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    Multiple pass location processor
    1.
    发明授权
    Multiple pass location processor 有权
    多通位置处理器

    公开(公告)号：US07023383B2

    公开(公告)日：2006-04-04

    申请号：US10915786

    申请日：2004-08-11

    申请人： Louis A. Stilp ,  Robert J. Anderson ,  Matthew L. Ward

    发明人： Louis A. Stilp ,  Robert J. Anderson ,  Matthew L. Ward

    IPC分类号： G01S3/02

    CPC分类号： H04W64/00 ,  G01S1/026 ,  G01S5/02 ,  G01S5/021 ,  G01S5/06 ,  H04W4/90 ,  H04W76/50

    摘要： A multiple pass location processing method, for use in a wireless location system (WLS), comprises identifying a received transmission as requiring multiple pass location processing whereby the WLS produces a first, lower quality location estimate and then subsequently produces a second, higher quality location estimate. The WLS then produces the first location estimate and provides it to a first location application, and then produces the second location estimate. The second location estimate may be a more accurate estimate than the first location estimate and/or of a higher confidence than the first location estimate. This method is suitable, but not limited, for use in connection with locating a wireless transmitter involved in an emergency services call and routing the call to a call center.

    摘要翻译： 用于无线定位系统（WLS）的多路径位置处理方法包括将所接收的传输识别为需要多遍位置处理，由此WLS产生第一较低质量的位置估计，然后随后产生第二较高质量位置 估计。 然后，WLS产生第一位置估计并将其提供给第一位置应用，然后产生第二位置估计。 第二位置估计可以是比第一位置估计更准确的估计和/或比第一位置估计高的置信度。 该方法适用于但不限于用于定位涉及紧急服务呼叫的无线发射机并将呼叫路由到呼叫中心。

    Applications processor including a database system, for use in a wireless location system
    2.
    发明授权
    Applications processor including a database system, for use in a wireless location system 有权
    应用处理器包括用于无线定位系统的数据库系统

    公开(公告)号：US07271765B2

    公开(公告)日：2007-09-18

    申请号：US11122735

    申请日：2005-05-05

    申请人： Louis A. Stilp ,  Robert J. Anderson ,  Matthew L. Ward

    发明人： Louis A. Stilp ,  Robert J. Anderson ,  Matthew L. Ward

    IPC分类号： G01S3/02

    CPC分类号： H04W64/00 ,  G01S1/026 ,  G01S5/02 ,  G01S5/021 ,  G01S5/0215 ,  G01S5/0221 ,  G01S5/0252 ,  G01S5/0268 ,  G01S5/0284 ,  G01S5/06 ,  G01S2205/006 ,  G01S2205/008 ,  H04W4/90 ,  H04W76/50 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/144 ,  Y02D70/164

    摘要： An Applications Processor (14) including a centralized database system is used in a wireless location system (WLS). The APs 14 may be used to manage resources in the WLS, including signal collection systems (SCSs 10) and TDOA location processors (TLPs 12). Each AP 14 contains a database containing triggers for the WLS. The WLS can be programmed to locate only certain pre-determined types of transmissions. When a transmission of a pre-determined type occurs, then the WLS is triggered to begin location processing. Each AP 14 also contains applications interfaces that permit a variety of applications to securely access the WLS. These applications may access location records in real time or non-real time, create or delete certain types of triggers, or cause the WLS to take other actions. Each AP 14 is also capable of certain post-processing functions.

    摘要翻译： 在无线定位系统（WLS）中使用包括集中式数据库系统的应用处理器（14）。 AP 14可以用于管理WLS中的资源，包括信号收集系统（SCS 10）和TDOA位置处理器（TLP 12）。 每个AP 14包含一个包含WLS触发器的数据库。 可以将WLS编程为仅定位某些预定类型的传输。 当发生预定类型的发送时，触发WLS开始定位处理。 每个AP 14还包含允许各种应用程序安全访问WLS的应用程序接口。 这些应用程序可以实时或非实时访问位置记录，创建或删除某些类型的触发器，或使WLS采取其他操作。 每个AP 14还能够具有某些后处理功能。

    Modified transmission method for improving accuracy for E-911 calls
    6.
    发明授权
    Modified transmission method for improving accuracy for E-911 calls 有权
    改进了E-911呼叫精度的传输方式

    公开(公告)号：US06519465B2

    公开(公告)日：2003-02-11

    申请号：US09907028

    申请日：2001-07-16

    申请人： Louis A. Stilp ,  Robert J. Anderson ,  Joseph W. Sheehan

    发明人： Louis A. Stilp ,  Robert J. Anderson ,  Joseph W. Sheehan

    IPC分类号： H04B700

    CPC分类号： H04W64/00 ,  G01S1/026 ,  G01S5/02 ,  G01S5/021 ,  G01S5/06 ,  G01S2205/006 ,  G01S2205/008 ,  H04W4/90 ,  H04W76/50

    摘要： The accuracy of the location estimate of a Wireless Location System is dependent, in part, upon both the transmitted power of the wireless transmitter and the length in time of the transmission from the wireless transmitter. In general, higher power transmissions and transmissions of greater transmission length can be located with better accuracy by the Wireless Location System than lower power and shorter transmissions. Wireless communications systems generally limit the transmit power and transmission length of wireless transmitters in order to minimize interference within the communications system and to maximize the potential capacity of the system. The inventive method disclosed herein meets the conflicting needs of both systems by enabling the wireless communications system to minimize transmit power and length while enabling improved location accuracy for certain types of calls, such as wireless 9-1-1 calls. The method comprises the following steps: a wireless transmitter receives normal transmission parameters from a base station; the user of the wireless transmitter initiates a call on the wireless transmitter by dialing a sequence of digits and pressing “SEND” or “YES”; a processor within the wireless transmitter compares the dialed sequence of digits with one or more trigger events stored within the wireless transmitter; if the dialed sequence of digits does not match the trigger event, then the wireless transmitter uses the normal transmission parameters in making the call; and if the dialed sequence of digits matches the trigger event, then the wireless transmitter uses a modified transmission sequence.

