DE69232235D1 - Trägerrückgewinnung für QPSK - Google Patents

Trägerrückgewinnung für QPSK

Info

Publication number
DE69232235D1
DE69232235D1 DE69232235T DE69232235T DE69232235D1 DE 69232235 D1 DE69232235 D1 DE 69232235D1 DE 69232235 T DE69232235 T DE 69232235T DE 69232235 T DE69232235 T DE 69232235T DE 69232235 D1 DE69232235 D1 DE 69232235D1
Authority
DE
Germany
Prior art keywords
qpsk
carrier recovery
recovery
carrier
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
DE69232235T
Other languages
English (en)
Other versions
DE69232235T2 (de
Inventor
Kazumasa Satou
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
Publication of DE69232235D1 publication Critical patent/DE69232235D1/de
Application granted granted Critical
Publication of DE69232235T2 publication Critical patent/DE69232235T2/de
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
    • H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals
    • H04L27/2273—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals associated with quadrature demodulation, e.g. Costas loop
    • 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
    • H04L2027/0059—Closed loops more than two phases
    • 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)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
DE69232235T 1991-09-30 1992-09-25 Trägerrückgewinnung für QPSK Expired - Fee Related DE69232235T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3276450A JP2771365B2 (ja) 1991-09-30 1991-09-30 搬送波再生回路

Publications (2)

Publication Number Publication Date
DE69232235D1 true DE69232235D1 (de) 2002-01-10
DE69232235T2 DE69232235T2 (de) 2002-06-13

Family

ID=17569607

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69232235T Expired - Fee Related DE69232235T2 (de) 1991-09-30 1992-09-25 Trägerrückgewinnung für QPSK

Country Status (4)

Country Link
US (1) US5341105A (de)
EP (1) EP0535880B1 (de)
JP (1) JP2771365B2 (de)
DE (1) DE69232235T2 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0787145A (ja) * 1993-09-16 1995-03-31 Toshiba Corp Ａｆｃ回路
JPH08265384A (ja) * 1995-03-22 1996-10-11 Nec Corp 復調装置
SE504341C2 (sv) * 1995-05-22 1997-01-20 Ericsson Telefon Ab L M Förfarande och anordning vid fasmodulerade signaler
JP3147147B2 (ja) * 1996-11-22 2001-03-19 日本電気株式会社 搬送波再生回路、周波数誤差検出方法および多値直交振幅復調装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100503A (en) * 1976-07-21 1978-07-11 W. C. Lindsey Inc. Correlative tracking system with lock indicator
JPS57131151A (en) * 1981-02-06 1982-08-13 Nec Corp Carrier wave reproducing circuit
JPS5980048A (ja) * 1982-10-30 1984-05-09 Nec Corp 自動位相調整回路
JPH0642689B2 (ja) * 1983-03-02 1994-06-01 日本無線株式会社 基準搬送波再生回路における擬似引込み回避方式
JPH0746790B2 (ja) * 1985-08-15 1995-05-17 日本電気株式会社 復調システム
EP0212582B1 (de) * 1985-08-15 1992-12-09 Nec Corporation Zur Synchronisationsherstellung in einem Übergangszustand geeignetes Demodulationssystem
US5005186A (en) * 1987-03-20 1991-04-02 Fujitsu Limited Digital demodulator apparatus
CA2025135C (en) * 1989-09-13 1993-06-29 Shousei Yoshida Frequency tracking circuit using samples equalized at different sampling instants of same clock period

Also Published As

Publication number Publication date
EP0535880A2 (de) 1993-04-07
EP0535880B1 (de) 2001-11-28
US5341105A (en) 1994-08-23
JPH0591154A (ja) 1993-04-09
EP0535880A3 (en) 1993-10-27
DE69232235T2 (de) 2002-06-13
JP2771365B2 (ja) 1998-07-02

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee