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    • 2. 发明申请
    • SYSTEM, METHOD AND COMPUTER PROGRAM FOR ULTRA FAST TIME TO FIRST FIX FOR A GNSS RECEIVER
    • 用于GNSS接收机的第一个固件的超快时间的系统,方法和计算机程序
    • US20120293366A1
    • 2012-11-22
    • US13575512
    • 2011-01-27
    • Zhe LiuFrancis Yuen
    • Zhe LiuFrancis Yuen
    • G01S19/43
    • G01S19/24G01S19/31G01S19/42
    • The present invention provides a system, method and computer program for a GNSS receiver that is operable to provide an ultra fast Time To First Fix (TTFF). The invention is implementable without requiring the decoding of a navigation message transmitted by GNSS satellite systems. The system of the present invention may comprise a parameter obtaining means, a clock obtaining means and a Fast TTFF engine. The parameter obtaining means may obtain satellite parameters of one or more GNSS satellites. The clock obtaining means may obtain a clock for estimating a GNSS time tag. The Fast TTFF engine may be linkable to a signal interface that is operable to provide I/Q samples from a GNSS antenna. The Fast TTFF engine may comprise a measurement generation utility, a coarse search utility and a fine search utility. The measurement generation utility may compute the Doppler frequency shift and the code phase of the one or more GNSS satellites based on the I/Q samples.
    • 本发明提供了一种用于GNSS接收机的系统,方法和计算机程序,其可操作以提供超快速的首次定时(TTFF)。 本发明是可实现的,而不需要对由GNSS卫星系统发送的导航消息进行解码。 本发明的系统可以包括参数获取装置,时钟获取装置和快速TTFF引擎。 参数获取装置可以获得一个或多个GNSS卫星的卫星参数。 时钟获取装置可以获得用于估计GNSS时间标签的时钟。 快速TTFF引擎可以链接到可操作以从GNSS天线提供I / Q采样的信号接口。 快速TTFF引擎可以包括测量生成实用程序,粗略搜索实用程序和精细搜索实用程序。 测量生成实用程序可以基于I / Q采样来计算一个或多个GNSS卫星的多普勒频移和码相位。
    • 3. 发明申请
    • SYSTEM, METHOD AND COMPUTER PROGRAM FOR NAVIGATION DATA BIT SYNCHRONIZATION FOR A GNSS RECEIVER
    • 用于GNSS接收机的导航数据位同步的系统,方法和计算机程序
    • US20120293369A1
    • 2012-11-22
    • US13575570
    • 2011-01-27
    • Zhe LiuFrancis Yuen
    • Zhe LiuFrancis Yuen
    • G01S19/37
    • G01S19/37G01S19/24
    • The present invention relates to navigation data bit synchronization for a GNSS receiver and more specifically to a software-based GNSS receiver that is operable to rapidly achieve accurate navigation data bit synchronization. It provides a system, method and computer program for navigation data bit synchronization for a GNSS receiver. The system comprises a navigation bit synchronization engine operable to detect one or more indicators in one or more data samples received from a GNSS satellite. The location of the navigation bit is derivable from the one or more indicators. The bit synchronization engine may include one or more of (i) a coarse search utility, (ii) a regular search utility, (iii) a fine search utility and (iv) a bit-edge prediction utility.
    • 本发明涉及GNSS接收机的导航数据位同步,更具体地涉及可操作以快速实现精确的导航数据位同步的基于软件的GNSS接收机。 它为GNSS接收机提供导航数据位同步的系统,方法和计算机程序。 该系统包括可操作以检测从GNSS卫星接收的一个或多个数据样本中的一个或多个指示符的导航位同步引擎。 导航位的位置可从一个或多个指示符导出。 比特同步引擎可以包括(i)粗略搜索实用程序,(ii)常规搜索实用程序,(iii)精细搜索实用程序和(iv)位边缘预测实用程序中的一个或多个。