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    • 51. 发明申请
    • ROBUST ACCURATE GPS TIME REFERENCE FOR SPACE APPLICATION
    • 可靠的精确GPS时间参考空间应用
    • WO99050618A1
    • 1999-10-07
    • PCT/US1999/005178
    • 1999-03-08
    • G01C21/00G01S1/00G01S19/05G01S19/11G01S19/21G01S19/29G01S19/46G04G7/02G01S3/02G01S5/02G06G7/00G06G7/76G06G7/78H04B7/185H04L9/00
    • G01S19/42G01C21/00G04G7/02
    • A receiver clock bias signal (13) for a spacecraft in motion is used to obtain a real-time navigation filter (14) solution of the clock bias and provide a robust accurate GPS time reference, even when there are less than four GPS satellites (9) within the view of the receiver in the spacecraft. The Kalman filter of the spacecraft provides an accurate solution of the clock bias (17), with less than four GPS satellite signals, by means of system which uses the knowledge of the dynamic motion of the satellite (4) in conjunction with GPS signals for a robust estimation of time. The system provides an accurate GPS time reference by transferring timing information from an atomic reference standard (GPS) (12) to a spacecraft in motion by directly measuring the GPS signal without depending upon the tracking of multiple GPS satellites or a static receiver. Implementation is current aerospace qualified GPS receivers, e.g., the "GPS TENSOR", and known orbital dynamics (8) are used to predict receiver position which aids in the transfer of the GPS time.
    • 用于运动中的航天器的接收器时钟偏置信号(13)用于获得时钟偏置的实时导航滤波器(14)解,并且即使当存在少于四个GPS卫星时也提供鲁棒的精确GPS时间参考 9)在航天器内的接收机的视野内。 航天器的卡尔曼滤波器通过使用卫星(4)的动态运动知识结合GPS信号的系统,提供具有小于四个GPS卫星信号的时钟偏置(17)的精确解决方案 强大的时间估计。 通过直接测量GPS信号而不依赖于多个GPS卫星或静态接收机的跟踪,通过将定时信息从原子参考标准(GPS)(12)传送到运动中的航天器来提供精确的GPS时间参考。 实施是目前的航空航天合格GPS接收机,例如“GPS TENSOR”,已知的轨道动力学(8)用于预测接收机位置,这有助于GPS时间的传送。
    • 52. 发明申请
    • RADIO LOCATION SYSTEM INCLUDING TRANSCEIVER TAGS
    • 无线电位置系统,包括收发器标签
    • WO99039219A1
    • 1999-08-05
    • PCT/US1999/001732
    • 1999-01-28
    • G01S1/04G01S5/02G01S5/04G01S5/06G01S13/76G01S13/82G01S13/87G01S19/11G06K7/00G06K17/00G01S3/02
    • G01S5/06G01S1/042G01S5/02G01S5/021G01S5/04G01S13/767G01S13/82G01S13/825G01S13/878G06K7/0008G06K7/10079G06K2017/0045
    • An asset management radio location system uses time-of-arrival differentiation for random and repetitive spread spectrum, short d uration pulse "blinks" from object-attached tags, to provide a practical, continuous identification of the location of each and every object within an environment of interest, irrespective whether the object is stationary or moving. Correlation-based RF processors (24) determine which signals received by tag transmission readers (10) are first-to-arrive signals as transmitted from any blinking tag, and an object location processor carries out time-of-arrival differentiation of these first-to-arrive transmissions from any blinking tag to determine where the respective object is located within the environment. A low power interrogation wand may be employed to refine the location of an object by a user programmed transmission - response exchange between the wand and the tag associated with the object of interest.
    • 资产管理无线电定位系统使用随机和重复扩展的时间到达差异化,短对象脉冲从对象附加的标签“闪烁”,以提供对每个对象的位置的实际连续的识别 感兴趣的环境,无论物体是静止还是移动。 基于相关的RF处理器(24)确定由标签传输读取器(10)接收的哪些信号是从任何闪烁标签发送的首先到达信号,并且对象位置处理器执行这些第一 - 从任何闪烁的标签到达传输,以确定相应对象在环境内的位置。 可以使用低功率询问棒来通过用户编程的传输来改善对象的位置 - 在与感兴趣对象相关联的标签和标签之间的响应交换。
    • 57. 发明申请
    • ZENITHAL REACTIVE JAMMER
    • WO2022097089A1
    • 2022-05-12
    • PCT/IB2021/060275
    • 2021-11-05
    • ELETTRONICA S.P.A.
