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    UTILIZING SBAS SIGNALS TO IMPROVE GNSS RECEIVER PERFORMANCE
    45.
    发明申请
    UTILIZING SBAS SIGNALS TO IMPROVE GNSS RECEIVER PERFORMANCE 失效
    利用SBAS信号改善GNSS接收机的性能

    公开(公告)号：US20100232351A1

    公开(公告)日：2010-09-16

    申请号：US12402426

    申请日：2009-03-11

    申请人： Mangesh CHANSARKAR ,  Gang Xie ,  Gengsheng Zhang

    发明人： Mangesh CHANSARKAR ,  Gang Xie ,  Gengsheng Zhang

    IPC分类号： H04B7/216 ,  G01S19/03

    CPC分类号： G01S19/13 ,  G01S19/25

    摘要： The present invention provides methods of improving GNSS receivers' satellite signal acquisition and TIFF performances by taking advantage of SBAS signals. Due to a SBAS satellite's geostationary position and typically strong signal, the SBAS satellite signal can be acquired more quickly than a GPS satellite signal. Once a SBAS satellite signal is acquired the Doppler frequency search uncertainty may be reduced for remaining GNSS satellites which are to be acquired. Furthermore, a satellite search list may be optimized to search for satellites close to the line of sight (LOS) of the SBAS satellite for which a signal has been acquired, in receiver “warm” and “hot” start modes. Moreover, since a SBAS signal sub-frame is only one second long, which is shorter than six seconds for a GPS signal sub-frame, synchronization of the SBAS signal sub-frame may be achieved faster than for GPS signals. With aided time information, a receiver may compute the absolute time of week (TOW) from a sub-frame synchronized SBAS signal. Therefore, without necessarily waiting for TOW to be decoded from a GPS signal and with TOW extracted from a SBAS signal, a receiver can achieve better TTFF performance.

    摘要翻译： 本发明提供了通过利用SBAS信号来改进GNSS接收机的卫星信号采集和TIFF性能的方法。 由于SBAS卫星的对地静止位置和典型的强信号，可以比GPS卫星信号更快地获取SBAS卫星信号。 一旦获取了SBAS卫星信号，可能会减少将要获取的剩余GNSS卫星的多普勒频率搜索不确定度。 此外，可以优化卫星搜索列表，以在接收机“暖”和“热”启动模式中搜索靠近已经获取信号的SBAS卫星的视线（LOS）的卫星。 此外，由于对于GPS信号子帧，SBAS信号子帧仅为1秒长度，其短于6秒，所以可以比针对GPS信号更快地实现SBAS信号子帧的同步。 利用辅助时间信息，接收机可以从子帧同步的SBAS信号计算绝对时间（TOW）。 因此，不必等待TOW从GPS信号解码，并且从SBAS信号提取TOW，接收机可以实现更好的TTFF性能。

    Satellite Clock Prediction
    46.
    发明申请
    Satellite Clock Prediction 有权
    卫星时钟预测

    公开(公告)号：US20080238765A1

    公开(公告)日：2008-10-02

    申请号：US11694430

    申请日：2007-03-30

    申请人： Gengsheng Zhang ,  Makarand S. Phatak ,  Lionel J. Garin ,  Marlene Wan

    发明人： Gengsheng Zhang ,  Makarand S. Phatak ,  Lionel J. Garin ,  Marlene Wan

    IPC分类号： G01S1/00 ,  H04B7/185

    CPC分类号： G01S19/05 ,  G01S19/23 ,  G01S19/258 ,  G01S19/27

    摘要： Devices and methods are described for determining position information without broadcast ephemeris data for a spanned time period using predictions of future satellite states. These predictions include predictions of satellite clock bias. During the spanned time period, broadcast ephemeris is received such that a broadcast-ephemeris-derived satellite clock bias may be determined. The predictions of satellite clock bias subsequent to the receipt of the broadcast ephemeris may then be corrected based upon the broadcast-ephemeris-derived satellite clock bias.

    摘要翻译： 描述了用于使用对未来卫星状态的预测来确定跨越时间段的广播星历数据的位置信息的装置和方法。 这些预测包括对卫星时钟偏差的预测。 在跨越的时间段期间，接收广播星历，使得可以确定广播 - 星历衍生的卫星时钟偏差。 然后可以基于广播 - 星历衍生的卫星时钟偏差来校正在接收广播星历之后的卫星时钟偏差的预测。

    Mobile access point detection
    47.
    发明授权
    Mobile access point detection 有权
    移动接入点检测

    公开(公告)号：US09167551B2

    公开(公告)日：2015-10-20

    申请号：US13612582

    申请日：2012-09-12

    申请人： Weihua Gao ,  Ju-Yong Do ,  Gengsheng Zhang ,  Ferit Ozan Akgul ,  Ashok Bhatia

