JPS5642455A - Digital phase synchronizing circuit - Google Patents

Digital phase synchronizing circuit

Info

Publication number
JPS5642455A
JPS5642455A JP11806579A JP11806579A JPS5642455A JP S5642455 A JPS5642455 A JP S5642455A JP 11806579 A JP11806579 A JP 11806579A JP 11806579 A JP11806579 A JP 11806579A JP S5642455 A JPS5642455 A JP S5642455A
Authority
JP
Japan
Prior art keywords
phase
component
circuit
orthogonal
oscillator
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
JP11806579A
Other languages
Japanese (ja)
Other versions
JPS5816826B2 (en
Inventor
Hideo Suzuki
Meiki Yahata
Shunsuke Yoda
Tadamichi Kawasaki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP54118065A priority Critical patent/JPS5816826B2/en
Publication of JPS5642455A publication Critical patent/JPS5642455A/en
Publication of JPS5816826B2 publication Critical patent/JPS5816826B2/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

Abstract

PURPOSE:To make it possible to detect a phase error with high precision without increasing the scale of a circuit, by quantizing an in-phase component or its multiple-angle component from an orthogonal demodulator roughly and an orthogonal- phase component or its multiple-angle component thinnly. CONSTITUTION:A two-phase phase-modulated signal from terminal 1 is inputted to orthogonal demodulator 2 and demodulated with reference phase signal (y) from voltage control oscillator 5 and in-phase component (u) and orthogonal-phase component (v) are outputted to quantizing circuits 7 and 8. Circuit 7 quantizes roughly in-phase component (u) or its multiple-angle component, and circuit 8 quantizes orthogonal-phase component (v) or its multiple-angle component thinnly. Outputs of circuit 7 and 8 are multiplied mutually by multiplying circuit 3 composed of a digital circuit and with the phase comparison output of the multiplication result, the phase of oscillator 5 is controlled via loop filter 4 composed of a digital filter to output signal (y) from oscillator 5. Since the detection precision of a phase error depends upon the quantization precision of component (v), the phase error can be detected with high precision without increasing the scale of the circuit.
JP54118065A 1979-09-14 1979-09-14 digital phase synchronization circuit Expired JPS5816826B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54118065A JPS5816826B2 (en) 1979-09-14 1979-09-14 digital phase synchronization circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54118065A JPS5816826B2 (en) 1979-09-14 1979-09-14 digital phase synchronization circuit

Publications (2)

Publication Number Publication Date
JPS5642455A true JPS5642455A (en) 1981-04-20
JPS5816826B2 JPS5816826B2 (en) 1983-04-02

Family

ID=14727135

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54118065A Expired JPS5816826B2 (en) 1979-09-14 1979-09-14 digital phase synchronization circuit

Country Status (1)

Country Link
JP (1) JPS5816826B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4746574A (en) * 1984-09-25 1988-05-24 Asahi Chemical Polyflex Ltd. Antistatic sheeting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4746574A (en) * 1984-09-25 1988-05-24 Asahi Chemical Polyflex Ltd. Antistatic sheeting

Also Published As

Publication number Publication date
JPS5816826B2 (en) 1983-04-02

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