JPS5760744A - Discrimination method for signal transmission state in mobile communication - Google Patents

Discrimination method for signal transmission state in mobile communication

Info

Publication number
JPS5760744A
JPS5760744A JP55135382A JP13538280A JPS5760744A JP S5760744 A JPS5760744 A JP S5760744A JP 55135382 A JP55135382 A JP 55135382A JP 13538280 A JP13538280 A JP 13538280A JP S5760744 A JPS5760744 A JP S5760744A
Authority
JP
Japan
Prior art keywords
circuit
clock
signal
digital signal
level
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
JP55135382A
Other languages
Japanese (ja)
Other versions
JPS6016143B2 (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 JP55135382A priority Critical patent/JPS6016143B2/en
Publication of JPS5760744A publication Critical patent/JPS5760744A/en
Publication of JPS6016143B2 publication Critical patent/JPS6016143B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Dc Digital Transmission (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To discriminate surely the signal transmission state under an intensive fading peculiar to mobile communication, by discriminating the level by a clock of a transmission speed higher than that of a digital signal and by discriminating whether a signal exists or not on a basis of the count value of the frequency of this discrimination. CONSTITUTION:The signal which has the frequency shifted by the digital signal for control inputted to an antenna 1 is detected by a receiver 2, and the detection output is supplied to a clock circuit 4 and full-wave rectifying circuit 5 through an LPF3. The output of this circuit 5 is applied to a delay FF7 after having the waveform shaped by a comparing circuit 6. A clock for control synchronized with the digital signal is generated by the clock circuit 4 and is applied to the FF7 and an AND gate 8, and the output of the FF7 is applied to the gate 8. Then, the level is discriminated by the clock of a transmission speed higher than that of the waveform shaped digital signal, and the frequency of discrimination of level 1 is counted for a prescribed time by a counting and discriminating circuit 9, and transmission of the signal is stopped when the count value is a prescribed value or less.
JP55135382A 1980-09-27 1980-09-27 Method for determining signal transmission status in mobile communications Expired JPS6016143B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55135382A JPS6016143B2 (en) 1980-09-27 1980-09-27 Method for determining signal transmission status in mobile communications

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55135382A JPS6016143B2 (en) 1980-09-27 1980-09-27 Method for determining signal transmission status in mobile communications

Publications (2)

Publication Number Publication Date
JPS5760744A true JPS5760744A (en) 1982-04-12
JPS6016143B2 JPS6016143B2 (en) 1985-04-24

Family

ID=15150395

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55135382A Expired JPS6016143B2 (en) 1980-09-27 1980-09-27 Method for determining signal transmission status in mobile communications

Country Status (1)

Country Link
JP (1) JPS6016143B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61203453A (en) * 1985-03-06 1986-09-09 Konishiroku Photo Ind Co Ltd Magazine for storing rolled photosensitive sheet
JPH01231045A (en) * 1988-03-11 1989-09-14 Fuji Photo Film Co Ltd Photographic film cartridge

Also Published As

Publication number Publication date
JPS6016143B2 (en) 1985-04-24

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