Title:
水中通信システムおよび水中通信方法
Document Type and Number:
Japanese Patent JP7216520
Kind Code:
B2
Abstract:
To provide an underwater communication system capable of appropriately acquiring information based on an information signal from a received signal even if a problem occurs in the received signal due to interference, etc.SOLUTION: An underwater communication system 1 includes: a transmitter for transmitting a packet signal including a synchronization signal and an information signal into water as an ultrasonic signal; a receiver for receiving the ultrasonic signal; a synchronization signal detection unit 24 for detecting a synchronization signal from the received signal; a gate generation unit 25 for generating a gate of the information signal on the basis of a detection timing of the synchronization signal; a frequency estimation unit 27 for calculating an estimated frequency of the information signal in the gate; and a frequency correction unit 28 for correcting the estimated frequency of the information signal on the basis of a first detection timing of the synchronization signal and a second detection timing which is a detection timing prior to the first detection timing of the synchronization signal.SELECTED DRAWING: Figure 2
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Inventors:
Makoto Iwamoto
Application Number:
JP2018201632A
Publication Date:
February 01, 2023
Filing Date:
October 26, 2018
Export Citation:
Assignee:
FURUNO ELECTRIC COMPANY,LIMITED
International Classes:
H04B11/00; G01S15/08
Domestic Patent References:
| JP2006217267A | ||||
| JP2018107742A | ||||
| JP2001067094A |
Foreign References:
| US20110013487 |
Attorney, Agent or Firm:
Masano Shibano
Makoto Ohashi
Kayoko Nishitani
Makoto Ohashi
Kayoko Nishitani
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