JPS5637745A - Gate signal extracting circuit for time-division multiple connection system - Google Patents

Gate signal extracting circuit for time-division multiple connection system

Info

Publication number
JPS5637745A
JPS5637745A JP11335779A JP11335779A JPS5637745A JP S5637745 A JPS5637745 A JP S5637745A JP 11335779 A JP11335779 A JP 11335779A JP 11335779 A JP11335779 A JP 11335779A JP S5637745 A JPS5637745 A JP S5637745A
Authority
JP
Japan
Prior art keywords
signal
circuit
gate signal
detecting circuit
received
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
JP11335779A
Other languages
Japanese (ja)
Other versions
JPH0222584B2 (en
Inventor
Masaaki Atobe
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP11335779A priority Critical patent/JPS5637745A/en
Publication of JPS5637745A publication Critical patent/JPS5637745A/en
Publication of JPH0222584B2 publication Critical patent/JPH0222584B2/ja
Granted 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
    • H04L7/10—Arrangements for initial synchronisation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Radio Relay Systems (AREA)

Abstract

PURPOSE:To realize the production of the gate signal to discriminate the preword part from the information word part for the reception signal, by providing the circuit to extract the phase modulation component plus the BPF which uses the output of the above-mentioned circuit as the input. CONSTITUTION:At the gate signal detecting circuit, the signal received 8 is delayed by a fixed time through the delaying circuit 14 and then supplied to the phase detecting circuit 15. While the part of the signal received 8 is branched to be supplied to the other terminal of the circuit 15 and then form the delay detecting circuit. In case the preword at the head part of the received burst-type signal is the signal which received a phase modulation to give the phases alpha and beta alternately to the carrier wave, the frequency signal of (1/2)fS (fS: timing signal) is transmitted to the output of the delay detecting circuit. And a big difference is produced to the signal quantity between the preword part and subsequent information word part after passing through the BPF16 whose central frequency is (1/2)fS. Accordingly, the gate signal which gives clear discrimination between both word parts is obtained after detection of the envelope curve through the wave detector 17 and according to the detection level, and then delivered to the terminal 9.
JP11335779A 1979-09-04 1979-09-04 Gate signal extracting circuit for time-division multiple connection system Granted JPS5637745A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11335779A JPS5637745A (en) 1979-09-04 1979-09-04 Gate signal extracting circuit for time-division multiple connection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11335779A JPS5637745A (en) 1979-09-04 1979-09-04 Gate signal extracting circuit for time-division multiple connection system

Publications (2)

Publication Number Publication Date
JPS5637745A true JPS5637745A (en) 1981-04-11
JPH0222584B2 JPH0222584B2 (en) 1990-05-21

Family

ID=14610219

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11335779A Granted JPS5637745A (en) 1979-09-04 1979-09-04 Gate signal extracting circuit for time-division multiple connection system

Country Status (1)

Country Link
JP (1) JPS5637745A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59131233A (en) * 1983-01-18 1984-07-28 Nec Corp Detecting circuit of burst signal
JP2002101139A (en) * 2000-09-22 2002-04-05 Hitachi Kokusai Electric Inc Method for demodulating

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4847752A (en) * 1971-10-19 1973-07-06

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4847752A (en) * 1971-10-19 1973-07-06

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59131233A (en) * 1983-01-18 1984-07-28 Nec Corp Detecting circuit of burst signal
JPH047614B2 (en) * 1983-01-18 1992-02-12 Nippon Electric Co
JP2002101139A (en) * 2000-09-22 2002-04-05 Hitachi Kokusai Electric Inc Method for demodulating

Also Published As

Publication number Publication date
JPH0222584B2 (en) 1990-05-21

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