[go: up one dir, main page]

FR2434515A1 - Demodulator for four-phase PSK microwave system - adjusts phase offset of carrier to improve system error rate at particular carrier-to-noise ratio - Google Patents

Demodulator for four-phase PSK microwave system - adjusts phase offset of carrier to improve system error rate at particular carrier-to-noise ratio

Info

Publication number
FR2434515A1
FR2434515A1 FR7824706A FR7824706A FR2434515A1 FR 2434515 A1 FR2434515 A1 FR 2434515A1 FR 7824706 A FR7824706 A FR 7824706A FR 7824706 A FR7824706 A FR 7824706A FR 2434515 A1 FR2434515 A1 FR 2434515A1
Authority
FR
France
Prior art keywords
demodulator
carrier
noise ratio
error rate
phase offset
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
FR7824706A
Other languages
French (fr)
Other versions
FR2434515B1 (en
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.)
Post Office
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Priority to FR7824706A priority Critical patent/FR2434515A1/en
Publication of FR2434515A1 publication Critical patent/FR2434515A1/en
Application granted granted Critical
Publication of FR2434515B1 publication Critical patent/FR2434515B1/fr
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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

The demodulator for PSK microwave has a carrier signal recovery circuit (1) and two demodulator units (2, 3). The output of the carrier recovery circuit is connected through a variable phase offset circuit (5), to a phase reference input of the first demodulator unit, and to a similar input of the second demodulator unit through a 90 deg. phase shifteR. The output signals from the demodulator units are fed to an output terminal and to a monitoring unit for supplying control signals to the variable phase offset circuit through a control circuit.
FR7824706A 1978-08-25 1978-08-25 Demodulator for four-phase PSK microwave system - adjusts phase offset of carrier to improve system error rate at particular carrier-to-noise ratio Granted FR2434515A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7824706A FR2434515A1 (en) 1978-08-25 1978-08-25 Demodulator for four-phase PSK microwave system - adjusts phase offset of carrier to improve system error rate at particular carrier-to-noise ratio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7824706A FR2434515A1 (en) 1978-08-25 1978-08-25 Demodulator for four-phase PSK microwave system - adjusts phase offset of carrier to improve system error rate at particular carrier-to-noise ratio

Publications (2)

Publication Number Publication Date
FR2434515A1 true FR2434515A1 (en) 1980-03-21
FR2434515B1 FR2434515B1 (en) 1984-12-14

Family

ID=9212094

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7824706A Granted FR2434515A1 (en) 1978-08-25 1978-08-25 Demodulator for four-phase PSK microwave system - adjusts phase offset of carrier to improve system error rate at particular carrier-to-noise ratio

Country Status (1)

Country Link
FR (1) FR2434515A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2216259A1 (en) * 1972-04-05 1973-10-18 Licentia Gmbh CIRCUIT ARRANGEMENT FOR DERIVING THE CARRIER FREQUENCY FROM THE RECEIVED SIGNALS IN A FOUR-PHASE DEMODULATOR

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2216259A1 (en) * 1972-04-05 1973-10-18 Licentia Gmbh CIRCUIT ARRANGEMENT FOR DERIVING THE CARRIER FREQUENCY FROM THE RECEIVED SIGNALS IN A FOUR-PHASE DEMODULATOR

Also Published As

Publication number Publication date
FR2434515B1 (en) 1984-12-14

Similar Documents

Publication Publication Date Title
GB1506352A (en) Digital detection system for differential phase shift keyed signals
KR890702350A (en) Receiving method and receiving antenna system executing the method
GB1534380A (en) Communications system
MY126348A (en) Arrangement in a communication system
IE792125L (en) Clock rate recovery circuit
FR2434515A1 (en) Demodulator for four-phase PSK microwave system - adjusts phase offset of carrier to improve system error rate at particular carrier-to-noise ratio
US4757272A (en) Four phase PSK demodulator
GB2001218A (en) Improvements in phase shift keyed systems
JPS5419641A (en) Fm demodulation circuit by phase tracking loop system
JPS5575379A (en) Multiple signal demodulator
JPS54133812A (en) Phase synchronous circuit
JPS5634203A (en) Fm demodulator
CA2314879A1 (en) Digital demodulator
JPS57140057A (en) Demodulating system for phase displacement modulation signal
JPS57140058A (en) Demodulation system for phase displacement modulation signal
JPS57162560A (en) Reproducing circuit of demodulating carrier wave
JPS5335495A (en) Signal detector
JPS5434747A (en) Fm demodulation circuit of phase tracking loop system
SU819984A1 (en) Signal demodulator with double phase manipulation
JPS56116336A (en) Overall duplicate communication system
JPS57129044A (en) Space diversity receiving system
JPS6446351A (en) Digital signal receiver
JPS5347758A (en) Demodulation circuit for phase displacement modulation signal
JPS57199351A (en) Multiple signal receiver
FR2285761A1 (en) PHASE REGULATION CIRCUIT FROM THE CARRIER TO THE TRANSMISSION OF A DATA SIGNAL

Legal Events

Date Code Title Description
ST Notification of lapse