JPS5453808A - Unique word detector - Google Patents

Unique word detector

Info

Publication number
JPS5453808A
JPS5453808A JP12065077A JP12065077A JPS5453808A JP S5453808 A JPS5453808 A JP S5453808A JP 12065077 A JP12065077 A JP 12065077A JP 12065077 A JP12065077 A JP 12065077A JP S5453808 A JPS5453808 A JP S5453808A
Authority
JP
Japan
Prior art keywords
unique word
synchronization
channels
correlators
terminals
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.)
Granted
Application number
JP12065077A
Other languages
Japanese (ja)
Other versions
JPS6041905B2 (en
Inventor
Makoto Miyake
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP52120650A priority Critical patent/JPS6041905B2/en
Publication of JPS5453808A publication Critical patent/JPS5453808A/en
Publication of JPS6041905B2 publication Critical patent/JPS6041905B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H04B7/212—Time-division multiple access [TDMA]

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To reduce the number of correlators to the half to simplify a hardware constitution by adopting a unique word having the same bit sequence to two channels in a four-phase modulation and demodulation-system receiver. CONSTITUTION:Bit sequences of different receiving channels are inputted to terminals 1a and 1b, and two channels are subjected to correlation detection by correlators 8 and 9 dependent upon the bit sequence of the same unique word. This output is discriminated in threshold detectors 6a and 6b after addition in adder 4 and subtraction in subtacter 5, and is outputted to terminals 7a and 7b. Synchronization is established by this output signal, and simultaneously, one state which this synchronization belongs to is detected in four states where synchronization can be established, thereby making it possible to resolve four kinds of positional uncertainties.
JP52120650A 1977-10-06 1977-10-06 unique word detector Expired JPS6041905B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52120650A JPS6041905B2 (en) 1977-10-06 1977-10-06 unique word detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52120650A JPS6041905B2 (en) 1977-10-06 1977-10-06 unique word detector

Publications (2)

Publication Number Publication Date
JPS5453808A true JPS5453808A (en) 1979-04-27
JPS6041905B2 JPS6041905B2 (en) 1985-09-19

Family

ID=14791469

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52120650A Expired JPS6041905B2 (en) 1977-10-06 1977-10-06 unique word detector

Country Status (1)

Country Link
JP (1) JPS6041905B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5457812A (en) * 1977-10-17 1979-05-10 Mitsubishi Electric Corp Unique word detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5457812A (en) * 1977-10-17 1979-05-10 Mitsubishi Electric Corp Unique word detector
JPS6154304B2 (en) * 1977-10-17 1986-11-21 Mitsubishi Electric Corp

Also Published As

Publication number Publication date
JPS6041905B2 (en) 1985-09-19

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