Title:
COMMUNICATION DEVICE AND COMMUNICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2019/078348
Kind Code:
A1
Abstract:
The present invention eliminates a period during which communication with a communication partner cannot be performed at the time of switching to a communication line relayed by a different satellite. This communication device is provided with: a receiving antenna 2 comprising a plurality of element receiving antennas 1 which receive radio waves and output element reception signals, respectively; an element reception signal processing unit 5 which outputs signals obtained by processing a plurality of element reception signals and received from two electronically and independently changeable directions; a transmitting antenna 4 comprising a plurality of element transmitting antennas 3 to which element transmission signals are inputted and which transmit radio waves, respectively; an element transmission signal generation unit 6 which generates element transmission signals capable of transmitting radio waves in two electronically and independently changeable directions; two modulation/demodulation units 8A, 8B which modulate and demodulate signals transmitted and received by two communication lines, respectively; and a control unit 11. The communication device operates while switching between a search mode in which communication is performed while a main satellite is being tracked, and directions in which beacon signals transmitted by satellites can be received are searched for in a search range, and a two-line mode in which communication is performed while a sub-satellite and the main satellite that have been detected in the search mode are being tracked, respectively.
Inventors:
YAMAMOTO KATSUYUKI (JP)
Application Number:
PCT/JP2018/038976
Publication Date:
April 25, 2019
Filing Date:
October 19, 2018
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H04W4/40; H04B7/185; H04W84/06
Foreign References:
| US20160373991A1 | 2016-12-22 | |||
| US20080044187A1 | 2008-02-21 | |||
| JP2001127682A | 2001-05-11 | |||
| JP2005223587A | 2005-08-18 | |||
| JP2015180026A | 2015-10-08 |
Other References:
See also references of EP 3700102A4
Attorney, Agent or Firm:
MURAKAMI, Kanako et al. (JP)
Download PDF: