JPS52106613A - Signal detection - Google Patents

Signal detection

Info

Publication number
JPS52106613A
JPS52106613A JP2382076A JP2382076A JPS52106613A JP S52106613 A JPS52106613 A JP S52106613A JP 2382076 A JP2382076 A JP 2382076A JP 2382076 A JP2382076 A JP 2382076A JP S52106613 A JPS52106613 A JP S52106613A
Authority
JP
Japan
Prior art keywords
signal detection
increase
operation time
local oscillator
square wave
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.)
Pending
Application number
JP2382076A
Other languages
Japanese (ja)
Inventor
Takashi Usami
Kensaku Fujii
Shiro Kikuchi
Hiroshi Kitano
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.)
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP2382076A priority Critical patent/JPS52106613A/en
Publication of JPS52106613A publication Critical patent/JPS52106613A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/448—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency with conversion of a single frequency signal into a digital signal
    • H04Q1/4485—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency with conversion of a single frequency signal into a digital signal which is transmitted in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To shorten operation time and to increase PCM multiplexing by using the special cycle square wave generated by the local oscillator of digital receiver for signal detection.
JP2382076A 1976-03-04 1976-03-04 Signal detection Pending JPS52106613A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2382076A JPS52106613A (en) 1976-03-04 1976-03-04 Signal detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2382076A JPS52106613A (en) 1976-03-04 1976-03-04 Signal detection

Publications (1)

Publication Number Publication Date
JPS52106613A true JPS52106613A (en) 1977-09-07

Family

ID=12120979

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2382076A Pending JPS52106613A (en) 1976-03-04 1976-03-04 Signal detection

Country Status (1)

Country Link
JP (1) JPS52106613A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62159521A (en) * 1985-12-20 1987-07-15 インタ−ナシヨナル・スタンダ−ド・エレクトリツク・コ−ポレイシヨン Digital tone squelch detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62159521A (en) * 1985-12-20 1987-07-15 インタ−ナシヨナル・スタンダ−ド・エレクトリツク・コ−ポレイシヨン Digital tone squelch detector
JPH0517730B2 (en) * 1985-12-20 1993-03-10 Intaanashonaru Sutandaado Erekutoritsuku Corp

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