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    • 1. 发明申请
    • Delayed GeoTagging
    • 延迟地理标记
    • US20120105279A1
    • 2012-05-03
    • US12917279
    • 2010-11-01
    • James BrownMakarand PhatakWilliam Kerry Keal
    • James BrownMakarand PhatakWilliam Kerry Keal
    • G01S19/41
    • G01S19/42G01S19/14G01S19/27
    • Various methods, apparatuses, and systems for providing a delayed geotag using GPS devices are described. The GPS device includes a wireless receiver configured to receive satellite state data and satellite range measurements from a plurality of satellites, a communications interface in communication with a media device, and a position engine configured to calculate a geotag. The GPS device can be configured to receive satellite range measurements from one or more satellites at a first point in time when the satellite state data for a minimum number of the satellites is unavailable, and to calculate the satellite state data at that time using satellite state data received at a second, later point in time. The satellite state information at the first point in time is calculated using an algorithm to extrapolate the satellite state data back to the first point in time when the satellite range measurements were made. The GPS device can calculate a geotag using the calculated satellite state data at the first point in time and the corresponding satellite range measurements.
    • 描述了使用GPS设备提供延迟地理标识的各种方法,设备和系统。 GPS设备包括被配置为从多个卫星接收卫星状态数据和卫星测距的无线接收器,与媒体设备通信的通信接口以及被配置为计算地理标记的位置引擎。 GPS设备可以被配置为在卫星的最小数量的卫星状态数据不可用的第一时间点从一个或多个卫星接收卫星测距,并且使用卫星状态计算当时的卫星状态数据 在第二个时间点接收到的数据。 使用算法来计算第一时间点的卫星状态信息,以将卫星状态数据推断回到进行卫星测距的第一个时间点。 GPS设备可以使用第一时间点的计算的卫星状态数据和相应的卫星测距来计算地理标记。
    • 2. 发明授权
    • Delayed GeoTagging
    • 延迟地理标记
    • US09348031B2
    • 2016-05-24
    • US12917279
    • 2010-11-01
    • James BrownMakarand PhatakWilliam Kerry Keal
    • James BrownMakarand PhatakWilliam Kerry Keal
    • G01S19/42G01S19/14G01S19/27
    • G01S19/42G01S19/14G01S19/27
    • Various methods, apparatuses, and systems for providing a delayed geotag using GPS devices are described. The GPS device includes a wireless receiver configured to receive satellite state data and satellite range measurements from a plurality of satellites, a communications interface in communication with a media device, and a position engine configured to calculate a geotag. The GPS device can be configured to receive satellite range measurements from one or more satellites at a first point in time when the satellite state data for a minimum number of the satellites is unavailable, and to calculate the satellite state data at that time using satellite state data received at a second, later point in time. The satellite state information at the first point in time is calculated using an algorithm to extrapolate the satellite state data back to the first point in time when the satellite range measurements were made. The GPS device can calculate a geotag using the calculated satellite state data at the first point in time and the corresponding satellite range measurements.
