee Title
DE2044635C3 (de) * 1970-09-09 1976-01-02 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltung zum automatischen Sendersuchlauf in Rundfunkempfängern
US3737787A (en) * 1971-06-29 1973-06-05 Gen Electric Electronic signal seeking system with rapid scan
US3921085A (en) * 1973-11-23 1975-11-18 William J Keane Frequency discriminator apparatus
US4123716A (en) * 1976-08-12 1978-10-31 The Magnavox Company Automatic frequency control for digital tuning systems
US4281412A (en) * 1979-07-05 1981-07-28 Cincinnati Electronics Corporation Method of and apparatus for transmitting and recovering offset QPSK modulated data
US4298986A (en) * 1979-12-26 1981-11-03 General Electric Company Receiver for phase-shift modulated carrier signals
US4429415A (en) * 1981-11-30 1984-01-31 Rca Corporation Signal-seeking tuning system with signal loss protection for a television receiver
US4742543A (en) * 1983-12-22 1988-05-03 Frederiksen Jeffrey E Video transmission system
US4601043A (en) * 1984-05-23 1986-07-15 Rockwell International Corporation Digital communications software control system
US4587514A (en) * 1984-09-07 1986-05-06 Verilink Corporation Interface method and apparatus
US4652903A (en) * 1984-09-21 1987-03-24 Scientific Atlanta, Inc. Frequency generation for multiplexed analog component color television encoding and decoding
US4829569A (en) * 1984-09-21 1989-05-09 Scientific-Atlanta, Inc. Communication of individual messages to subscribers in a subscription television system
US4697277A (en) * 1985-02-21 1987-09-29 Scientific Atlanta, Inc. Synchronization recovery in a communications system
US4763357A (en) * 1985-04-18 1988-08-09 Barr William S Method and apparatus for providing secure electronic communications
US4817142A (en) * 1985-05-21 1989-03-28 Scientific Atlanta, Inc. Restoring framing in a communications system
JPH0685517B2 (ja) * 1985-06-28 1994-10-26 ソニー株式会社 情報サ−ビスシステム
JPH0810879B2 (ja) * 1986-02-20 1996-01-31 富士通株式会社 復調装置
JPS62281626A (ja) * 1986-05-30 1987-12-07 Nippon Telegr & Teleph Corp <Ntt> デジタルデ−タ伝送方式
US4866770A (en) * 1986-07-08 1989-09-12 Scientific Atlanta, Inc. Method and apparatus for communication of video, audio, teletext, and data to groups of decoders in a communication system
US4890321A (en) * 1986-07-08 1989-12-26 Scientific Atlanta, Inc. Communications format for a subscription television system permitting transmission of individual text messages to subscribers
US4713630A (en) * 1986-07-29 1987-12-15 Communications Satellite Corporation BPSK Costas-type PLL circuit having false lock prevention
JPH0624342B2 (ja) * 1988-06-29 1994-03-30 日本電気株式会社 アップリンク交差偏波補償装置
JPH0748750B2 (ja) * 1988-11-15 1995-05-24 日本電気株式会社 同期復調装置
US4879728A (en) * 1989-01-31 1989-11-07 American Telephone And Telegraph Company, At&T Bell Laboratories DPSK carrier acquisition and tracking arrangement
US4994909A (en) * 1989-05-04 1991-02-19 Northern Telecom Limited Video signal distribution system
US5125105A (en) * 1989-11-30 1992-06-23 Ford Motor Company High-quality reception indicating circuit for fm receivers
US5062105A (en) * 1990-01-02 1991-10-29 At&T Bell Laboratories Programmable multiplexing techniques for mapping a capacity domain into a time domain within a frame
US5121409A (en) * 1990-04-04 1992-06-09 Artran, Inc. Multichannel satellite communication and control system
US5065107A (en) * 1990-04-19 1991-11-12 University Of Saskatchewan Phase-locked loop bandwidth switching demodulator for suppressed carrier signals
US5091936A (en) * 1991-01-30 1992-02-25 General Instrument Corporation System for communicating television signals or a plurality of digital audio signals in a standard television line allocation
US5200823A (en) * 1991-03-29 1993-04-06 Scientific-Atlanta, Inc. Virtual channels for a multiplexed analog component (mac) television system
US5390348A (en) * 1992-02-12 1995-02-14 Creative Digital Inc. System for tracking and correcting drift and dispersion in satellite transmission signals

Also Published As

Publication number Publication date
AU1295695A (en) 1995-06-19
EP0732021A4 (en) 2000-07-05
TW257923B (enExample) 1995-09-21
WO1995015640A1 (en) 1995-06-08
AU689183B2 (en) 1998-03-26
EP0732021A1 (en) 1996-09-18
KR960706735A (ko) 1996-12-09
JPH09506221A (ja) 1997-06-17
US5699385A (en) 1997-12-16
MA23383A1 (fr) 1995-07-01

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Legal Events

Date Code Title Description
EEER Examination request
FZDE Discontinued