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31. 发明授权

US07324045B2 System and method for fast initialization of navigational satellite signal receivers 有权
标题翻译：导航卫星信号接收机快速初始化的系统和方法
公开(公告)号：US07324045B2
公开(公告)日：2008-01-29
申请号：US11124413
申请日：2005-05-06
申请人： Jun Mo , Hansheng Wang , Chi-Shin Wang , Shaowei Han , Kudrethaya A. Shridhara
发明人： Jun Mo , Hansheng Wang , Chi-Shin Wang , Shaowei Han , Kudrethaya A. Shridhara
IPC分类号： G01S1/00 , H04B7/185 , H04B1/00
CPC分类号： G01S19/28
摘要： The present invention provides a method and apparatus for a satellite navigation receiver to lock onto satellite signals in the cold start mode with no information on the receiver position, the satellite position, or time estimates stored in the receiver's memory. All satellites in a positioning system are divided into groups based on the satellite constellation structure. In an embodiment, the positioning system is the Global Positioning System (GPS) and all GPS satellites are divided into three groups. During initialization of the receiver, the satellites are searched per group to lock onto at least one satellite signal. Other satellites are then searched in a given order based on their respective distance or proximity to the first satellite acquired. This method reduces the Time-to-First-Fix (TTFF) ordinarily required by conventional receivers in the cold start mode.
摘要翻译：本发明提供了一种用于卫星导航接收机在冷启动模式下锁定卫星信号的方法和装置，其中没有关于存储在接收机的存储器中的接收机位置，卫星位置或时间估计的信息。基于卫星星座结构将定位系统中的所有卫星分成几组。在一个实施例中，定位系统是全球定位系统（GPS），所有GPS卫星分为三组。在接收机的初始化期间，每组搜索卫星以锁定至少一个卫星信号。然后根据其相应的距离或与所获取的第一卫星的距离，以给定的顺序搜索其他卫星。这种方法减少了常规接收机在冷启动模式下通常要求的首次固定时间（TTFF）。

32. 发明授权

US07298319B2 Automatic decorrelation and parameter tuning real-time kinematic method and apparatus 有权
标题翻译：自动去相关和参数调整实时运动学方法和装置
公开(公告)号：US07298319B2
公开(公告)日：2007-11-20
申请号：US10826270
申请日：2004-04-19
申请人： Shaowei Han , Liwen Dai
发明人： Shaowei Han , Liwen Dai
IPC分类号： G01S5/14 , G01C21/20
CPC分类号： G01S19/44
摘要： A method of and computer-readable medium containing instructions for high accuracy, reliable position determination. The ADAPT-RTK Technology (Automatic Decorrelation and Parameter Tuning Real-Time Kinematic technology) is described using an innovative decorrelation algorithm to decorrelate the correlation between L1 and L2 measurements through a functional model and a stochastic model reducing the impact on performance of distance dependent biases.
摘要翻译：包含用于高精度，可靠位置确定的指令的方法和计算机可读介质。使用创新的去相关算法描述ADAPT-RTK技术（自动相关和参数调谐实时运动技术），通过功能模型和随机模型去除关联L1和L2测量之间的相关性，从而降低对距离相关偏差的影响。

33. 发明申请

US20070211793A1 Multipath error estimation in satellite navigation receivers 有权
标题翻译：卫星导航接收机中的多径误差估计
公开(公告)号：US20070211793A1
公开(公告)日：2007-09-13
申请号：US11372739
申请日：2006-03-09
申请人： Shaowei Han
发明人： Shaowei Han
IPC分类号： H04B1/00
CPC分类号： G01S19/37 , G01S19/22 , G01S19/24 , H04B1/709 , H04B1/7117
摘要： The invention presented in this disclosure gives methods to estimate and compensate for the multi-path in a typical navigational or spread spectrum receiver. The multi-path delay is estimated based on the outputs of different correlators of the receiver. Unlike three correlators normally used, the present disclosure uses five correlators, namely, Early2 (E2), Early1 (E1), Prompt (P), Late1 (L1) and Late2 (L2). The possible multi-path scenarios are classified into six different cases depending upon the reflected signal delay and the errors are computed. Further, the algorithm in the present disclosure can be extended to any correlators spacing.
摘要翻译：在本公开中呈现的本发明提供了估计和补偿典型导航或扩频接收机中的多路径的方法。基于接收机的不同相关器的输出来估计多径延迟。不同于通常使用的三个相关器，本公开使用五个相关器，即早期2（E 2），早期1（E 1），提示（P），延迟1（L 1）和后期2（L 2）。根据反射的信号延迟，可能的多路径情景分为六种不同的情况，并计算出误差。此外，本公开中的算法可以扩展到任何相关器间隔。

34. 发明申请

US20070205940A1 METHOD AND DEVICE FOR TRACKING WEAK GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS) SIGNALS 失效
标题翻译：跟踪全球导航卫星系统（GNSS）信号的方法和装置
公开(公告)号：US20070205940A1
公开(公告)日：2007-09-06
申请号：US11618131
申请日：2006-12-29
申请人： Chun Yang , Shaowei Han
发明人： Chun Yang , Shaowei Han
IPC分类号： G01S5/14
CPC分类号： G01S19/24 , G01S19/29 , G01S19/37
摘要： A Global Navigation Satellite System (GNSS) receiver and associated method capable of tracking weak GNSS signals from a plurality of GNSS satellites. In a preferred embodiment, code and carrier tracking loops are initially closed around the code phase, carrier frequency, and data bit edge estimates handed over from an acquisition mode. In subsequent tracking, early, prompt, and late copies of the code replica are correlated with the incoming signal. The prompt correlations are coherently integrated over an extended updating interval for data bit edge and sign estimation as well as for carrier phase and frequency error discrimination whereas the early and late correlations are used for code error discrimination. Code delay and carrier phase and frequency errors are used to update the code and carrier tracking loop filters. Together with data bits, they form observables of a GNSS signal's time and frequency parameters for timing and position fixing.
摘要翻译：一种能够跟踪来自多个GNSS卫星的弱GNSS信号的全球导航卫星系统（GNSS）接收机和相关方法。在优选实施例中，代码和载波跟踪循环首先围绕从采集模式切换的码相位，载波频率和数据比特边缘估计值闭合。在随后的跟踪中，代码副本的早期，及时和晚期副本与输入信号相关。对于数据位边沿和符号估计以及载波相位和频率误差鉴别的延迟更新间隔，快速相关被相干地集成，而早期和晚期相关用于码错误鉴别。代码延迟和载波相位和频率误差用于更新代码和载波跟踪环路滤波器。与数据位一起，它们形成GNSS信号的时间和频率参数的观测值，用于定时和位置固定。

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