    • 描述了使用GPS设备提供延迟地理标识的各种方法,设备和系统。 GPS设备包括被配置为从多个卫星接收卫星状态数据和卫星测距的无线接收器,与媒体设备通信的通信接口以及被配置为计算地理标记的位置引擎。 GPS设备可以被配置为在卫星的最小数量的卫星状态数据不可用的第一时间点从一个或多个卫星接收卫星测距,并且使用卫星状态计算当时的卫星状态数据 在第二个时间点接收到的数据。 使用算法来计算第一时间点的卫星状态信息,以将卫星状态数据推断回到进行卫星测距的第一个时间点。 GPS设备可以使用第一时间点的计算的卫星状态数据和相应的卫星测距来计算地理标记。
    • 5. 发明授权
    • Method and apparatus for weak data frame sync in a positioning system
    • 定位系统中弱数据帧同步的方法和装置
    • US08134501B2
    • 2012-03-13
    • US13083498
    • 2011-04-08
    • Gary LennenMakarand PhatakWilliam Kerry Keal
    • Gary LennenMakarand PhatakWilliam Kerry Keal
    • G01S19/24
    • G01S19/24G01S19/27
    • The present invention is related to location positioning systems, and more particularly, to a method and apparatus of synchronizing to data frames in a positioning system signal. According to one aspect, the invention speeds up the frame synchronization process by computing a frame synchronization metric for each satellite and then combining together the metrics for all tracked satellites together, after compensating for respective signal transit times. Then the invention makes a frame sync decision on the combined satellite metric. In embodiments, an optimal combining algorithm is used based on CNO of each satellite. According to further aspects, the invention further speeds up the frame synchronization process by predicting many bits in the subframe so that more bits are known in addition to the 8-bit preamble. For example, the invention recognizes that many bits in a subframe rarely change or don't change very often. Moreover, the invention uses old ephemeris used to predict new ephemeris parameters. These parameters are translated into predicted bits in the signal. Still further, old ephemeris can be used to predict almanac parameters, and the almanac can be used to predict ephemeris parameters.
    • 本发明涉及位置定位系统,更具体地说,涉及一种与定位系统信号中的数据帧同步的方法和装置。 根据一个方面,本发明通过计算每个卫星的帧同步度量来加速帧同步过程,然后在补偿相应的信号传送时间之后将所有跟踪的卫星的度量组合在一起。 然后,本发明对组合的卫星度量做出帧同步决定。 在实施例中,基于每个卫星的CNO使用最佳组合算法。 根据另外的方面,本发明通过预测子帧中的多个比特来进一步加速帧同步过程,以便除了8比特前同步码之外还有更多比特是已知的。 例如,本发明认识到,子帧中的许多位很少改变或者不经常地改变。 此外,本发明使用用于预测新星历参数的旧星历。 这些参数被转换成信号中的预测位。 此外,旧星历可用于预测年历参数,历书可用于预测星历参数。
    • 6. 发明申请
    • Method and Apparatus for Weak Data Frame Sync in a Positioning System
    • 定位系统中弱数据帧同步的方法和装置
    • US20110193742A1
    • 2011-08-11
    • US13083498
    • 2011-04-08
    • Gary LennenMakarand PhatakWilliam Kerry Keal
    • Gary LennenMakarand PhatakWilliam Kerry Keal
    • G01S19/42G01S19/27H04L7/00
    • G01S19/24G01S19/27
    • The present invention is related to location positioning systems, and more particularly, to a method and apparatus of synchronizing to data frames in a positioning system signal. According to one aspect, the invention speeds up the frame synchronization process by computing a frame synchronization metric for each satellite and then combining together the metrics for all tracked satellites together, after compensating for respective signal transit times. Then the invention makes a frame sync decision on the combined satellite metric. In embodiments, an optimal combining algorithm is used based on CNO of each satellite. According to further aspects, the invention further speeds up the frame synchronization process by predicting many bits in the subframe so that more bits are known in addition to the 8-bit preamble. For example, the invention recognizes that many bits in a subframe rarely change or don't change very often. Moreover, the invention uses old ephemeris used to predict new ephemeris parameters. These parameters are translated into predicted bits in the signal. Still further, old ephemeris can be used to predict almanac parameters, and the almanac can be used to predict ephemeris parameters.
