JPS5573164A - Synchronous demodulation system of msk signal - Google Patents

Synchronous demodulation system of msk signal

Info

Publication number
JPS5573164A
JPS5573164A JP14537178A JP14537178A JPS5573164A JP S5573164 A JPS5573164 A JP S5573164A JP 14537178 A JP14537178 A JP 14537178A JP 14537178 A JP14537178 A JP 14537178A JP S5573164 A JPS5573164 A JP S5573164A
Authority
JP
Japan
Prior art keywords
signal
phase
detection output
synchronous
giving
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
JP14537178A
Other languages
Japanese (ja)
Other versions
JPS5925502B2 (en
Inventor
Kazuaki Murota
Kenkichi Hiraide
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.)
NTT Inc
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 JP14537178A priority Critical patent/JPS5925502B2/en
Publication of JPS5573164A publication Critical patent/JPS5573164A/en
Publication of JPS5925502B2 publication Critical patent/JPS5925502B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals
    • H04L27/2273—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals associated with quadrature demodulation, e.g. Costas loop

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 realize a carrier synchronous circuit or the like with a small number and simple component parts by giving multiplication between the detection output signal and the 2-division signal of the clock and then giving the synchronous control to the phase of the reference signal with the DC component of the above multiplication and based on the minimum shift keying received input signal. CONSTITUTION:The both the sine and cosine phase comparisons are given via two phase comparators 11 and 12 between the reference carrier signal and the input signal applied to input terminal 1 to secure the in-phase and orthogonal-phase detection output. These signals are then demodulated and delivered 9 through the differential logic conversion of the detection output. Then phase comparison 16 is given to the two detection output, and the signal thus obtained is multiplied 17 by the signal obtained by giving 2-division 20 to the synchronous timing clock signal supplied to terminal 5. And the synchronous control is given to the phase of the reference signal by the DC component of the multiplication signal and based on the minimum shift keying MSK received input signal. As a result, the carrier synchronous and demodulator circuits can be realized with a small number and simple component parts.
JP14537178A 1978-11-27 1978-11-27 MSK signal synchronous demodulation method Expired JPS5925502B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14537178A JPS5925502B2 (en) 1978-11-27 1978-11-27 MSK signal synchronous demodulation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14537178A JPS5925502B2 (en) 1978-11-27 1978-11-27 MSK signal synchronous demodulation method

Publications (2)

Publication Number Publication Date
JPS5573164A true JPS5573164A (en) 1980-06-02
JPS5925502B2 JPS5925502B2 (en) 1984-06-18

Family

ID=15383666

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14537178A Expired JPS5925502B2 (en) 1978-11-27 1978-11-27 MSK signal synchronous demodulation method

Country Status (1)

Country Link
JP (1) JPS5925502B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5922468A (en) * 1982-07-02 1984-02-04 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Digital data demodulator
JPS59183562A (en) * 1983-04-02 1984-10-18 Nippon Hoso Kyokai <Nhk> Code signal transmitting system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5922468A (en) * 1982-07-02 1984-02-04 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Digital data demodulator
JPS59183562A (en) * 1983-04-02 1984-10-18 Nippon Hoso Kyokai <Nhk> Code signal transmitting system

Also Published As

Publication number Publication date
JPS5925502B2 (en) 1984-06-18

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