    摘要翻译： 无线定位系统的位置估计的精度部分地取决于无线发射机的发射功率和从无线发射机发射的时间长度。 通常，通过无线定位系统可以以比较低的功率和较短的传输更高的精度来定位更高功率的传输和更大传输长度的传输。 无线通信系统通常限制无线发射机的发射功率和传输长度，以便最小化通信系统内的干扰并最大化系统的潜在容量。 本文公开的创造性方法通过使无线通信系统能够最小化发射功率和长度同时实现诸如无线9-1-1呼叫的某些类型的呼叫的改进的位置精度来满足两个系统的冲突的需求。 该方法包括以下步骤：无线发射机从基站接收正常的传输参数; 无线发射机的用户通过拨打一系列数字并按“发送”或“是”来在无线发射机上发起呼叫。 无线发射机内的处理器将拨号的数字序列与存储在无线发射机内的一个或多个触发事件进行比较; 如果拨打的数字序列与触发事件不匹配，则无线发射机在进行呼叫时使用正常的传输参数; 并且如果拨号的数字序列匹配触发事件，则无线发射机使用修改的传输序列。

    Method for estimating TDOA and FDOA in a wireless location system
    7.
    发明授权
    Method for estimating TDOA and FDOA in a wireless location system 有权
    在无线定位系统中估计TDOA和FDOA的方法

    公开(公告)号：US06876859B2

    公开(公告)日：2005-04-05

    申请号：US09908998

    申请日：2001-07-18

    申请人： Robert J. Anderson ,  Alan E. E. Rogers ,  Louis A. Stilp

    发明人： Robert J. Anderson ,  Alan E. E. Rogers ,  Louis A. Stilp

    IPC分类号： G01S5/06 ,  G01S1/02 ,  G01S5/10 ,  G01S19/09 ,  G01S19/46 ,  H04W64/00 ,  H04Q7/20

    CPC分类号： H04W64/00 ,  G01S1/026 ,  G01S5/10

    摘要： A method, used in locating a mobile transmitter, includes providing a set of cross-correlation values, wherein each cross-correlation value is associated with a corresponding TDOA and/or FDOA estimate and is produced by cross-correlating a reference signal with a cooperating signal. The reference signal comprises a copy of a signal transmitted by the mobile transmitter as received at a first antenna and the cooperating signal comprises a copy of the same signal as received at a second antenna. The method further includes determining a most likely range of TDOA and/or FDOA estimates, and then identifying an optimal cross-correlation value within a subset of cross-correlation values corresponding to the most likely range of TDOA and/or FDOA estimates. The TDOA and/or FDOA value corresponding to the optimal cross-correlation value is then employed in calculating the location of the mobile transmitter.

    摘要翻译： 用于定位移动发射机的方法包括提供一组互相关值，其中每个互相关值与相应的TDOA和/或FDOA估计相关联，并且是通过将参考信号与协作的 信号。 参考信号包括由第一天线接收的由移动发射机发送的信号的副本，并且协作信号包括在第二天线处接收到的相同信号的副本。 该方法还包括确定TDOA和/或FDOA估计的最可能范围，然后确定对应于TDOA和/或FDOA估计的最可能范围的互相关值的子集内的最佳互相关值。 然后在计算移动发射机的位置时采用对应于最佳互相关值的TDOA和/或FDOA值。

    Signal collection system for a wireless location system
    10.
    发明授权
    Signal collection system for a wireless location system 有权
    用于无线定位系统的信号采集系统

    公开(公告)号：US06388618B1

    公开(公告)日：2002-05-14

    申请号：US09539370

    申请日：2000-03-31

    申请人： Louis A. Stilp ,  Joseph W. Sheehan ,  Jeffrey F. Bull ,  Robert J. Anderson

    发明人： Louis A. Stilp ,  Joseph W. Sheehan ,  Jeffrey F. Bull ,  Robert J. Anderson

    IPC分类号： G01S302

    CPC分类号： H04W64/00 ,  G01S1/026 ,  G01S5/02 ,  G01S5/021 ,  G01S5/06 ,  G01S2205/008 ,  H04W4/90 ,  H04W76/50 ,  Y02D70/164

    摘要： A signal collection system (SCS) is used in a wireless location system that determines the geographical locations of mobile wireless transmitters. The SCS includes a first receiver module, a first digital signal processing (DSP) module, a control and communications module, a timing signal generator including an enhanced GPS receiver, and a bus coupling the DSP module to the communications and control module. The receiver module receives RF signals from the mobile transmitters via a plurality of antennas and digitizes said RF signals, and provides digitized RF data to the first DSP module.

    摘要翻译： 在确定移动无线发射机的地理位置的无线定位系统中使用信号采集系统（SCS）。 SCS包括第一接收器模块，第一数字信号处理（DSP）模块，控制和通信模块，包括增强型GPS接收器的定时信号发生器和将DSP模块耦合到通信和控制模块的总线。 接收机模块经由多个天线从移动发射机接收RF信号，并对所述RF信号进行数字化，并向第一DSP模块提供数字化的RF数据。