    • ARDOINO, RiccardoBENVENUTI, DarioGRAZZINI, MarcoPIEZZO, MarcoTORTI, Roberto
    • G01S7/38G01S7/02G01S3/02G01S13/68
    • The invention relates to a jamming device (1) for the protection of targets on the earth's surface against radiofrequency (RF) threats of the space, satellite or air type; said jamming device (1) comprising: RF threat detection means (11), RF jamming means (12) and a control system (13). The RF threat detection means (11) include a plurality of receiving antennas (111), an RF threat detection unit (112) and one or more predefined RF-threat-related libraries (113). The receiving antennas (111) are configured to receive RF signals having elevation angles of arrival that are equal to, or greater than, a given minimum elevation angle, thereby providing an elevation angle coverage of interest. The RF threat detection unit (112) is configured to detect the presence of an RF threat based on the RF signals received by the receiving antennas (111) and on the predefined RF threat library (ies) (113) and, in case of detection of an RF threat, to: determine a respective type of the detected RF threat based on the RF signals received by the receiving antennas (111) and on the predefined RF-threat-related library (ies) (113); estimate a respective direction of arrival of the detected RF threat based on the RF signals received by the receiving antennas (111); and alert the control system (13) about the detected RF threat, providing said control system (13) with the respective type and the respective direction of arrival of said detected RF threat. Said predefined RF-threat-related library (ies) (113) contain (s) information related to one or more RF threats of interest so as to enable the RF threat detection unit (112) to detect the presence of said RF threat (s) of interest and to determine the respective type thereof based on the RF signals received by the receiving antennas (111). The control system (13) includes a control unit (131) and one or more predefined RF-jamming- actions-related libraries (132). The control unit (131) is configured, in case of detection of an RF threat by the RF threat detection unit (112), to: determine an RF jamming action to be performed against the detected RF threat based on the respective type determined by the RF threat detection unit (112) and on the predefined RF-jamming-actions-related library (ies) (132); and to operate the RF jamming means (12) so that said RF jamming means (12) perform the determined RF jamming action against the detected RF threat. Said predefined RF-jamming-actions-related library (ies) (132) contains, for each RF threat of interest inserted in the predefined RF threat library (ies) (113), respective information related to one or more respective RF jamming actions to be performed against said RF threat of interest. The RF jamming means (12) are operable by the control unit (131) in case of detection of an RF threat by the RF threat detection unit (112) and include: a plurality of transceiver antennas (121) configured to provide, also, said elevation angle coverage of interest, track the detected RF threat and transmit RF jamming signals against said detected RF threat so as to perform the RF jamming action determined by the control unit (131); and an RF jamming signal generation unit (122) configured to generate the RF jamming signals to be transmitted by the transceiver antennas (121) against the detected RF threat so as to perform said RF jamming action.
    • 59. 发明申请
    • APPARATUS, METHOD AND COMPUTER PROGRAM FOR A MOBILE TRANSCEIVER AND FOR A BASE STATION TRANSCEIVER
    • WO2020052990A1
    • 2020-03-19
    • PCT/EP2019/073134
    • 2019-08-29
    • VOLKSWAGEN AKTIENGESELLSCHAFT
    • EL ASSAAD, Ahmad
    • G01S1/04G01S3/02G01S3/04G01S5/12G01S5/02
    • The present invention relates to an apparatus, a method and a computer program for a mobile transceiver and for a base station transceiver. The method for the mobile transceiver comprises receiving a downlink signal from a base station transceiver of the mobile communication system via a downlink data channel. The downlink signal comprises one or more positioning symbols. The one or more positioning symbols comprise a first positioning symbol. At least the first positioning symbol is based on a plurality of samples in a time domain to be transmitted by the base station transceiver. The plurality of samples comprises one or more sequences of zero- value samples and one or more non-zero-value samples following the one or more sequences of zero-value samples. The method comprises identifying a line of sight component of at least the first positioning symbol of the downlink signal based on the one or more sequences of zero- value samples. The method comprises determining information related to a location of the mobile transceiver based on the one or more non-zero-value samples received within the line of sight component of the first positioning symbol. In some embodiments, the reception of the downlink signal is calibrated based on a local calibration signal transmitted during a zero-value cyclic prefix of a second positioning symbol transmitted consecutively after the first positioning symbol.