    发明人： Weihua Gao ,  Ju-Yong Do ,  Gengsheng Zhang ,  Ferit Ozan Akgul ,  Ashok Bhatia

    IPC分类号： H04W24/00 ,  H04W64/00 ,  H04W4/02 ,  H04W28/08 ,  H04W88/06 ,  H04W48/20 ,  H04W84/00 ,  H04W48/16

    CPC分类号： H04W64/003 ,  H04W4/02 ,  H04W24/00 ,  H04W28/08 ,  H04W48/16 ,  H04W48/20 ,  H04W84/005 ,  H04W88/06

    摘要： Methods and devices for detecting mobile access points are disclosed. In one embodiment, a method of detecting mobile access points comprises collecting crowdsourcing data associated with one or more access point devices, quantizing the crowdsourcing data to generate a quantized crowdsourcing data, for each access point device, determining an interfracile range of the access point device using the quantized crowdsourcing data, where the interfracile range is a measure of statistical dispersion of the quantized crowdsourcing data with respect to the access point device, identifying the access point device as a mobile access point device in response to the interfracile range exceeds a first predetermined range. The method of collecting crowdsourcing data comprises collecting the crowdsourcing data within a predetermined sliding time window.

    摘要翻译： 公开了用于检测移动接入点的方法和设备。 在一个实施例中，检测移动接入点的方法包括：收集与一个或多个接入点设备相关联的众包数据，对每个接入点设备量化众包数据以生成量化的众包数据，确定接入点设备的间接范围 使用量化的众包数据，其中interfracile范围是量化的众包数据相对于接入点设备的统计色散的度量，将接入点设备识别为响应于interfracile范围的移动接入点设备超过第一预定 范围。 收集众包数据的方法包括在预定的滑动时间窗口内收集众包数据。

    Determining clock models
    48.
    发明授权
    Determining clock models 有权
    确定时钟模型

    公开(公告)号：US09167542B2

    公开(公告)日：2015-10-20

    申请号：US13418068

    申请日：2012-03-12

    申请人： Ju-Yong Do ,  Gengsheng Zhang ,  Dominic Gerard Farmer

    发明人： Ju-Yong Do ,  Gengsheng Zhang ,  Dominic Gerard Farmer

    IPC分类号： H04W56/00 ,  G01S5/02

    CPC分类号： H04W56/001 ,  G01S5/021 ,  G01S5/0226 ,  G01S5/0236 ,  H04W4/02

    摘要： Examples disclosed herein relate to methods and apparatuses for observing signals transmitted by one or more transmitters in an asynchronous communication network and applying a time reference to generate a clock model. In one embodiment, parameters representing the clock model may then be forwarded to other mobile devices to assist in positioning operations.

    摘要翻译： 本文公开的示例涉及用于观察由异步通信网络中的一个或多个发射机发送的信号并应用时间参考以生成时钟模型的方法和装置。 在一个实施例中，然后可以将表示时钟模型的参数转发到其他移动设备以帮助定位操作。

    Interface for a GPS system
    50.
    发明授权
    Interface for a GPS system 有权
    GPS系统接口

    公开(公告)号：US08762054B2

    公开(公告)日：2014-06-24

    申请号：US13616583

    申请日：2012-09-14

    申请人： Steve Chang Chiayee ,  Ashutosh Pande ,  Lionel Jacques Garin ,  Gengsheng Zhang

    发明人： Steve Chang Chiayee ,  Ashutosh Pande ,  Lionel Jacques Garin ,  Gengsheng Zhang

    IPC分类号： G01C21/00

    CPC分类号： G01S19/05 ,  G01S5/0236 ,  G01S19/258 ,  G01S19/37

    摘要： A protocol independent interface for processing, within a mobile device, protocol aiding data received at a call processor with a Global Positioning System (“GPS”) interface, where the protocol aiding data is produced according to a Geolocation Server Station protocol is disclosed. The protocol independent interface may include a means for receiving, at the GPS interface, the protocol aiding data received at the call processor, means for converting the received protocol aiding data to interface data that is transparent to the Geolocation Server Station protocol, and means for passing the interface data to a GPS module.

    摘要翻译： 一种协议无关接口，用于在移动设备内处理协议，协助在呼叫处理器处接收的数据与全球定位系统（“GPS”）接口，其中根据地理位置服务器站协议产生协议辅助数据。 独立于协议的接口可以包括用于在GPS接口处接收协助在呼叫处理器处接收的数据的装置，用于将接收到的协议辅助数据转换为对于地理位置服务器站协议是透明的接口数据的装置， 将接口数据传送到GPS模块。