JPS57162563A - Delay wave detecting circuit - Google Patents

Delay wave detecting circuit

Info

Publication number
JPS57162563A
JPS57162563A JP56047907A JP4790781A JPS57162563A JP S57162563 A JPS57162563 A JP S57162563A JP 56047907 A JP56047907 A JP 56047907A JP 4790781 A JP4790781 A JP 4790781A JP S57162563 A JPS57162563 A JP S57162563A
Authority
JP
Japan
Prior art keywords
circuit
output
delay
detector
phase
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
JP56047907A
Other languages
Japanese (ja)
Other versions
JPS6338142B2 (en
Inventor
Yutaka Koizumi
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 JP56047907A priority Critical patent/JPS57162563A/en
Publication of JPS57162563A publication Critical patent/JPS57162563A/en
Publication of JPS6338142B2 publication Critical patent/JPS6338142B2/ja
Granted legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/18Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22Demodulator circuits; Receiver circuits
    • H04L27/233Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2331Demodulator circuits; Receiver circuits using non-coherent demodulation wherein the received signal is demodulated using one or more delayed versions of itself

Landscapes

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

Abstract

PURPOSE:To obtain a delay wave detecting circuit being affected with the fluctuation of the input carrier frequency and the fluctuation of the delay degree of a delay circuit, by makig the output of the delay circuit of a delay wave detecting circuit pass through a variable phase circuit which is controlled by the output of a circuit that detects the above-mentioned fluctuations. CONSTITUTION:The input carrier wave signal is branched into three parts by a signal branching circuit 1. The 1st output b1 is led directly to a phase wave detector 2; the 2nd output b2 is led to the detector 2 via a delay circuit 3 and a variable phase shifter 5; and the 3rd output b3 is shifted by pi/d2 phase and then receives the phase wave detection by the output of the shifter 5 and a control signal detector 7. The signal of the detector 7 is switched by a switch circuit 8 and based on the output of the detector 2, and the outut of the detector 2 controls the shifter 5. A series of these loops function to suppress the effect of the carrier frequency and the delay degree of the carrier 3.
JP56047907A 1981-03-30 1981-03-30 Delay wave detecting circuit Granted JPS57162563A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56047907A JPS57162563A (en) 1981-03-30 1981-03-30 Delay wave detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56047907A JPS57162563A (en) 1981-03-30 1981-03-30 Delay wave detecting circuit

Publications (2)

Publication Number Publication Date
JPS57162563A true JPS57162563A (en) 1982-10-06
JPS6338142B2 JPS6338142B2 (en) 1988-07-28

Family

ID=12788443

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56047907A Granted JPS57162563A (en) 1981-03-30 1981-03-30 Delay wave detecting circuit

Country Status (1)

Country Link
JP (1) JPS57162563A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986000186A1 (en) * 1984-06-08 1986-01-03 Independent Broadcasting Authority Circuit for demodulating phase shift keyed signals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986000186A1 (en) * 1984-06-08 1986-01-03 Independent Broadcasting Authority Circuit for demodulating phase shift keyed signals

Also Published As

Publication number Publication date
JPS6338142B2 (en) 1988-07-28

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