DE3787581T2 - Demodulator für 8-stufige Phasenumtastung. - Google Patents

Demodulator für 8-stufige Phasenumtastung.

Info

Publication number
DE3787581T2
DE3787581T2 DE87109863T DE3787581T DE3787581T2 DE 3787581 T2 DE3787581 T2 DE 3787581T2 DE 87109863 T DE87109863 T DE 87109863T DE 3787581 T DE3787581 T DE 3787581T DE 3787581 T2 DE3787581 T2 DE 3787581T2
Authority
DE
Germany
Prior art keywords
demodulator
phase shift
shift keying
stage phase
stage
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 - Lifetime
Application number
DE87109863T
Other languages
English (en)
Other versions
DE3787581D1 (de
Inventor
Shoichi C O Nec Corp Mizoguchi
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
Priority claimed from JP61161376A external-priority patent/JPH0640628B2/ja
Priority claimed from JP3763287A external-priority patent/JPH0644772B2/ja
Application filed by NEC Corp filed Critical NEC Corp
Publication of DE3787581D1 publication Critical patent/DE3787581D1/de
Application granted granted Critical
Publication of DE3787581T2 publication Critical patent/DE3787581T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04L27/01—Equalisers
    • 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
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • H04L2027/0038—Correction of carrier offset using an equaliser
    • H04L2027/0042—Correction of carrier offset using an equaliser the equaliser providing the offset correction per se
    • 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
    • H04L2027/0071—Control of loops
    • H04L2027/0073—Detection of synchronisation state
    • 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
    • H04L2027/0071—Control of loops
    • H04L2027/0079—Switching between loops

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
DE87109863T 1986-07-09 1987-07-08 Demodulator für 8-stufige Phasenumtastung. Expired - Lifetime DE3787581T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP61161376A JPH0640628B2 (ja) 1986-07-09 1986-07-09 ８相位相復調方式
JP3763287A JPH0644772B2 (ja) 1987-02-20 1987-02-20 ８相位相復調方式

Publications (2)

Publication Number Publication Date
DE3787581D1 DE3787581D1 (de) 1993-11-04
DE3787581T2 true DE3787581T2 (de) 1994-04-28

Family

ID=26376764

Family Applications (1)

Application Number Title Priority Date Filing Date
DE87109863T Expired - Lifetime DE3787581T2 (de) 1986-07-09 1987-07-08 Demodulator für 8-stufige Phasenumtastung.

Country Status (5)

Country Link
US (1) US4803438A (de)
EP (1) EP0252500B1 (de)
AU (1) AU588201B2 (de)
CA (1) CA1287383C (de)
DE (1) DE3787581T2 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4856030A (en) * 1988-07-20 1989-08-08 Itt Defense Communications Apparatus and methods of locking a receiving modem to a transmitting modem employing a burst signal
FR2721778B1 (fr) * 1994-06-23 1996-09-06 France Telecom Procédé d'estimation d'une erreur de phase résiduelle sur les échantillons d'un signal numérique démodulé, et procédé de correction correspondant.
US5583413A (en) * 1994-09-06 1996-12-10 Cruising Equipment, Inc. Power conversion equipment monitor/controller method and apparatus
FR2725097B1 (fr) * 1994-09-23 1997-01-17 France Telecom Procede et dispositif d'evaluation numerique de la phase d'une porteuse modulee
US5999349A (en) * 1996-12-30 1999-12-07 Daewoo Electronics Co., Ltd. Waveform equalization apparatus
FR2764158B1 (fr) * 1997-06-03 1999-08-20 Texas Instruments France Procede et dispositif d'estimation du decalage de frequence dans un signal recu par un demodulateur de telephone mobile
US6760371B1 (en) * 2000-03-22 2004-07-06 The Boeing Company Method and apparatus implementation of a zero forcing equalizer
US7660344B2 (en) * 2002-06-28 2010-02-09 Bwa Technology, Inc. AGC fine-tuning by the adaptive time domain equalizer
US8509355B2 (en) * 2008-06-30 2013-08-13 Medtronic, Inc. Method and apparatus for low power simultaneous frequency, automatic gain control and timing acquisition in radio receivers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4540948A (en) * 1982-09-14 1985-09-10 Nec Corporation 8-Phase phase-shift keying demodulator
JPS5962228A (ja) * 1982-10-01 1984-04-09 Nec Corp 自動等化器
CA1238368A (en) * 1983-10-14 1988-06-21 Takayuki Ozaki Digital radio receiving apparatus
CA1282127C (en) * 1985-06-29 1991-03-26 Nec Corporation Digital demodulation system
JPS6387828A (ja) * 1986-09-30 1988-04-19 Nec Corp デイジタル復調システム

Also Published As

Publication number Publication date
DE3787581D1 (de) 1993-11-04
AU588201B2 (en) 1989-09-07
AU7534187A (en) 1988-01-14
EP0252500B1 (de) 1993-09-29
EP0252500A2 (de) 1988-01-13
US4803438A (en) 1989-02-07
EP0252500A3 (en) 1989-11-23
CA1287383C (en) 1991-08-06

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition