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    • 1. 发明授权
    • Methods and apparatus for obtaining accurate GNSS time in a GNSS receiver
    • 用于在GNSS接收机中获得准确GNSS时间的方法和装置
    • US07969355B2
    • 2011-06-28
    • US12580231
    • 2009-10-15
    • Kung-Shuan HuangMing-Hung Li
    • Kung-Shuan HuangMing-Hung Li
    • G01S19/23
    • G01S19/39G01S19/23G04R20/04
    • A method for obtaining GNSS time in a GNSS receiver includes: deriving a relationship between a first clock signal and the received GNSS time; latching a second clock signal and the first clock signal at a first latching point to obtain a clock value A1 of the first clock signal and a clock value B1 of the second clock signal; calculating a GNSS time C1 corresponding to the clock value A1 according to the relationship; latching the first clock signal and the second clock signal at a second latching point to obtain a clock value A2 of the first clock signal and a clock value B2 of the second clock signal; and calculating a GNSS time C2 corresponding to the clock value A2 according to the GNSS time C1, the clock value B1, and the clock value B2.
    • 一种用于在GNSS接收机中获得GNSS时间的方法包括:导出第一时钟信号与接收的GNSS时间之间的关系; 在第一锁存点锁存第二时钟信号和第一时钟信号以获得第一时钟信号的时钟值A1和第二时钟信号的时钟值B1; 根据关系计算与时钟值A1对应的GNSS时间C1; 在第二锁存点处锁存第一时钟信号和第二时钟信号以获得第一时钟信号的时钟值A2和第二时钟信号的时钟值B2; 并根据GNSS时间C1,时钟值B1和时钟值B2计算与时钟值A2对应的GNSS时间C2。
    • 2. 发明授权
    • Cold start satellite search method
    • 冷启动卫星搜索方法
    • US07796084B2
    • 2010-09-14
    • US12563106
    • 2009-09-18
    • Kun-tso ChenKung-shuan Huang
    • Kun-tso ChenKung-shuan Huang
    • G01S1/00
    • G01S19/28
    • A method for searching satellites in a cold start state. The method of the present invention, a first satellite, which is predetermined or randomly selected, is searched. Then, a second satellite to be searched is selected according to the searching result (hit or missed) for the first satellite and respective interrelationships between the first satellite and the other satellites. In practice, an initial weight factor table is provided. Depending on the searching result, the initial weight factor table is updated according to the interrelationships between the satellites during searching. By using the method of the present invention, the time-to-first-fix (TTFF) can be reduced to a shorter period of time so as to provide a rapid cold start satellite positioning.
    • 一种用于在冷启动状态下搜索卫星的方法。 搜索本发明的方法,即预先确定或随机选择的第一卫星。 然后,根据第一卫星的搜索结果(命中或错过)以及第一卫星与其他卫星之间的相互关系来选择要搜索的第二卫星。 在实践中,提供了初始权重因子表。 根据搜索结果,初始权重因子表根据搜索期间卫星之间的相互关系进行更新。 通过使用本发明的方法,可以将时间到第一固定(TTFF)减少到更短的时间段,以便提供快速的冷启动卫星定位。
    • 3. 发明授权
    • Method and apparatus for collecting subframes of satellite navigation data
    • 用于收集卫星导航数据子帧的方法和装置
    • US07636060B2
    • 2009-12-22
    • US11620303
    • 2007-01-05
    • Kuan-i LiKung-shuan HuangKun-tso Chen
    • Kuan-i LiKung-shuan HuangKun-tso Chen
    • G01S1/00
    • H04L1/08G01S19/24
    • A method and apparatus for collecting subframes of navigation data of satellites are disclosed. In the method of the present invention, the subframe is divided into several sub-units, each sub-units includes one or more words. When a receiver receives a subframe with a subframe ID, the respective required sub-units of the subframe are checked. A dummy sub-unit is not necessary to be considered. Valid ones of the required sub-units are collected. If not all the required sub-units of the subframe have been collected, the absent sub-units are to be collected when the next subframe with the same subframe ID is received. Some protection schemes can be applied to raise the reliability of such sub-unit collection. Especially when the signal is weak or unstable, the present invention may significantly improve the TTFF (Time To First Fix) performance of the receiver.
