JPS55134563A - Offset qpsk phase difference detector - Google Patents

Offset qpsk phase difference detector

Info

Publication number
JPS55134563A
JPS55134563A JP4140779A JP4140779A JPS55134563A JP S55134563 A JPS55134563 A JP S55134563A JP 4140779 A JP4140779 A JP 4140779A JP 4140779 A JP4140779 A JP 4140779A JP S55134563 A JPS55134563 A JP S55134563A
Authority
JP
Japan
Prior art keywords
phase difference
polarity
signal
sign
detection output
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
JP4140779A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6159579B2 (enrdf_load_stackoverflow
Inventor
Junji Namiki
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 JP4140779A priority Critical patent/JPS55134563A/ja
Publication of JPS55134563A publication Critical patent/JPS55134563A/ja
Publication of JPS6159579B2 publication Critical patent/JPS6159579B2/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
    • H04L27/2271—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)
JP4140779A 1979-04-05 1979-04-05 Offset qpsk phase difference detector Granted JPS55134563A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4140779A JPS55134563A (en) 1979-04-05 1979-04-05 Offset qpsk phase difference detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4140779A JPS55134563A (en) 1979-04-05 1979-04-05 Offset qpsk phase difference detector

Publications (2)

Publication Number Publication Date
JPS55134563A true JPS55134563A (en) 1980-10-20
JPS6159579B2 JPS6159579B2 (enrdf_load_stackoverflow) 1986-12-17

Family

ID=12607499

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4140779A Granted JPS55134563A (en) 1979-04-05 1979-04-05 Offset qpsk phase difference detector

Country Status (1)

Country Link
JP (1) JPS55134563A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57131151A (en) * 1981-02-06 1982-08-13 Nec Corp Carrier wave reproducing circuit
JPS5885658A (ja) * 1981-11-12 1983-05-23 シ・エツセ・エ・エレ・チ・セントロ・ステユデイ・エ・ラボラトリ・テレコミニカチオ−ニ・エツセ・ピ−・ア− デジタル信号によつて振幅および位相変調された信号の搬送波を回復させるための回路
US5189564A (en) * 1985-06-21 1993-02-23 Nobutaka Amada Magnetic recording/reproducing method and apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57131151A (en) * 1981-02-06 1982-08-13 Nec Corp Carrier wave reproducing circuit
JPS5885658A (ja) * 1981-11-12 1983-05-23 シ・エツセ・エ・エレ・チ・セントロ・ステユデイ・エ・ラボラトリ・テレコミニカチオ−ニ・エツセ・ピ−・ア− デジタル信号によつて振幅および位相変調された信号の搬送波を回復させるための回路
US5189564A (en) * 1985-06-21 1993-02-23 Nobutaka Amada Magnetic recording/reproducing method and apparatus

Also Published As

Publication number Publication date
JPS6159579B2 (enrdf_load_stackoverflow) 1986-12-17

Similar Documents

Publication Publication Date Title
JPS55134563A (en) Offset qpsk phase difference detector
EP0395860A3 (en) Fm demodulator
JPS53118927A (en) Video detecting unit
JPS5757051A (en) Fm stereo receiver
JPS5676636A (en) Variable oscillation circuit
JPS5510251A (en) Am stereophonic demodulator circuit
JPS5694857A (en) Demodulating circuit of am stereo signal
JPS5451363A (en) Regenerative circuit for carrier wave
JPS57157657A (en) Receiving clock generating circuit
JPS5474617A (en) Receiver
JPS5353216A (en) Synchronous detector circuit of video intermediate frequency signal
JPS56128027A (en) Digital phase synchronizing circuit
JPS5345914A (en) Timing signal correction circuit
JPS56116335A (en) Phase synchronism detecting system
JPS51130187A (en) Synchronizing equipment
JPS56129449A (en) Synchronizing method at demodulation of broad band signal
JPS52124849A (en) Timing signal detection circuit
JPS54104270A (en) Carrier regenerative circuit
JPS548908A (en) Correstion system of delay detection error
JPS56154837A (en) Pilot level detecting circuit
JPS5345911A (en) Timing signal extraction circuit
JPS56168452A (en) Am stereophonic receiver
JPS537125A (en) Video intermediate frequency signal synchronous detection circuit
JPS55114031A (en) Detector for pulse absence
JPS52106446A (en) Absent phase detector