GB2004164A - Synchronization of data bit streams - Google Patents

Synchronization of data bit streams

Info

Publication number
GB2004164A
GB2004164A GB7835665A GB7835665A GB2004164A GB 2004164 A GB2004164 A GB 2004164A GB 7835665 A GB7835665 A GB 7835665A GB 7835665 A GB7835665 A GB 7835665A GB 2004164 A GB2004164 A GB 2004164A
Authority
GB
United Kingdom
Prior art keywords
synchronization
bit
data bit
transmission
bits
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.)
Withdrawn
Application number
GB7835665A
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of GB2004164A publication Critical patent/GB2004164A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/342—Muting when some special characteristic of the signal is sensed which distinguishes it from noise, e.g. using speech detector
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H04L7/043—Pseudo-noise [PN] codes variable during transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H04L7/046—Speed or phase control by synchronisation signals using special codes as synchronising signal using a dotting sequence

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

An encoder includes a synchronization bit sequencer which generates a synchronization sequence, of length N, selected from a defined listing. The encoder precedes the transmission of data bit sequences with the particular N-Bit synchronization code. A decoder includes a reference register 38 containing the particular N-Bit synchronization sequence, and a resiter 32 for storing the corresponding bits in the received transmission bit sequences. The contents of the two registers are compared at 36. If a match exists between a minimum numbed of synchronization and transmission bits, a signal representative of the state of synchronization is produced. This signal may be used to activate a switch 44 which then couples subsequent transmission bits, i.e. the data bit stream, to the decoder's output. <IMAGE>
GB7835665A 1977-09-06 1978-09-05 Synchronization of data bit streams Withdrawn GB2004164A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83095177A 1977-09-06 1977-09-06

Publications (1)

Publication Number Publication Date
GB2004164A true GB2004164A (en) 1979-03-21

Family

ID=25257995

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7835665A Withdrawn GB2004164A (en) 1977-09-06 1978-09-05 Synchronization of data bit streams

Country Status (2)

Country Link
DE (1) DE2838228B2 (en)
GB (1) GB2004164A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0008491A1 (en) * 1978-08-17 1980-03-05 Motorola, Inc. Digital demodulator for phase shift keyed signals
EP0078903A1 (en) * 1981-11-11 1983-05-18 LGZ LANDIS &amp; GYR ZUG AG Method and arrangement for assuring the initial synchronization of a telegram within a receiver, the telegram consisting of bit impulse sequences
US4430742A (en) 1981-11-20 1984-02-07 Motorola, Inc. Data muting method and apparatus for radio communications systems
EP0166274A2 (en) * 1984-06-04 1986-01-02 Siemens Aktiengesellschaft Circuit for detecting a defined bit pattern in binary signals appearing serially
WO1986004754A1 (en) * 1985-02-01 1986-08-14 General Electric Company Data muting method and apparatus for audio/digital communications systems
FR2604793A1 (en) * 1986-10-07 1988-04-08 Thomson Csf CONTROL DEVICE COMPRISING A LOAD TRANSFER DEVICE AND METHOD USING THE SAME
GB2222351A (en) * 1988-06-14 1990-02-28 British Telecomm Monitoring apparatus
WO1992012585A1 (en) * 1991-01-11 1992-07-23 Sixtel S.P.A. Enabling code for radiotransmission of data
WO2021219713A1 (en) * 2020-04-30 2021-11-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for generating or receiving a synchronization header

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59221047A (en) * 1983-05-30 1984-12-12 Victor Co Of Japan Ltd Synchronizing signal detecting circuit for digital signal transmission

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE325597B (en) * 1969-03-26 1970-07-06 Ericsson Telefon Ab L M

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0008491A1 (en) * 1978-08-17 1980-03-05 Motorola, Inc. Digital demodulator for phase shift keyed signals
EP0078903A1 (en) * 1981-11-11 1983-05-18 LGZ LANDIS &amp; GYR ZUG AG Method and arrangement for assuring the initial synchronization of a telegram within a receiver, the telegram consisting of bit impulse sequences
US4506372A (en) * 1981-11-11 1985-03-19 Lgz Landis & Gyr Zug Ag. Method and apparatus for recognizing in a receiver the start of a telegram signal consisting of a bit impulse sequence
US4430742A (en) 1981-11-20 1984-02-07 Motorola, Inc. Data muting method and apparatus for radio communications systems
EP0166274A3 (en) * 1984-06-04 1988-09-14 Siemens Aktiengesellschaft Circuit for detecting a defined bit pattern in binary signals appearing serially
EP0166274A2 (en) * 1984-06-04 1986-01-02 Siemens Aktiengesellschaft Circuit for detecting a defined bit pattern in binary signals appearing serially
WO1986004754A1 (en) * 1985-02-01 1986-08-14 General Electric Company Data muting method and apparatus for audio/digital communications systems
FR2604793A1 (en) * 1986-10-07 1988-04-08 Thomson Csf CONTROL DEVICE COMPRISING A LOAD TRANSFER DEVICE AND METHOD USING THE SAME
WO1988002898A1 (en) * 1986-10-07 1988-04-21 Thomson-Csf Control device comprising a charge coupling device and method using said device
GB2222351A (en) * 1988-06-14 1990-02-28 British Telecomm Monitoring apparatus
WO1992012585A1 (en) * 1991-01-11 1992-07-23 Sixtel S.P.A. Enabling code for radiotransmission of data
US5432825A (en) * 1991-01-11 1995-07-11 Sixtel, S.P.A. Corp. Enabling code for radiotransmission of data
WO2021219713A1 (en) * 2020-04-30 2021-11-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for generating or receiving a synchronization header
WO2021219229A1 (en) * 2020-04-30 2021-11-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for generating or receiving a synchronization header

Also Published As

Publication number Publication date
DE2838228B2 (en) 1981-03-26
DE2838228A1 (en) 1979-03-15

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)