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1.发明申请
公开(公告)号：WO2023079406A1
公开(公告)日：2023-05-11
申请号：PCT/IB2022/060206
申请日：2022-10-24
Inventor： ALOUINI, Mohamed-Slim , OOI, Boon Siew , SAIT, Mohammed Adnan , TRICHILI, Abderrahmen
Abstract: An optical wireless underwater receiver (300) includes a housing (302) configured to be transparent to light; a first scintillating fiber (304) attached to an interior wall of the housing (302); a first photodetector (320) optically coupled to both ends of the first scintillating fiber (304); a second scintillating fiber (306) attached to the interior wall of the housing (302); and a second photodetector (322) optically coupled to both ends of the second scintillating fiber (306). The first scintillating fiber (304) is configured to receive a signal at a different wavelength than the second scintillating fiber (306).
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2.发明申请
公开(公告)号：WO2022063657A1
公开(公告)日：2022-03-31
申请号：PCT/EP2021/075397
申请日：2021-09-15
Applicant: ATLAS ELEKTRONIK GMBH , THYSSENKRUPP AG
Inventor： CHRISTENSEN, Jesper
Abstract: A waterborne sound receiver is disclosed, comprising a receiving unit and a decoder. The receiving unit is configured to receive a waterborne sound signal comprising compressed image data having a first resolution and to convert the waterborne sound signal into a data stream. The decoder is configured to decode the data stream as to obtain the compressed image data. The decoder is further configured to upsample the image data as to obtain image data having a second resolution which is higher than the first resolution, wherein the decoder is implemented as a neural network.
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公开(公告)号：WO2021248784A1
公开(公告)日：2021-12-16
申请号：PCT/CN2020/125523
申请日：2020-10-30
Applicant: 华南理工大学
Abstract: 本发明公开了一种基于交叉子带划分的多带双曲调频扩频通信方法。本方案提出将水声系统可用带宽按照当前扩频周期序号的奇偶性进行不同子带数量的多带划分，以达到交叉子带划分的目的。在此基础上，将划分的多个子带两两分组，每个分组采用子带选择激活的方式根据传输数据的不同进行子带的选择，实现多带并行传输。同时，每个扩频周期内，被激活子带分别采用升、降双曲调频信号对调制后的信号进行调频。相对于其他水声双曲扩频调频方案，本发明采用交叉子带划分的方案，提高了对信道最大时延的容忍度；利用升、降双曲调频信号的弱相关性，承载传输不同的信息；采取基于QPSK调制的多带并行传输方案，进一步提高了系统的频带利用率与传输速率。
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公开(公告)号：WO2021016862A1
公开(公告)日：2021-02-04
申请号：PCT/CN2019/098379
申请日：2019-07-30
Applicant: 深圳先进技术研究院
Abstract: 本申请适用于计算机应用技术领域，提供了水下通信方法及装置，包括：通过生成待发送的电信号信息；根据预设的涡旋声场产生方式，确定所述电信号信息对应的涡旋声场信号的发射信息；根据所述涡旋声场信号的发射信息，将所述电信号信息通过预设的激励换能器，产生所述涡旋声场信号；将所述涡旋声场信号发送至预设的接收装置。通过根据预设的涡旋声场产生方式，确定电信号信息对应的涡旋声场信号的发射信息，通过预设的水下面阵换能器产生或接收任意涡旋声场，实现涡旋声通讯的核心声场传播，降低了水下传输的信号在编解码过程中的失真。
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公开(公告)号：WO2020204849A1
公开(公告)日：2020-10-08
申请号：PCT/TR2019/050224
申请日：2019-04-05
Applicant: OZYEGIN UNIVERSITESI
Inventor： CIVANLAR, Mehmet Reha , UYSAL, Murat
IPC: H04B10/116 , H04B13/02
Abstract: The present invention relates to an underwater communication system that is capable of increasing data transmission through the visible light between the surface and underwater of the swimming pool and an underwater communication method providing data transmission between the surface and underwater of the swimming pool.
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Patent Agency Ranking6.发明申请
公开(公告)号：WO2020149905A1
公开(公告)日：2020-07-23
申请号：PCT/US2019/056640
申请日：2019-10-17
Applicant: THE GOVERNMENT OF THE UNITES STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF THE NAVY
Inventor： LIU, Zhiqiang
IPC: H04L27/26 , H04B11/00 , H04B13/02 , H04B1/7163
Abstract: A communication system includes a repetitive orthogonal frequency-division multiplexing ("ROFDM") transmitter communicating with an ROPDM receiver. The ROFDM transmitter includes an ROFDM modulator, which includes a K-point Fast Fourier Transform receiving a block of time- domain data symbols and generating an initial orthogonal frequency-division multiplexing symbol. The initial orthogonal frequency-division multiplexing symbol is based on a block of frequency- domain data symbols corresponding to the block of time-domain data symbols. The initial orthogonal ffequency-division multiplexing symbol includes an ending part. The ROFDM modulator includes an orthogonal frequency-division multiplexing symbol repeater generating a repetitive orthogonal frequency-division multiplexing symbol by repeatedly reproducing the initial orthogonal frequency- division multiplexing symbol. The modulator includes a cyclic prefix adder prepending a cyclic prefix to the repetitive orthogonal frequency-division multiplexing symbol to generate a baseband transmitted signal. The cyclic prefix includes the ending part of the initial orthogonal frequency- division multiplexing symbol The ROFDM receiver includes an ROFDM demodulator.
