MAINTENANCE OF A CALIBRATION DATA BASE FOR POSITION LOCATION DETERMINATION OF WIRELESS MOBILE STATIONS
    41.
    发明申请
    MAINTENANCE OF A CALIBRATION DATA BASE FOR POSITION LOCATION DETERMINATION OF WIRELESS MOBILE STATIONS 审中-公开
    校准数据库的维护位置无线移动站的位置确定

    公开(公告)号:WO03065740A3

    公开(公告)日:2003-10-16

    申请号:PCT/US0241255

    申请日:2002-12-26

    Applicant: QUALCOMM INC

    Abstract: In a wireless telecommunications network, hybrid (GPS and AFLT) mobile stations provide redundant position information, which is used for time base calibration and/or correction of position measurements. Every mobile station (i.e., handset or cellular phone) can be used as a test instrument, and data from regular wireless phone calls can be supplemented by data from drive-around field test units. The time base and/or position offsets are stored in a calibration data base along with other information used for obtaining the most reliable position fixes under a variety of conditions. An automatic system is provided for creating, updating, and maintaining the calibration data base. The automatic system not only characterizes the performance of the wireless network but also characterizes the performance of the position determination system. The automatic system provides performance feedback to system operators and customers.

    Abstract translation: 在无线电信网络中,混合(GPS和AFLT)移动站提供用于时基校准和/或位置测量校正的冗余位置信息。 每个移动站(即,手机或蜂窝电话)可以用作测试仪器,并且来自常规无线电话呼叫的数据可以由来自驱动环境现场测试单元的数据补充。 将时基和/或位置偏移与用于在各种条件下获得最可靠的位置定位的其他信息一起存储在校准数据库中。 提供了一种用于创建,更新和维护校准数据库的自动系统。 自动系统不仅表征无线网络的性能,而且还表征了位置确定系统的性能。 自动系统为系统运营商和客户提供性能反馈。

    METHOD AND APPARATUS FOR ESTIMATING VELOCITY OF A TERMINAL IN A WIRELESS COMMUNICATION SYSTEM
    42.
    发明申请
    METHOD AND APPARATUS FOR ESTIMATING VELOCITY OF A TERMINAL IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
    用于估计无线通信系统中终端速度的方法和装置

    公开(公告)号:WO02056052A3

    公开(公告)日:2003-05-30

    申请号:PCT/US0149992

    申请日:2001-10-29

    Applicant: QUALCOMM INC

    CPC classification number: G01S19/52 G01S11/10 G01S2013/466

    Abstract: Techniques to estimate the velocity of a terminal in a wireless communication system. Movement by the terminal results in a Doppler shift in the frequency of each transmitted signal received at the terminal. In one method, the positions of the terminal, a base station, and each of two or more satellites are initially determined. A residual rate of a change of pseudo-range may also be determined for each satellite, e.g., based on (1) an estimated baseband frequency error that includes the Doppler frequency shift due to the terminal's movement and (2) an estimated Doppler frequency shift due to movement by the satellite. A set of equations is then formed based on the determined positions of the terminal, the base station, and the satellites and the determined residual rates of change of pseudo-ranges for the satellites. The velocity of the terminal may thereafter be estimated based on the set of equations.

    Abstract translation: 估计无线通信系统中终端速度的技术。 由终端的移动导致在终端处接收的每个发送信号的频率的多普勒频移。 在一种方法中,首先确定终端,基站和两个或更多个卫星中的每一个的位置。 也可以针对每个卫星确定每个卫星的残差率,例如,基于(1)由于终端的移动而包括多普勒频移的估计的基带频率误差和(2)估计的多普勒频移 由于卫星的移动。 然后基于确定的终端,基站和卫星的位置以及所确定的用于卫星的伪距变化的剩余速率来形成一组方程式。 此后可以基于方程组来估计终端的速度。

    GPS SATELLITE SIGNAL ACQUISITION ASSISTANCE SYSTEM AND METHOD IN A WIRELESS COMMUNICATIONS NETWORK
    43.
    发明申请
    GPS SATELLITE SIGNAL ACQUISITION ASSISTANCE SYSTEM AND METHOD IN A WIRELESS COMMUNICATIONS NETWORK 审中-公开
    无线通信网络中的GPS卫星信号采集辅助系统和方法

    公开(公告)号:WO0231526A3

    公开(公告)日:2002-09-06

    申请号:PCT/US0132014

    申请日:2001-10-11

    Applicant: QUALCOMM INC

    CPC classification number: G01S19/05 G01S19/256 H04B2201/70715

    Abstract: A system and method for assisting an integrated GPS/wireless terminal unit in acquiring one or more GPS satellite signals from the GPS satellite constellation. The invention includes a method for narrowing the PN-code phase search. That is, by accounting for the variables in geographic location and time delay relative to GPS time, the systems and methods of the present invention generate a narrow code-phase search range that enables the terminal unit to more quickly acquire and track the necessary GPS satellites, and thereby more quickly provide accurate position information to a requesting entity.

    Abstract translation: 一种用于辅助集成GPS /无线终端单元从GPS卫星星座获取一个或多个GPS卫星信号的系统和方法。 本发明包括一种缩窄PN码相位搜索的方法。 也就是说,通过考虑相对于GPS时间的地理位置和时间延迟的变量,本发明的系统和方法产生窄码相搜索范围,使得终端单元能够更快速地获取并跟踪必要的GPS卫星 ,从而更快速地向请求实体提供准确的位置信息。

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