GB2303278B - Improvements to demodulation systems - Google Patents

Improvements to demodulation systems

Info

Publication number
GB2303278B
GB2303278B GB9514126A GB9514126A GB2303278B GB 2303278 B GB2303278 B GB 2303278B GB 9514126 A GB9514126 A GB 9514126A GB 9514126 A GB9514126 A GB 9514126A GB 2303278 B GB2303278 B GB 2303278B
Authority
GB
United Kingdom
Prior art keywords
demodulation systems
demodulation
systems
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.)
Expired - Fee Related
Application number
GB9514126A
Other versions
GB2303278A (en
GB9514126D0 (en
Inventor
Remo Giovanni Andrea Marzolini
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.)
Individual
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
Priority to GB9514126A priority Critical patent/GB2303278B/en
Publication of GB9514126D0 publication Critical patent/GB9514126D0/en
Publication of GB2303278A publication Critical patent/GB2303278A/en
Application granted granted Critical
Publication of GB2303278B publication Critical patent/GB2303278B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/001—Details of arrangements applicable to more than one type of frequency demodulator
    • H03D3/003—Arrangements for reducing frequency deviation, e.g. by negative frequency feedback
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/001—Details of arrangements applicable to more than one type of frequency demodulator
    • H03D3/003—Arrangements for reducing frequency deviation, e.g. by negative frequency feedback
    • H03D3/005—Arrangements for reducing frequency deviation, e.g. by negative frequency feedback wherein the demodulated signal is used for controlling a bandpass filter
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
    • H03D3/24—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits
    • H03D3/241—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits the oscillator being part of a phase locked loop
    • H03D3/244—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits the oscillator being part of a phase locked loop combined with means for obtaining automatic gain control
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Multimedia (AREA)
  • Power Engineering (AREA)
  • Noise Elimination (AREA)
GB9514126A 1995-07-11 1995-07-11 Improvements to demodulation systems Expired - Fee Related GB2303278B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9514126A GB2303278B (en) 1995-07-11 1995-07-11 Improvements to demodulation systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9514126A GB2303278B (en) 1995-07-11 1995-07-11 Improvements to demodulation systems

Publications (3)

Publication Number Publication Date
GB9514126D0 GB9514126D0 (en) 1995-09-13
GB2303278A GB2303278A (en) 1997-02-12
GB2303278B true GB2303278B (en) 2000-04-26

Family

ID=10777466

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9514126A Expired - Fee Related GB2303278B (en) 1995-07-11 1995-07-11 Improvements to demodulation systems

Country Status (1)

Country Link
GB (1) GB2303278B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3646010B2 (en) * 1998-09-18 2005-05-11 株式会社ケンウッド Digital satellite receiver
US8212941B2 (en) 2008-04-30 2012-07-03 Mediatek Inc. Digitized analog TV signal processing system

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2161678A (en) * 1984-07-10 1986-01-15 Toshiba Kk Carrier reproducing circuit for phase shift keying signals
EP0219863A2 (en) * 1985-10-25 1987-04-29 Siemens Aktiengesellschaft Lock circuit for carrier recovery from a QAM signal
EP0235300A1 (en) * 1985-08-30 1987-09-09 Fujitsu Limited Radio data transmission system
EP0249931A2 (en) * 1986-06-18 1987-12-23 Fujitsu Limited Decision timing control circuit
EP0369406A2 (en) * 1988-11-15 1990-05-23 Nec Corporation Coherent PSK demodulator using bit error rate and S/N ratio to establish synchronization
US5065107A (en) * 1990-04-19 1991-11-12 University Of Saskatchewan Phase-locked loop bandwidth switching demodulator for suppressed carrier signals
GB2271042A (en) * 1992-09-08 1994-03-30 Tektronix Inc Error detection / concealment for serial digital video
JPH06216655A (en) * 1993-01-13 1994-08-05 Nec Corp Demodulation circuit
WO1995001035A1 (en) * 1993-06-21 1995-01-05 Kabushiki Kaisha Toshiba Digital radio communication equipment
GB2279854A (en) * 1993-03-10 1995-01-11 Toyo Communication Equip Digital Demodulator

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2161678A (en) * 1984-07-10 1986-01-15 Toshiba Kk Carrier reproducing circuit for phase shift keying signals
EP0235300A1 (en) * 1985-08-30 1987-09-09 Fujitsu Limited Radio data transmission system
EP0219863A2 (en) * 1985-10-25 1987-04-29 Siemens Aktiengesellschaft Lock circuit for carrier recovery from a QAM signal
EP0249931A2 (en) * 1986-06-18 1987-12-23 Fujitsu Limited Decision timing control circuit
EP0369406A2 (en) * 1988-11-15 1990-05-23 Nec Corporation Coherent PSK demodulator using bit error rate and S/N ratio to establish synchronization
US5065107A (en) * 1990-04-19 1991-11-12 University Of Saskatchewan Phase-locked loop bandwidth switching demodulator for suppressed carrier signals
GB2271042A (en) * 1992-09-08 1994-03-30 Tektronix Inc Error detection / concealment for serial digital video
JPH06216655A (en) * 1993-01-13 1994-08-05 Nec Corp Demodulation circuit
GB2279854A (en) * 1993-03-10 1995-01-11 Toyo Communication Equip Digital Demodulator
WO1995001035A1 (en) * 1993-06-21 1995-01-05 Kabushiki Kaisha Toshiba Digital radio communication equipment

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan on JP 7015482 *
WPI Abstract Accession No. 94-226505/28 & JP060216655A (NEC Corp) 05.08.94 (see abstract) *

Also Published As

Publication number Publication date
GB2303278A (en) 1997-02-12
GB9514126D0 (en) 1995-09-13

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20010711