JPS5574475A - Receiver for hyperbolic navigation - Google Patents

Receiver for hyperbolic navigation

Info

Publication number
JPS5574475A
JPS5574475A JP14763278A JP14763278A JPS5574475A JP S5574475 A JPS5574475 A JP S5574475A JP 14763278 A JP14763278 A JP 14763278A JP 14763278 A JP14763278 A JP 14763278A JP S5574475 A JPS5574475 A JP S5574475A
Authority
JP
Japan
Prior art keywords
oscillator
phase
voltage control
intermediate frequency
receiver
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
JP14763278A
Other languages
Japanese (ja)
Inventor
Kazuo Tsukada
Kazuhisa Iwamura
Yoshikazu Hori
Yoshiharu Kanzaki
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP14763278A priority Critical patent/JPS5574475A/en
Publication of JPS5574475A publication Critical patent/JPS5574475A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/08—Systems for determining direction or position line
    • G01S1/20—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems
    • G01S1/30—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems the synchronised signals being continuous waves or intermittent trains of continuous waves, the intermittency not being for the purpose of determining direction or position line and the transit times being compared by measuring the phase difference
    • G01S1/306—Analogous systems in which frequency-related signals (harmonics) are compared in phase, e.g. DECCA systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

PURPOSE:To make it possible to integrate circuits and furthermore to economize the receiver using a single set of voltage control quartz oscillator by carrying out the phase detection due to the digital treatment. CONSTITUTION:A voltage control quartz oscillator 127 is controlled by phase comparison of a master station intermediate frequency signal and a frequency dividing output signal of a reference oscillator 100. The reference oscillator 100 is phase synchronized directly with the received signal. The voltage control quarty oscillator 127 as a local oscillator carries out heterodyning of received signals of the master station and respective suboffices, and lowers the intermediate frequency. By lowering the intermediate frequency, the operating frequencies of phase tracking filters 102 through 104 and phase difference circuits 108 through 110 are all rendered into several MHz or less, and the intergration is facilitated.
JP14763278A 1978-11-29 1978-11-29 Receiver for hyperbolic navigation Pending JPS5574475A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14763278A JPS5574475A (en) 1978-11-29 1978-11-29 Receiver for hyperbolic navigation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14763278A JPS5574475A (en) 1978-11-29 1978-11-29 Receiver for hyperbolic navigation

Publications (1)

Publication Number Publication Date
JPS5574475A true JPS5574475A (en) 1980-06-05

Family

ID=15434712

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14763278A Pending JPS5574475A (en) 1978-11-29 1978-11-29 Receiver for hyperbolic navigation

Country Status (1)

Country Link
JP (1) JPS5574475A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2519209A1 (en) * 1981-12-29 1983-07-01 Fujitsu Ltd DIGITAL LOOP FILTER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2519209A1 (en) * 1981-12-29 1983-07-01 Fujitsu Ltd DIGITAL LOOP FILTER

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