GB2365732B - Modem unit - Google Patents

Modem unit

Info

Publication number
GB2365732B
GB2365732B GB0121373A GB0121373A GB2365732B GB 2365732 B GB2365732 B GB 2365732B GB 0121373 A GB0121373 A GB 0121373A GB 0121373 A GB0121373 A GB 0121373A GB 2365732 B GB2365732 B GB 2365732B
Authority
GB
United Kingdom
Prior art keywords
modem unit
modem
unit
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
GB0121373A
Other versions
GB2365732A (en
GB0121373D0 (en
Inventor
Takashi Kaku
Ryoji Okita
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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
Priority claimed from JP05208797A external-priority patent/JP3373385B2/en
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of GB0121373D0 publication Critical patent/GB0121373D0/en
Publication of GB2365732A publication Critical patent/GB2365732A/en
Application granted granted Critical
Publication of GB2365732B publication Critical patent/GB2365732B/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
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/068—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection by sampling faster than the nominal bit rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/069—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection by detecting edges or zero crossings
    • 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)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
GB0121373A 1997-03-06 1997-11-21 Modem unit Expired - Fee Related GB2365732B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP05208797A JP3373385B2 (en) 1997-03-06 1997-03-06 Frequency modulation method and modem device
GB9724700A GB2323257B (en) 1997-03-06 1997-11-21 Frequency modulation method and modem unit employing such method

Publications (3)

Publication Number Publication Date
GB0121373D0 GB0121373D0 (en) 2001-10-24
GB2365732A GB2365732A (en) 2002-02-20
GB2365732B true GB2365732B (en) 2002-04-17

Family

ID=26312640

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0121373A Expired - Fee Related GB2365732B (en) 1997-03-06 1997-11-21 Modem unit

Country Status (1)

Country Link
GB (1) GB2365732B (en)

Also Published As

Publication number Publication date
GB2365732A (en) 2002-02-20
GB0121373D0 (en) 2001-10-24

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Legal Events

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

Effective date: 20031121