Title:
BASE STATION, PHASE CONTROL DEVICE, COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2023/189369
Kind Code:
A1
Abstract:
Provided is a communication system in which, when a base station employs a plurality of linearly polarized antennas for radio communication with a radio relay device, the communication system is capable of suppressing variations in reception power of a known signal from the base station resulting from attitude changes of the radio relay device, enabling appropriate gain control of a power amplifier of the radio relay device based on the reception power of the known signal. The base station comprises: a plurality of antenna devices including a plurality of linearly polarized antennas capable of transmitting and receiving radio waves having mutually different linear polarization plane angles when performing feeder link communication with the radio relay device; and a base station processing unit or an externally attached phase control device for controlling a phase difference between a plurality of transmission signals fed to the plurality of linearly polarized antennas, for a predetermined time slot in which a predetermined known signal capable of being used for gain control of a power amplifier of the radio relay device is being transmitted to the radio relay device, such that combined polarization of the radio waves of the known signal transmitted from the antenna device to the radio relay device is circular polarization or elliptical polarization.
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Inventors:
HASEGAWA TAKUYA (JP)
OTA YOSHICHIKA (JP)
KONISHI MITSUKUNI (JP)
NAGATE ATSUSHI (JP)
OTA YOSHICHIKA (JP)
KONISHI MITSUKUNI (JP)
NAGATE ATSUSHI (JP)
Application Number:
PCT/JP2023/009115
Publication Date:
October 05, 2023
Filing Date:
March 09, 2023
Export Citation:
Assignee:
SOFTBANK CORP (JP)
International Classes:
H04B7/155; H04B7/185; H04W16/26; H04W52/52
Foreign References:
| JP2012151671A | 2012-08-09 | |||
| US20110193652A1 | 2011-08-11 |
Other References:
TAKUYA HASEGAWA, MITSUKUNI KONISHI, YOSHIMOTO OTA, ATSUSHI NAGATE: "B-17-1 A Basic Study on Automatic Gain Control in 5G HAPS Repeater System", PROCEEDINGS OF THE 2022 IEICE GENERAL CONFERENCE; 2022.03.15-18, IEICE, JP, 1 March 2022 (2022-03-01) - 18 March 2022 (2022-03-18), JP, pages 495, XP009549877
Attorney, Agent or Firm:
KURODA Hisashi et al. (JP)
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