    • 公开了一种收集卫星导航数据子帧的方法和装置。 在本发明的方法中,子帧被分成若干子单元,每个子单元包括一个或多个单词。 当接收器接收到具有子帧ID的子帧时,检查子帧的各个所要求的子单元。 虚拟子单元不需要考虑。 收集有效的所需子单位。 如果不是所有子帧的所有子单元被收集,则当接收到具有相同子帧ID的下一个子帧时,将不存在缺少的子单元。 可以采用一些保护方案来提高这种子单元收集的可靠性。 特别是当信号较弱或不稳定时,本发明可以显着改善接收机的TTFF(首次修复时间)性能。
    • 4. 发明授权
    • Methods and apparatus for obtaining accurate GNSS time in a GNSS receiver
    • 用于在GNSS接收机中获得准确GNSS时间的方法和装置
    • US07629924B2
    • 2009-12-08
    • US11850684
    • 2007-09-06
    • Kung-Shuan HuangMing-Hung Li
    • Kung-Shuan HuangMing-Hung Li
    • G01S1/00G01C21/00
    • G01S19/39G01S19/23G04R20/04
    • A method for obtaining GNSS time in a GNSS receiver includes: deriving a relationship between a first clock signal and the received GNSS time; latching a second clock signal and the first clock signal at a first latching point to obtain a clock value A1 of the first clock signal and a clock value B1 of the second clock signal; calculating a GNSS time C1 corresponding to the clock value A1 according to the relationship; latching the first clock signal and the second clock signal at a second latching point to obtain a clock value A2 of the first clock signal and a clock value B2 of the second clock signal; and calculating a GNSS time C2 corresponding to the clock value A2 according to the GNSS time C1, the clock value B1, and the clock value B2. For example, the aforementioned values A1, B1, C1, B2, and C2 represent values such as TTick1, RTC1, TOW1, RTC2, and TOW2, respectively.
    • 一种用于在GNSS接收机中获得GNSS时间的方法包括:导出第一时钟信号与接收的GNSS时间之间的关系; 在第一锁存点锁存第二时钟信号和第一时钟信号以获得第一时钟信号的时钟值A1和第二时钟信号的时钟值B1; 根据关系计算与时钟值A1对应的GNSS时间C1; 在第二锁存点处锁存第一时钟信号和第二时钟信号以获得第一时钟信号的时钟值A2和第二时钟信号的时钟值B2; 并根据GNSS时间C1,时钟值B1和时钟值B2计算与时钟值A2对应的GNSS时间C2。 例如,上述值A1,B1,C1,B2和C2分别表示诸如TTick1,RTC1,TOW1,RTC2和TOW2之类的值。
    • 5. 发明授权
    • Satellite search method
    • 卫星搜索方式
    • US07612714B2
    • 2009-11-03
    • US11392976
    • 2006-03-28
    • Kun-tso ChenKung-shuan Huang
    • Kun-tso ChenKung-shuan Huang
    • G01S1/00
    • G01S19/28
    • A method for searching satellites in a cold start state. The method of the present invention, a first satellite, which is predetermined or randomly selected, is searched. Then, a second satellite to be searched is selected according to the searching result (hit or missed) for the first satellite and respective interrelationships between the first satellite and the other satellites. In practice, an initial weight factor table is provided. Depending on the searching result, the initial weight factor table is updated according to the interrelationships between the satellites during searching. By using the method of the present invention, the time-to-first-fix (TTFF) can be reduced to a shorter period of time so as to provide a rapid cold start satellite positioning.
    • 一种用于在冷启动状态下搜索卫星的方法。 搜索本发明的方法,即预先确定或随机选择的第一卫星。 然后,根据第一卫星的搜索结果(命中或错过)以及第一卫星与其他卫星之间的相互关系来选择要搜索的第二卫星。 在实践中,提供了初始权重因子表。 根据搜索结果,初始权重因子表根据搜索期间卫星之间的相互关系进行更新。 通过使用本发明的方法,可以将时间到第一固定(TTFF)减少到更短的时间段,以便提供快速的冷启动卫星定位。
    • 10. 发明申请
    • METHODS AND APPARATUSES FOR SEARCHING FOR SATELLITE SIGNALS
    • 搜索卫星信号的方法和设备
    • US20090002233A1
    • 2009-01-01
    • US11769687
    • 2007-06-27
    • Kung-Shuan HuangWen-Cheng LaiHsin-Chung Yeh
    • Kung-Shuan HuangWen-Cheng LaiHsin-Chung Yeh
    • H04B7/185
    • G01S19/27
    • Methods and apparatuses for searching for satellite signals are provided. One of the proposed methods of searching for satellite signals includes: searching for satellite signals according to measurement predictions; searching for satellite signals of a reference satellite without referring to the measurement predictions; determining if measurements derived from the reference satellite are consistent with the measurement predictions; and searching for satellite signals of other satellites without referring to the measurement predictions if the measurements derived from the reference satellite are determined to be inconsistent with the measurement predictions. If the measurements derived from the reference satellite are determined to be inconsistent with the measurement predictions, navigation information for use in the generation of the measurement predictions is determined to be stale.
    • 提供了搜索卫星信号的方法和装置。 所提出的搜索卫星信号的方法之一包括:根据测量预测搜索卫星信号; 在不参考测量预测的情况下搜索参考卫星的卫星信号; 确定从参考卫星得到的测量是否与测量预测一致; 并且如果确定从参考卫星导出的测量结果与测量预测不一致,则不参考测量预测来搜索其他卫星的卫星信号。 如果从参考卫星得到的测量结果与测量预测不一致,则用于生成测量预测的导航信息被确定为过时的。