    • 本发明涉及位置定位系统,更具体地说,涉及一种与定位系统信号中的数据帧同步的方法和装置。 根据一个方面,本发明通过计算每个卫星的帧同步度量来加速帧同步过程,然后在补偿相应的信号传送时间之后将所有跟踪的卫星的度量组合在一起。 然后,本发明对组合的卫星度量做出帧同步决定。 在实施例中,基于每个卫星的CNO使用最佳组合算法。 根据另外的方面,本发明通过预测子帧中的多个比特来进一步加速帧同步过程,以便除了8比特前同步码之外还有更多比特是已知的。 例如,本发明认识到,子帧中的许多位很少改变或者不经常地改变。 此外,本发明使用用于预测新星历参数的旧星历。 这些参数被转换成信号中的预测位。 此外,旧星历可用于预测年历参数,历书可用于预测星历参数。
    • 7. 发明授权
    • Method and apparatus for weak data frame sync in a positioning system
    • 定位系统中弱数据帧同步的方法和装置
    • US07924220B1
    • 2011-04-12
    • US12277044
    • 2008-11-24
    • Gary LennenMakarand PhatakWilliam Kerry Keal
    • Gary LennenMakarand PhatakWilliam Kerry Keal
    • G01S19/48H04B1/00
    • G01S19/24G01S19/27
    • The present invention is related to location positioning systems, and more particularly, to a method and apparatus of synchronizing to data frames in a positioning system signal. According to one aspect, the invention speeds up the frame synchronization process by computing a frame synchronization metric for each satellite and then combining together the metrics for all tracked satellites together, after compensating for respective signal transit times. Then the invention makes a frame sync decision on the combined satellite metric. In embodiments, an optimal combining algorithm is used based on CNO of each satellite. According to further aspects, the invention further speeds up the frame synchronization process by predicting many bits in the subframe so that more bits are known in addition to the 8-bit preamble. For example, the invention recognizes that many bits in a subframe rarely change or don't change very often. Moreover, the invention uses old ephemeris used to predict new ephemeris parameters. These parameters are translated into predicted bits in the signal. Still further, old ephemeris can be used to predict almanac parameters, and the almanac can be used to predict ephemeris parameters.
    • 本发明涉及位置定位系统,更具体地说,涉及一种与定位系统信号中的数据帧同步的方法和装置。 根据一个方面,本发明通过计算每个卫星的帧同步度量来加速帧同步过程,然后在补偿相应的信号传送时间之后将所有跟踪的卫星的度量组合在一起。 然后,本发明对组合的卫星度量做出帧同步决定。 在实施例中,基于每个卫星的CNO使用最佳组合算法。 根据另外的方面,本发明通过预测子帧中的多个比特来进一步加速帧同步过程,以便除了8比特前同步码之外还有更多比特是已知的。 例如,本发明认识到,子帧中的许多位很少改变或者不经常地改变。 此外,本发明使用用于预测新星历参数的旧星历。 这些参数被转换成信号中的预测位。 此外,旧星历可用于预测年历参数,历书可用于预测星历参数。
    • 9. 发明申请
    • SIGNAL PROCESSING PROVIDING LOWER DOWNSAMPLING LOSSES
    • 信号处理提供较低的阻塞损失
    • US20080204288A1
    • 2008-08-28
    • US12098933
    • 2008-04-07
    • Erik AndersonPaul Eric BeckmannWilliam Kerry Keal
    • Erik AndersonPaul Eric BeckmannWilliam Kerry Keal
    • H03M7/00
    • G01S19/24G01S19/37
    • Methods and devices for processing GPS signals are provided. The device includes: means for storing one or more lookup tables, each lookup table comprising a plurality of entries, each entry comprising an input segment and an output segment, wherein the output segment is a system response to the corresponding input segment; and processing means for receiving an input data sequence comprising one or more input segments, and for each of the input segments, retrieve from one of the lookup tables the output segments corresponding to the input segment, wherein the processing means is further configured to perform a time-shifted sum of one or more output segments to produce an output sequence that is a downsampled representation of the input data sequence.
    • 提供了处理GPS信号的方法和装置。 该设备包括:用于存储一个或多个查找表的装置,每个查找表包括多个条目,每个条目包括输入段和输出段,其中输出段是对相应输入段的系统响应; 以及处理装置,用于接收包括一个或多个输入段的输入数据序列,并且对于每个输入段,从查找表中的一个检索与输入段相对应的输出段,其中处理装置还被配置为执行 一个或多个输出段的时移和,以产生作为输入数据序列的下采样表示的输出序列。