JPS57140044A - Digital mobile communication system - Google Patents

Digital mobile communication system

Info

Publication number
JPS57140044A
JPS57140044A JP56025959A JP2595981A JPS57140044A JP S57140044 A JPS57140044 A JP S57140044A JP 56025959 A JP56025959 A JP 56025959A JP 2595981 A JP2595981 A JP 2595981A JP S57140044 A JPS57140044 A JP S57140044A
Authority
JP
Japan
Prior art keywords
signal
status
base station
mobile station
repetitive pattern
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
JP56025959A
Other languages
Japanese (ja)
Other versions
JPS5928097B2 (en
Inventor
Takeshi Hattori
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP56025959A priority Critical patent/JPS5928097B2/en
Publication of JPS57140044A publication Critical patent/JPS57140044A/en
Publication of JPS5928097B2 publication Critical patent/JPS5928097B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W99/00—Subject matter not provided for in other groups of this subclass

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To prevent malfunction due to detouring transmission and reception, by making a repetitive pattern of a signal for loop check from a base station to a mobile station different from that from the mobile station to the base station. CONSTITUTION:A signal for loop check LC from a base station to a mobile station is denoted as repetitive pattern of 1100, and the LC signal from the mobile station to the base station is denoted as repetitive pattern of 1, 0. The repetitive signal of 1100 inputted to a terminal IN is delayed at a 1-bit delay circuit 1, and inputted to an exclusive logical sum circuit 2 together with an input signal. The output of the circuit 2 is a repetitive pattern of 1, 0, and this signal is inputted to a part-bit status discriminating means consisting of a shift register 3, inverters 4a and 4b, AND circuits 5a and 5b, a monostable multivibrator 9, a frequency divider 8 and a CPU6, and the status of the register 3 is read in every 2 bits. The CPU6 counts the output of the circuits 5a and 5b to obtain the number (a) with the status of 1, 0 and the number (b) with the status of 0, 1, and the absolute value of (a)-(b) is compared with the reference value to discriminate the reception and nonreception.
JP56025959A 1981-02-24 1981-02-24 Digital mobile communication system Expired JPS5928097B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56025959A JPS5928097B2 (en) 1981-02-24 1981-02-24 Digital mobile communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56025959A JPS5928097B2 (en) 1981-02-24 1981-02-24 Digital mobile communication system

Publications (2)

Publication Number Publication Date
JPS57140044A true JPS57140044A (en) 1982-08-30
JPS5928097B2 JPS5928097B2 (en) 1984-07-10

Family

ID=12180278

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56025959A Expired JPS5928097B2 (en) 1981-02-24 1981-02-24 Digital mobile communication system

Country Status (1)

Country Link
JP (1) JPS5928097B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59174485A (en) * 1983-03-14 1984-10-02 株式会社　サタケ Device for closing shutter
JPS63131996U (en) * 1987-02-23 1988-08-29

Also Published As

Publication number Publication date
JPS5928097B2 (en) 1984-07-10

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