Title:
ドップラー補償システム及びドップラー補償方法
Document Type and Number:
Japanese Patent JP7397383
Kind Code:
B2
Abstract:
An aspect of the present invention is a Doppler compensation system including: a sound wave receiving element that receives a sound wave transmitted by a transmitter; a ground-speed-related quantity acquisition unit that acquires a ground-speed-related quantity that is a physical quantity related to a vector representing a ground speed of a receiver including the sound wave receiving element based on an acceleration of the receiver; an extraction unit that extracts a sound wave including an estimation target sound wave that is a sound wave to be estimated from among sound waves received by the receiver; an arrival direction estimation unit that estimates an arrival direction of the estimation target sound wave based on the estimation target sound wave; a reception-direction-speed-related quantity estimation unit that estimates a quantity related to a speed in a reception direction that is a direction in which the estimation target sound wave viewed from the receiver arrives based on the ground-speed-related quantity and a result of the estimation from the arrival direction estimation unit; and a Doppler compensation unit that compensates for waveform distortion due to Doppler effect of the estimation target sound wave based on a result of the estimation from the reception-direction-speed-related quantity estimation unit.
Inventors:
Miharu Oiwa
Toshimitsu Tsubaki
Hiroyuki Fukumoto
Yosuke Fujino
Marina Nakano
Yuya Ito
Toshimitsu Tsubaki
Hiroyuki Fukumoto
Yosuke Fujino
Marina Nakano
Yuya Ito
Application Number:
JP2022563266A
Publication Date:
December 13, 2023
Filing Date:
November 17, 2020
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
H04B11/00; H04L27/01
Foreign References:
| CN111431823A | ||||
| CN107317781A |
Other References:
ZENG Rong et al.,Orthogonal Angle Domain Subspace Projection-Based Receiver Algorithm for Underwater Acoustic Communi,IEEE Communications Letters,IEEE,2018年03月02日,Volume 22, Issue 5,pp.1102-1105,Internet
YOSHIZAWA Shingo et al.,Parallel Resampling of OFDM Signals for Fluctuating Doppler Shifts in Underwater Acoustic Communicat,Journal of Electrical and Computer Engineering,Volume 2018, Article ID 3579619,Hindawi,2018年11月04日,Internet
福本浩之 et al.,海中音響通信高速化のための時空間等化に関する検討,信学技報,一般社団法人 電子情報通信学会,2019年11月13日,vol. 119, no. 296, RCS2019-233,pp.169-174,Internet
大岩美春 et al.,水中音響通信のための加速度計を用いた高次ドップラー補償技術の検討,信学技報,一般社団法人 電子情報通信学会,2020年11月18日,vol. 120, no. 249, RCS2020-133,pp.128-132,Internet
YOSHIZAWA Shingo et al.,Parallel Resampling of OFDM Signals for Fluctuating Doppler Shifts in Underwater Acoustic Communicat,Journal of Electrical and Computer Engineering,Volume 2018, Article ID 3579619,Hindawi,2018年11月04日,Internet
福本浩之 et al.,海中音響通信高速化のための時空間等化に関する検討,信学技報,一般社団法人 電子情報通信学会,2019年11月13日,vol. 119, no. 296, RCS2019-233,pp.169-174,Internet
大岩美春 et al.,水中音響通信のための加速度計を用いた高次ドップラー補償技術の検討,信学技報,一般社団法人 電子情報通信学会,2020年11月18日,vol. 120, no. 249, RCS2020-133,pp.128-132,Internet
Attorney, Agent or Firm:
Patent Attorney Shiga International Patent Office
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