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GB2144283B - Demodulator - Google Patents

Demodulator

Info

Publication number
GB2144283B
GB2144283B GB08320244A GB8320244A GB2144283B GB 2144283 B GB2144283 B GB 2144283B GB 08320244 A GB08320244 A GB 08320244A GB 8320244 A GB8320244 A GB 8320244A GB 2144283 B GB2144283 B GB 2144283B
Authority
GB
United Kingdom
Prior art keywords
demodulator
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
Application number
GB08320244A
Other versions
GB8320244D0 (en
GB2144283A (en
Inventor
Thomas Boyd
Peter Lydiard
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.)
REDIFFUSION RADIO SYST
Original Assignee
REDIFFUSION RADIO SYST
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 REDIFFUSION RADIO SYST filed Critical REDIFFUSION RADIO SYST
Priority to GB08320244A priority Critical patent/GB2144283B/en
Publication of GB8320244D0 publication Critical patent/GB8320244D0/en
Publication of GB2144283A publication Critical patent/GB2144283A/en
Application granted granted Critical
Publication of GB2144283B publication Critical patent/GB2144283B/en
Expired 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
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/14—Demodulator circuits; Receiver circuits
    • H04L27/144—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements
    • H04L27/152—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements using controlled oscillators, e.g. PLL arrangements
    • H04L27/1525—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements using controlled oscillators, e.g. PLL arrangements using quadrature demodulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • H04L2027/003—Correction of carrier offset at baseband only
    • 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
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0063—Elements of loops
    • H04L2027/0067—Phase error detectors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
GB08320244A 1983-07-27 1983-07-27 Demodulator Expired GB2144283B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08320244A GB2144283B (en) 1983-07-27 1983-07-27 Demodulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08320244A GB2144283B (en) 1983-07-27 1983-07-27 Demodulator

Publications (3)

Publication Number Publication Date
GB8320244D0 GB8320244D0 (en) 1983-09-01
GB2144283A GB2144283A (en) 1985-02-27
GB2144283B true GB2144283B (en) 1986-09-17

Family

ID=10546368

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08320244A Expired GB2144283B (en) 1983-07-27 1983-07-27 Demodulator

Country Status (1)

Country Link
GB (1) GB2144283B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5842137A (en) 1986-08-07 1998-11-24 Interdigital Technology Corporation Subscriber unit for wireless digital telephone system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173364B (en) * 1985-04-03 1988-10-05 Stc Plc Digital zero if circuit
GB2186139A (en) * 1986-01-30 1987-08-05 Plessey Co Plc Phase and quadrature receiver
AU656056B2 (en) * 1992-03-27 1995-01-19 Viscount Plastics Pty Ltd A floor module for an animal pen
GB0005591D0 (en) * 2000-03-09 2000-05-03 Koninkl Philips Electronics Nv Method of and receiver for detecting the presence of a data
GB0005592D0 (en) * 2000-03-09 2000-05-03 Koninkl Philips Electronics Nv Method of and a radio terminal for detecting the presence of a 2fsk signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5842137A (en) 1986-08-07 1998-11-24 Interdigital Technology Corporation Subscriber unit for wireless digital telephone system

Also Published As

Publication number Publication date
GB8320244D0 (en) 1983-09-01
GB2144283A (en) 1985-02-27

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Legal Events

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

Effective date: 19940727