Title:
OPTICAL WIRELESS COMMUNICATION SYSTEM AND OPTICAL WIRELESS COMMUNICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/250895
Kind Code:
A1
Abstract:
This optical wireless communication system has: an optical wireless communication device that is moved together with a first optical wireless station; and a second optical wireless station that opposes the first optical wireless station. The optical wireless communication device is provided with at least one reference light transmission unit that transmits reference light to the second optical wireless station when a position forward in a movement direction of the first optical wireless station is defined as a transmission position. The second optical wireless station is provided with: a reference light reception unit that receives the reference light transmitted from the reference light transmission unit; an inference unit that infers influence of atmosphere on transfer of signal light on the basis of the reception state of the reference light received by the reference light reception unit; a compensation unit that performs a compensation process on the signal light on the basis of the influence of atmosphere inferred by the inference unit; and a signal light transmission unit that transmits the signal light on which the compensation process has been performed by the compensation unit, in an arrival direction of the reference light.
Inventors:
SAKAMOTO KAZUMITSU (JP)
KATAYAMA YOHEI (JP)
YOSHIZAWA KENTO (JP)
KINOSHITA TAKESHI (JP)
YAMAZAKI ETSUSHI (JP)
MIZUNO TAKAYUKI (JP)
OHARA TAKUYA (JP)
KATAYAMA YOHEI (JP)
YOSHIZAWA KENTO (JP)
KINOSHITA TAKESHI (JP)
YAMAZAKI ETSUSHI (JP)
MIZUNO TAKAYUKI (JP)
OHARA TAKUYA (JP)
Application Number:
PCT/JP2020/023234
Publication Date:
December 16, 2021
Filing Date:
June 12, 2020
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04B10/112
Domestic Patent References:
| WO2018212253A1 | 2018-11-22 |
Foreign References:
| JP2018121281A | 2018-08-02 | |||
| JP2000068934A | 2000-03-03 | |||
| JP2018055113A | 2018-04-05 |
Other References:
REN, Y. ET AL.: "Adaptive-optics-based simultaneous pre- and post-turbulence compensation of multiple orbital-angular-momentum beams in a bidirectional free-space optical link", OPTICA, vol. 1, no. 6, December 2014 (2014-12-01), pages 376 - 382, XP055890570
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
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