CA1252525A - Demodulator capable of avoiding abnormal demodulation - Google Patents

Demodulator capable of avoiding abnormal demodulation

Info

Publication number
CA1252525A
CA1252525A CA000513187A CA513187A CA1252525A CA 1252525 A CA1252525 A CA 1252525A CA 000513187 A CA000513187 A CA 000513187A CA 513187 A CA513187 A CA 513187A CA 1252525 A CA1252525 A CA 1252525A
Authority
CA
Canada
Prior art keywords
phase
signal
pull
demodulator
reproduction
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
CA000513187A
Other languages
English (en)
French (fr)
Inventor
Yasuharu Yoshida
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Application granted granted Critical
Publication of CA1252525A publication Critical patent/CA1252525A/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
    • H04L27/32—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
    • H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
CA000513187A 1985-07-08 1986-07-07 Demodulator capable of avoiding abnormal demodulation Expired CA1252525A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP60150410A JPS6210950A (ja) 1985-07-08 1985-07-08 デイジタル無線通信方式
JP150410/1985 1985-07-08

Publications (1)

Publication Number Publication Date
CA1252525A true CA1252525A (en) 1989-04-11

Family

ID=15496343

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000513187A Expired CA1252525A (en) 1985-07-08 1986-07-07 Demodulator capable of avoiding abnormal demodulation

Country Status (6)

Country Link
US (1) US4755763A (OSRAM)
EP (1) EP0208284B1 (OSRAM)
JP (1) JPS6210950A (OSRAM)
AU (1) AU584552B2 (OSRAM)
CA (1) CA1252525A (OSRAM)
DE (1) DE3689133T2 (OSRAM)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5438591A (en) * 1991-07-31 1995-08-01 Kabushiki Kaisha Toshiba Quadrature amplitude modulation type digital radio communication device and method for preventing abnormal synchronization in demodulation system
FR2680923B1 (fr) * 1991-08-30 1996-11-22 Patrick Vandamme Dispositif de demodulation coherente a circuit numerique de recuperation d'onde porteuse.
US6201843B1 (en) * 1999-02-25 2001-03-13 L-3 Communications, Inc. Rapid acquisition dispersive channel receiver integrated circuit
JP4844888B2 (ja) * 2006-10-26 2011-12-28 新東工業株式会社 鋳造品の砂落とし用治具部材
KR20080088302A (ko) * 2007-03-29 2008-10-02 삼성전자주식회사 이상 변조 신호 처리 방법 및 이상 변조 신호 보상 기능을가지는 수신기
US8817936B2 (en) * 2012-05-23 2014-08-26 The Boeing Company Multiple synchronous IQ demodulators

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50104512A (OSRAM) * 1974-01-17 1975-08-18
JPS5547754A (en) * 1978-10-03 1980-04-04 Nec Corp Modulation and demodulation system of digital multi- value and multi-phase
JPS57131151A (en) * 1981-02-06 1982-08-13 Nec Corp Carrier wave reproducing circuit
US4525676A (en) * 1981-02-24 1985-06-25 Nippon Electric Co., Ltd. PSK Demodulation system having carrier frequency variation compensation
IT1145719B (it) * 1981-11-12 1986-11-05 Cselt Centro Studi Lab Telecom Circuito di recupero della partante di un segnale modulato in ampiezza e fase da segnali numerici
JPS5980048A (ja) * 1982-10-30 1984-05-09 Nec Corp 自動位相調整回路
JPS59186453A (ja) * 1983-04-08 1984-10-23 Hitachi Ltd Ｑｐｓｋ基準位相選択装置
JPS61137446A (ja) * 1984-12-10 1986-06-25 Nec Corp 復調装置

Also Published As

Publication number Publication date
DE3689133D1 (de) 1993-11-11
AU5984686A (en) 1987-01-15
DE3689133T2 (de) 1994-04-28
EP0208284B1 (en) 1993-10-06
EP0208284A3 (en) 1989-02-01
JPS6210950A (ja) 1987-01-19
US4755763A (en) 1988-07-05
AU584552B2 (en) 1989-05-25
JPH0515336B2 (OSRAM) 1993-03-01
EP0208284A2 (en) 1987-01-14

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Legal Events

Date Code Title Description
MKEX Expiry