JPS5757060A - Carrier wave reproducing circuit - Google Patents

Carrier wave reproducing circuit

Info

Publication number
JPS5757060A
JPS5757060A JP55132500A JP13250080A JPS5757060A JP S5757060 A JPS5757060 A JP S5757060A JP 55132500 A JP55132500 A JP 55132500A JP 13250080 A JP13250080 A JP 13250080A JP S5757060 A JPS5757060 A JP S5757060A
Authority
JP
Japan
Prior art keywords
circuit
phase
pass filter
band pass
carrier 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
JP55132500A
Other languages
Japanese (ja)
Inventor
Tadashi Fujino
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP55132500A priority Critical patent/JPS5757060A/en
Priority to US06/304,499 priority patent/US4461014A/en
Publication of JPS5757060A publication Critical patent/JPS5757060A/en
Pending 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
    • H04L27/2275—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals
    • H04L27/2276—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals using frequency multiplication or harmonic tracking

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 reduce the cycle slip, by providing an auxiliary circuit having a band pass filter of narrow band and by comparing the output phase of the auxiliary circuit and that of a main circuit with each other to shift the output phase of the main circuit. CONSTITUTION:An M multiplier 2, a band pass filter 3, and an M frequency divider 4 constitute a main circuit of the carrier wave reproducing circuit, and the M-phase PSK signal applied to an input terminal 1 is multiplied by M to become a nonmodulation signal of the M-fold frequency and has the noise reduced by the filter 3 and is divided by M, thereby obtaining a nonmodulation carrier wave. Meanwhile, an auxiliary circuit is provided which consists of a band pass filter 7 having a band narrower than that of the band pass filter 3 and an M frequency divider 8, and output phases of auxiliary and main circuits are compared with each other; and if a difference occurs between both output phases, the cycle slip in the main circuit is discriminated to match the output phase of the M frequency divider 4 to a correct phase by a variable phase shifter 6.
JP55132500A 1980-09-23 1980-09-23 Carrier wave reproducing circuit Pending JPS5757060A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP55132500A JPS5757060A (en) 1980-09-23 1980-09-23 Carrier wave reproducing circuit
US06/304,499 US4461014A (en) 1980-09-23 1981-09-22 Carrier regenerating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55132500A JPS5757060A (en) 1980-09-23 1980-09-23 Carrier wave reproducing circuit

Publications (1)

Publication Number Publication Date
JPS5757060A true JPS5757060A (en) 1982-04-06

Family

ID=15082810

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55132500A Pending JPS5757060A (en) 1980-09-23 1980-09-23 Carrier wave reproducing circuit

Country Status (1)

Country Link
JP (1) JPS5757060A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6845083B2 (en) * 2002-02-05 2005-01-18 Qualcomm Incorporated Multi-standard transmitter system and method for a wireless communication system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5580950A (en) * 1978-12-08 1980-06-18 Fujitsu Ltd Arrier wave regenerating circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5580950A (en) * 1978-12-08 1980-06-18 Fujitsu Ltd Arrier wave regenerating circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6845083B2 (en) * 2002-02-05 2005-01-18 Qualcomm Incorporated Multi-standard transmitter system and method for a wireless communication system

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