Underwater communication method
    21.
    发明授权

    公开(公告)号:US11601205B2

    公开(公告)日:2023-03-07

    申请号:US16064750

    申请日:2016-11-08

    Abstract: The present invention relates to an underwater communication method capable of communicating with a plurality of sensor nodes within a limited frequency band. Underwater information communication of the present invention allocates an appropriate frequency to each sensor node according to the distance between a central node and the plurality of sensor nodes, and then, controls underwater communication between the central node and the plurality of sensor nodes using the allocated frequency. By virtue of such control, the present invention prevents the occurrence of an unusable sensor node which cannot smoothly perform underwater communication when the allocated frequency is unreasonable. Therefore, the present invention has the effect of enabling efficient underwater communication between a plurality of sensor nodes and a central node.

    Method and apparatus for sending signal of underwater communication

    公开(公告)号:US11012989B2

    公开(公告)日:2021-05-18

    申请号:US16488100

    申请日:2018-01-12

    Abstract: The present invention relates to underwater communication and, more particularly to a signal transmission method and device which configure and transmit physical channel information such that low-power control is performed in underwater communication. The present invention configures the physical channel information such that a reception node side can check through a combination of preambles whether a signal is provided to itself, when forward direction communication is performed in a centralized underwater communication network. Therefore, the present invention performs the control such that only a relevant reception node requiring data reception performs a demodulation operation, without requiring all reception nodes to always perform demodulation in a forward direction communication process. Through this process, many reception nodes do not perform unnecessary demodulation operations in the forward direction communication process, thereby providing an effect of preventing unnecessary power consumption.

    Scan driver
    28.
    发明申请

    公开(公告)号:US20250124844A1

    公开(公告)日:2025-04-17

    申请号:US18628919

    申请日:2024-04-08

    Abstract: The present invention relates to a scan drive circuit and, more specifically, to a scan drive circuit that is insensitive to changes in the characteristics of transistors, enabling stable operation even when such changes occur within a certain range. Accordingly, the scan drive circuit provides the advantage of high yield when applied not only to conventional rigid substrates but also to flexible or stretchable substrates.
    According to the present invention, a scan drive circuit is provided that operates normally regardless of whether the transistor exhibits enhancement-type or depletion-type characteristics, thereby eliminating the need to modify the circuit or employ complex designs based on the characteristics of the transistors.

    LOCATION ESTIMATION DEVICE AND METHOD FOR ESTIMATING LOCATION OF TRANSMITTING DEVICE UNDER WATER

    公开(公告)号:US20250076447A1

    公开(公告)日:2025-03-06

    申请号:US18370727

    申请日:2023-09-20

    Abstract: A transmitting device location estimation device and a transmitting device location estimation method for estimating the location of a transmitting device under water are disclosed. A transmitting device location estimation device, in a transmitting device location estimation device for estimating the location of a transmitting device under water, is characterized by comprising: a distance location estimation unit that estimates the distance and location of the transmitting device based on the time taken to receive the transmission signal transmitted by the transmitting device and the speed of the transmission signal; a direction estimation unit that estimates the direction of the transmitting device; and an estimated location confirmation unit that confirms the estimated location of the transmitting device based on the estimated distance and location of the transmitting device and the estimated direction of the transmitting device.

    Method for providing enhanced search result by fusioning more than two information retrievals

    公开(公告)号:US20250021594A1

    公开(公告)日:2025-01-16

    申请号:US18901236

    申请日:2024-09-30

    Abstract: A method is presented for enhancing search results by segmenting documents into smaller passages and utilizing those passages as the search unit. This method integrates the passage rankings from two search models to produce a new document ranking and arranges the documents accordingly. The ranking of document is also rearranged based on the proportion of passages taken from the same document versus the total number of passages in that document. The final search ranking system combines document-level and passage-level search rankings to rank documents. This method ensures that when conducting a passage search, the search results consider the general relevance of the entire document, which leads to better performance compared to searching only by document-level or passage-level searches.

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