Title:
FREQUENCY SYNCHRONIZATION DEVICE AND FREQUENCY SYNCHRONIZATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2016/170932
Kind Code:
A1
Abstract:
The purpose of the present invention is to obtain a frequency synchronization device capable of frequency synchronization between modules without using a GPS signal.
This frequency synchronization device is provided with: a voltage-controlled oscillator which changes the frequency of an oscillation signal by controlled voltage and outputs the oscillation signal; a mixer to which the oscillation signal the frequency of which is shifted by the Doppler effect is inputted as a return signal, and which mixes the return signal and the oscillation signal outputted by the voltage-controlled oscillator; a frequency divider which divides the frequency of a mixed signal resulting from mixing by the mixer; a phase frequency comparator to which a reference signal the frequency of which is shifted by the Doppler effect is inputted, and which compares the phase of the reference signal and the phase of the mixed signal the frequency of which is divided by the frequency divider, and outputs a current corresponding to a phase difference; and a loop filter which converts the current outputted by the phase frequency comparator into voltage, and outputs the voltage as the controlled voltage of the voltage-controlled oscillator.
Inventors:
NAKAMURA KEISUKE (JP)
MIZUTANI HIROYUKI (JP)
TAJIMA KENICHI (JP)
WADA OSAMU (JP)
HIEDA MORISHIGE (JP)
MIZUTANI HIROYUKI (JP)
TAJIMA KENICHI (JP)
WADA OSAMU (JP)
HIEDA MORISHIGE (JP)
Application Number:
PCT/JP2016/060025
Publication Date:
October 27, 2016
Filing Date:
March 29, 2016
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H03L7/185; G01S7/28; G01S7/40; G01S13/46
Foreign References:
| JP2010122050A | 2010-06-03 | |||
| JP2002330068A | 2002-11-15 | |||
| JPH01106648A | 1989-04-24 |
Other References:
VINCENT FUSCO ET AL.: "Analysis and Characterization of PLL-Based Retrodirective Array", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. 53, no. 2, February 2005 (2005-02-01), pages 730 - 738, XP011126873
Attorney, Agent or Firm:
INABA, Tadahiko et al. (JP)
Tadahiko Inaba (JP)
Tadahiko Inaba (JP)
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