JPS5580949A - Carrier wave regenerating circuit - Google Patents

Carrier wave regenerating circuit

Info

Publication number
JPS5580949A
JPS5580949A JP13603878A JP13603878A JPS5580949A JP S5580949 A JPS5580949 A JP S5580949A JP 13603878 A JP13603878 A JP 13603878A JP 13603878 A JP13603878 A JP 13603878A JP S5580949 A JPS5580949 A JP S5580949A
Authority
JP
Japan
Prior art keywords
carrier
pll
output
circuit
mixers
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
JP13603878A
Other languages
Japanese (ja)
Other versions
JPS6145908B2 (en
Inventor
Godo Futaishi
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 JP13603878A priority Critical patent/JPS5580949A/en
Publication of JPS5580949A publication Critical patent/JPS5580949A/en
Publication of JPS6145908B2 publication Critical patent/JPS6145908B2/ja
Granted 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
    • H04L27/2277—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals using remodulation

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 facilitate the security of the C (carrier)/N (noise) nescesary for the regenerated carrier by applying the noise suppression via the sample holding circuit to the noise suppression via the PLL at the carrier regenerator circuit. CONSTITUTION:The digital phase modulation wave is delivered from A/D converters 62 and 62' after the phase comparison given with the regenerated carrier of PLL 5 at demodulator 6. For the output of converter 62', the clock is extracted through clock extractor circuit 7. The output of demodulator 6 is applied also to reverse modulator 4 and then receives the reverse modulation by the input signal at mixers 42 and 42'. The outputs of mixers 42 and 42' are compounded at hybrid 43 and then supplied to PLL 5 in the form of the non-modulated carrier. One output of hybrid 55 is compared with the input of the non-modulated carrier at the phase comparator, and the voltage corresponding to the phase difference is applied to sample holding circuit 52 to be used as the control signal for VCO 54.
JP13603878A 1978-11-04 1978-11-04 Carrier wave regenerating circuit Granted JPS5580949A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13603878A JPS5580949A (en) 1978-11-04 1978-11-04 Carrier wave regenerating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13603878A JPS5580949A (en) 1978-11-04 1978-11-04 Carrier wave regenerating circuit

Publications (2)

Publication Number Publication Date
JPS5580949A true JPS5580949A (en) 1980-06-18
JPS6145908B2 JPS6145908B2 (en) 1986-10-11

Family

ID=15165718

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13603878A Granted JPS5580949A (en) 1978-11-04 1978-11-04 Carrier wave regenerating circuit

Country Status (1)

Country Link
JP (1) JPS5580949A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57129056A (en) * 1981-02-02 1982-08-10 Nec Corp Carrier wave extracting device
EP0141466A3 (en) * 1983-11-07 1985-06-19 Koninklijke Philips Electronics N.V. Sampled costas loop

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62200415U (en) * 1986-06-13 1987-12-21

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57129056A (en) * 1981-02-02 1982-08-10 Nec Corp Carrier wave extracting device
EP0141466A3 (en) * 1983-11-07 1985-06-19 Koninklijke Philips Electronics N.V. Sampled costas loop

Also Published As

Publication number Publication date
JPS6145908B2 (en) 1986-10-11

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