GB2307157B - Frequency offset dealing demodulator apparatus - Google Patents

Frequency offset dealing demodulator apparatus

Info

Publication number
GB2307157B
GB2307157B GB9700787A GB9700787A GB2307157B GB 2307157 B GB2307157 B GB 2307157B GB 9700787 A GB9700787 A GB 9700787A GB 9700787 A GB9700787 A GB 9700787A GB 2307157 B GB2307157 B GB 2307157B
Authority
GB
United Kingdom
Prior art keywords
dealing
frequency offset
demodulator apparatus
demodulator
offset
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
GB9700787A
Other versions
GB9700787D0 (en
GB2307157A (en
Inventor
Takashi Kaku
Hiroyasu Murata
Kyoko Hirao
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 JP02936693A external-priority patent/JP3205110B2/en
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of GB9700787D0 publication Critical patent/GB9700787D0/en
Publication of GB2307157A publication Critical patent/GB2307157A/en
Application granted granted Critical
Publication of GB2307157B publication Critical patent/GB2307157B/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
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
    • H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation
    • 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
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies
    • 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
    • H04L2027/0046—Open loops
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0083—Signalling arrangements
    • H04L2027/0089—In-band signals
    • H04L2027/0093—Intermittant signals
GB9700787A 1993-02-18 1993-08-20 Frequency offset dealing demodulator apparatus Expired - Fee Related GB2307157B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP02936693A JP3205110B2 (en) 1993-02-18 1993-02-18 Frequency offset compatible modem
GB9317383A GB2275394B (en) 1993-02-18 1993-08-20 Frequency offset dealing demodulator apparatus

Publications (3)

Publication Number Publication Date
GB9700787D0 GB9700787D0 (en) 1997-03-05
GB2307157A GB2307157A (en) 1997-05-14
GB2307157B true GB2307157B (en) 1997-08-06

Family

ID=26303407

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9700786A Expired - Fee Related GB2307156B (en) 1993-02-18 1993-08-20 Frequency offset dealing demodulator apparatus
GB9700787A Expired - Fee Related GB2307157B (en) 1993-02-18 1993-08-20 Frequency offset dealing demodulator apparatus

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9700786A Expired - Fee Related GB2307156B (en) 1993-02-18 1993-08-20 Frequency offset dealing demodulator apparatus

Country Status (1)

Country Link
GB (2) GB2307156B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5412695A (en) * 1992-12-18 1995-05-02 Fujitsu Limited Method and device for removing frequency offset

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2110881C (en) * 1992-12-09 1998-07-28 Kyo Takahashi Adaptive equalizer capable of compensating for carrier frequency offset

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5412695A (en) * 1992-12-18 1995-05-02 Fujitsu Limited Method and device for removing frequency offset

Also Published As

Publication number Publication date
GB2307156A (en) 1997-05-14
GB9700787D0 (en) 1997-03-05
GB2307156B (en) 1997-08-06
GB2307157A (en) 1997-05-14
GB9700786D0 (en) 1997-03-05

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Legal Events

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

Effective date: 20050820