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公开(公告)号：WO2020113464A1
公开(公告)日：2020-06-11
申请号：PCT/CN2018/119347
申请日：2018-12-05
Applicant: 唐山照澜海洋科技有限公司 , 北京控制与电子技术研究所
Abstract: 本发明涉及一种5G多载波(广义频分复用)水声通信方法，属于水声通信领域，涉及广义频分复用(GFDM，Generalized Frequency Division Multiplexing)水声通信技术。本发明提出了一种适用于水声领域的GFDM通信系统，包括系统整体实现及发射端和接收端结构，实现了在带宽资源有限的水声信道中，子块和子载波数目的灵活选择，提高了频谱利用率。并且GFDM技术具有更低的峰均比，使其更适用于多为电池供电的水声系统中，能够更为有效的利用能量。本发明的目的是针对信道带宽资源有限的水声通信领域，提供一种有效利用信道资源和零散频谱资源的方法，可促进未来水下组网技术的发展。
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公开(公告)号：WO2019108184A1
公开(公告)日：2019-06-06
申请号：PCT/US2017/063786
申请日：2017-11-29
Applicant: HALLIBURTON ENERGY SERVICES, INC.
Abstract: The disclosure is directed to a well system environment communication system comprising of an acoustic communicator capable of communicating encoded data with a first wireless transceiver through a fluid medium and the first wireless transceiver capable of communicating encoded data with a second transceiver through a non-fluid medium. In one example, an acoustic communicator is communicatively coupled with a downhole tool allowing the downhole tool to communicate indirectly with a well system controller. In another aspect of the disclosure, a method is described wherein an acoustic communicator located in a wellbore can encode data from a downhole tool and communicate the data through a fluid medium to a first wireless transceiver and the first wireless transceiver can communicate with a second transceiver through a non-fluid medium.
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9.发明申请
公开(公告)号：WO2018219975A1
公开(公告)日：2018-12-06
申请号：PCT/EP2018/064119
申请日：2018-05-29
Applicant: KOPADIA
Inventor： RICHER DE FORGES, Hervé , GROUSSET, Thierry
Abstract: La présente invention concerne un système collaboratif de véhicules subaquatiques (10) apte à suivre un élément linéaire (1, 33) immergé capable de faire varier ou de produire un champ magnétique comprenant au moins un premier véhicule subaquatique (13, 37, 38, 39) destiné au suivi de la position de l'élément linéaire (1, 33), un deuxième véhicule subaquatique (11, 35) comprenant au moins un premier système apte à indiquer sa position et au moins un premier moyen de mesure (28) dudit champ magnétique apte à indiquer un premier angle (26) mesuré entre la verticale et une première direction (30) dudit champ magnétique, un troisième véhicule subaquatique (12, 36) comprenant au moins un deuxième système apte à indiquer sa position et au moins un deuxième moyen de mesure (29) dudit champ magnétique apte à indiquer un deuxième angle (27) mesuré entre la verticale et une deuxième direction (31) dudit champ magnétique, le premier véhicule subaquatique (13, 37, 38, 39) étant situé à la verticale ou en arrière des deuxième et troisième véhicules subaquatiques (11, 35, 12, 36), au moins un desdits véhicules subaquatiques (13, 37, 38, 39, 11, 12) comportant un moyen de calcul de ladite position dudit élément linéaire (1, 33) et le premier véhicule subaquatique (13, 37, 38, 39) étant apte à utiliser la position dudit élément linéaire (1, 33) afin de le suivre.
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公开(公告)号：WO2018199454A1
公开(公告)日：2018-11-01
申请号：PCT/KR2018/002212
申请日：2018-02-22
Applicant: 숭실대학교산학협력단
Abstract: 본 발명은 수중 자기장 통신을 위한 하이브리드 수동형-복호전달 중계 단말 및 그 중계 방법에 관한 것으로, 수중 자기장 통신을 위한 하이브리드 수동형-복호전달 중계 단말을 이용한 중계 방법에 있어서, 상기 하이브리드 수동형-복호전달 중계 단말은 송신 단말으로부터 자기 유도된 신호를 수신하는 단계, 제1 타임 슬롯 동안 상기 수신 신호를 수신 단말로 전달함과 동시에 버퍼에 저장하는 단계, 그리고 제2 타임 슬롯 동안 상기 버퍼에 저장된 신호를 복호화하고 변조하여 변조된 신호를 상기 수신 단말로 전송하는 단계를 포함한다. 본 발명에 따르면, 동적으로 변화하는 수중 환경에서 자기장 통신의 전송 거리를 확장하는 동시에 경로 손실을 감소시킴으로써, 수중 환경에서 자기장 통신의 성능을 개선시킬 수 있다.
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