Title:
DOPPLER COMPENSATION SYSTEM AND DOPPLER COMPENSATION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/107195
Kind Code:
A1
Abstract:
One embodiment of the present invention is a Doppler compensation system comprising: a sound wave reception element for receiving a sound wave transmitted by a transmitter; a ground-speed-related quantity acquisition unit for acquiring, on the basis of the acceleration of a receiver provided with the sound wave reception element, a ground-speed-related quantity that is a physical quantity relating to a vector representing the ground speed of the receiver; an extraction unit for extracting a sound wave that includes an estimation subject sound wave, among sound waves received by the receiver, that is to be estimated; an arrival direction estimation unit for estimating the arrival direction of the estimation object sound wave on the basis of the estimation object sound wave; a reception-direction-speed-related quantity estimation unit for estimating, on the basis of the ground-speed-related quantity and the result of estimation by the arrival direction estimation unit, a quantity relating to the speed in a reception direction in which the estimation object sound wave arrives, as seen from the receiver; and a Doppler compensation unit for compensating for any distortion of the waveform of the estimation object sound wave due to Doppler effects, on the basis of the result of estimation by the reception-direction-speed-related quantity estimation unit.
Inventors:
OIWA MIHARU (JP)
TSUBAKI TOSHIMITSU (JP)
FUKUMOTO HIROYUKI (JP)
FUJINO YOSUKE (JP)
NAKANO MARINA (JP)
ITO YUYA (JP)
TSUBAKI TOSHIMITSU (JP)
FUKUMOTO HIROYUKI (JP)
FUJINO YOSUKE (JP)
NAKANO MARINA (JP)
ITO YUYA (JP)
Application Number:
PCT/JP2020/042768
Publication Date:
May 27, 2022
Filing Date:
November 17, 2020
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04B11/00
Foreign References:
| CN111431823A | 2020-07-17 | |||
| CN107317781A | 2017-11-03 |
Other References:
ZENG RONG, WANG YUJIE: "Orthogonal Angle Domain Subspace Projection-Based Receiver Algorithm for Underwater Acoustic Communication", IEEE COMMUNICATIONS LETTERS, vol. 22, no. 5, 1 May 2018 (2018-05-01), US , pages 1102 - 1105, XP055939892, ISSN: 1089-7798, DOI: 10.1109/LCOMM.2018.2811460
YOSHIZAWA SHINGO, SAITO TAKASHI, MABUCHI YUSAKU, TSUKUI TOMOYA, SAWADA SHINICHI: "Parallel Resampling of OFDM Signals for Fluctuating Doppler Shifts in Underwater Acoustic Communication", JOURNAL OF ELECTRICAL AND COMPUTER ENGINEERING, vol. 2018, 4 November 2018 (2018-11-04), pages 1 - 11, XP055939916, ISSN: 2090-0147, DOI: 10.1155/2018/3579619
FUKUMOTO, HIROYUKI; FUJINO, YOSUKE; NAKANO, MARINA; TSUBAKI, TOSHIMITSU; SAKAMOTO, KAZUMITSU: "A study on spatio-temporal equalization for high speed underwater acoustic communications", IEICE TECHNICAL REPORT, vol. 119, no. 296 (RCS2019-233), 13 November 2019 (2019-11-13), JP , pages 169 - 174, XP009537447, ISSN: 0913-5685
OIWA, MIHARU ET AL.: "A study of higher-order Doppler compensation using accelerometer for underwater acoustic communication", IEICE TECHNICAL REPORT, vol. 120, no. 248, 18 November 2020 (2020-11-18), JP , pages 96 - 100, XP009537449, ISSN: 2432-6380
YOSHIZAWA SHINGO, SAITO TAKASHI, MABUCHI YUSAKU, TSUKUI TOMOYA, SAWADA SHINICHI: "Parallel Resampling of OFDM Signals for Fluctuating Doppler Shifts in Underwater Acoustic Communication", JOURNAL OF ELECTRICAL AND COMPUTER ENGINEERING, vol. 2018, 4 November 2018 (2018-11-04), pages 1 - 11, XP055939916, ISSN: 2090-0147, DOI: 10.1155/2018/3579619
FUKUMOTO, HIROYUKI; FUJINO, YOSUKE; NAKANO, MARINA; TSUBAKI, TOSHIMITSU; SAKAMOTO, KAZUMITSU: "A study on spatio-temporal equalization for high speed underwater acoustic communications", IEICE TECHNICAL REPORT, vol. 119, no. 296 (RCS2019-233), 13 November 2019 (2019-11-13), JP , pages 169 - 174, XP009537447, ISSN: 0913-5685
OIWA, MIHARU ET AL.: "A study of higher-order Doppler compensation using accelerometer for underwater acoustic communication", IEICE TECHNICAL REPORT, vol. 120, no. 248, 18 November 2020 (2020-11-18), JP , pages 96 - 100, XP009537449, ISSN: 2432-6380
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
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