NL8302354A - Keteninrichting voor het herstellen van een draaggolf. - Google Patents

Keteninrichting voor het herstellen van een draaggolf. Download PDF

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Publication number
NL8302354A
NL8302354A NL8302354A NL8302354A NL8302354A NL 8302354 A NL8302354 A NL 8302354A NL 8302354 A NL8302354 A NL 8302354A NL 8302354 A NL8302354 A NL 8302354A NL 8302354 A NL8302354 A NL 8302354A
Authority
NL
Netherlands
Prior art keywords
data
signal
quadrants
space diagram
channel
Prior art date
Application number
NL8302354A
Other languages
English (en)
Dutch (nl)
Original Assignee
Western Electric Co
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 Western Electric Co filed Critical Western Electric Co
Publication of NL8302354A publication Critical patent/NL8302354A/nl

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
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • H04L2027/0028—Correction of carrier offset at passband 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
    • H04L2027/0053—Closed loops
    • H04L2027/0057—Closed loops quadrature phase

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
NL8302354A 1982-07-02 1983-07-01 Keteninrichting voor het herstellen van een draaggolf. NL8302354A (nl)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US39484882 1982-07-02
US06/394,848 US4458356A (en) 1982-07-02 1982-07-02 Carrier recovery circuit

Publications (1)

Publication Number Publication Date
NL8302354A true NL8302354A (nl) 1984-02-01

Family

ID=23560645

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8302354A NL8302354A (nl) 1982-07-02 1983-07-01 Keteninrichting voor het herstellen van een draaggolf.

Country Status (4)

Country Link
US (1) US4458356A (ja)
JP (1) JPS5922467A (ja)
CA (1) CA1192615A (ja)
NL (1) NL8302354A (ja)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8203600A (nl) * 1982-09-17 1984-04-16 Philips Nv Hoofdeinde en ontvanger voor een signaaldistributiesysteem.
US4534026A (en) * 1983-12-06 1985-08-06 Paradyne Corporation Normalized error compensator for modems using radial amplitude modulation for multiplexing
US5266858A (en) * 1984-04-23 1993-11-30 Nippondenso Co., Ltd. Armatures and method for manufacturing such armatures
JPS60261281A (ja) * 1984-06-08 1985-12-24 Matsushita Electric Ind Co Ltd 色信号処理装置
US4571550A (en) * 1984-06-22 1986-02-18 Rockwell International Corporation QAM Demodulator carrier recovery loop using n-m LSB's
US4574244A (en) * 1984-06-22 1986-03-04 Rockwell International Corporation QAM Demodulator automatic quadrature loop using n-m LSB's
US4648100A (en) * 1985-03-28 1987-03-03 At&T Bell Laboratories Carrier recovery circuit
FR2593341B1 (fr) * 1986-01-20 1988-03-04 Alcatel Thomson Faisceaux Dispositif de recuperation de rythme
US4780887A (en) * 1986-08-21 1988-10-25 Nec Corporation Carrier recovery circuitry immune to interburst frequency variations
US4759036A (en) 1987-03-02 1988-07-19 American Telephone And Telegraph Company Decision-directed control circuit
US4736386A (en) * 1987-04-06 1988-04-05 Rockwell International Corporation Carrier out-of-lock detector apparatus
FR2621188B1 (fr) * 1987-09-25 1989-12-29 Labo Electronique Physique Circuit de recuperation de l'onde porteuse de systemes de transmissions numeriques
US5131008A (en) * 1989-04-28 1992-07-14 Motorola, Inc. DSP-based GMSK coherent detector
US4959844A (en) * 1989-10-24 1990-09-25 Amp Incorporated Clock recovery circuit for digital demodulator
US5251210A (en) * 1991-11-01 1993-10-05 Ibm Corporation Method and apparatus for transforming low bandwidth telecommunications channels into a high bandwidth telecommunication channel
US6647028B1 (en) 1997-09-30 2003-11-11 Cisco Technology, Inc. System and method for recovering and restoring lost data in a N-channel coherent data transmission system
JP3206553B2 (ja) * 1998-07-22 2001-09-10 日本電気株式会社 復調装置
US8259859B2 (en) * 2009-09-21 2012-09-04 Techwell Llc Method and system for carrier recovery for QAM
US8488697B2 (en) 2011-05-06 2013-07-16 Northrop Grumman Systems Corporation Universal timing recovery circuit
CN103430456B (zh) * 2012-10-31 2015-04-08 华为技术有限公司 一种发射机、接收机及射频收发方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818347A (en) * 1972-10-10 1974-06-18 Intertel Inc Receiver for amplitude modulated quadrature carrier signals
US3934205A (en) * 1975-01-27 1976-01-20 International Telephone And Telegraph Corporation Frequency lock loop employing a gated frequency difference detector having positive, zero and negative threshold detectors
US3978407A (en) * 1975-07-23 1976-08-31 Codex Corporation Fast start-up adaptive equalizer communication system using two data transmission rates
US4027265A (en) * 1976-06-03 1977-05-31 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Unbalanced quadriphase demodulator
US4079329A (en) * 1976-11-11 1978-03-14 Harris Corporation Signal demodulator including data normalization
US4234957A (en) * 1978-12-04 1980-11-18 Gte Automatic Electric Laboratories Incorporated Method and apparatus for generating timing phase error signals in PSK demodulators

Also Published As

Publication number Publication date
CA1192615A (en) 1985-08-27
US4458356A (en) 1984-07-03
JPS5922467A (ja) 1984-02-04

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Legal Events

Date Code Title Description
A85 Still pending on 85-01-01
BV The patent application has lapsed