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1. 发明授权

US06661379B2 Antenna selection method for a wireless location system 有权
公开(公告)号：US06661379B2
公开(公告)日：2003-12-09
申请号：US10158522
申请日：2002-05-29
申请人： Louis A. Stilp , Joseph W. Sheehan , Alan E. E. Rogers , Robert J. Anderson , Andrew F. Harbison
发明人： Louis A. Stilp , Joseph W. Sheehan , Alan E. E. Rogers , Robert J. Anderson , Andrew F. Harbison
IPC分类号： G01S302
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 antenna selection method is used in a wireless location system that determines the geographic location of a mobile wireless transmitter. The wireless location system includes signal collection systems connected to multiple antennas at a plurality of cell sites and a location processor for processing digital data provided by the signal collection systems. The antenna selection method comprises evaluating segments of data collected from a plurality of antennas at a signal collection system, selecting a subset of the segments of data, and using only the selected segments of data in location processing.

2. 发明授权

US06483460B2 Baseline selection method for use in a wireless location system 有权
标题翻译：用于无线定位系统的基线选择方法
公开(公告)号：US06483460B2
公开(公告)日：2002-11-19
申请号：US10004895
申请日：2001-12-05
申请人： Louis A. Stilp , Joseph W. Sheehan , Alan E. E. Rogers , Robert J. Anderson , Andrew F. Harbison
发明人： Louis A. Stilp , Joseph W. Sheehan , Alan E. E. Rogers , Robert J. Anderson , Andrew F. Harbison
IPC分类号： G01S302
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： A Wireless Location System includes signal collection systems and location processors for processing digital data provided by the signal collection systems. To determine the geographic location of a mobile wireless transmitter, time difference of arrival, or TDOA, data is determined with respect to a plurality of first signal collection system/antenna second signal collection system/antenna baselines. A method for selecting baselines for use in location processing comprises calculating a number of parameters for each of the plurality of baselines, and including in a final location solution only those baselines meeting or exceeding predefined threshold criteria for each of the parameters.
摘要翻译：无线定位系统包括用于处理由信号采集系统提供的数字数据的信号收集系统和位置处理器。为了确定移动无线发射机的地理位置，到达时间差或TDOA，数据相对于多个第一信号收集系统/天线第二信号收集系统/天线基线确定。用于选择用于位置处理的基线的方法包括计算多个基线中的每一个的参数的数量，并且在最终位置中仅包括满足或超过每个参数的预定阈值标准的那些基准。

3. 发明授权

US06400320B1 Antenna selection method for a wireless location system 有权
标题翻译：一种无线定位系统的天线选择方法
公开(公告)号：US06400320B1
公开(公告)日：2002-06-04
申请号：US09648404
申请日：2000-08-24
申请人： Louis A. Stilp , Joseph W. Sheehan , Alan E. E. Rogers , Robert J. Anderson , Andrew F. Harbison
发明人： Louis A. Stilp , Joseph W. Sheehan , Alan E. E. Rogers , Robert J. Anderson , Andrew F. Harbison
IPC分类号： G01S302
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 antenna selection method is used in a wireless location system that determines the geographic location of a mobile wireless transmitter. The wireless location system includes signal collection systems connected to multiple antennas at a plurality of cell sites and a location processor for processing digital data provided by the signal collection systems. The antenna selection method comprises evaluating segments of data collected from a plurality of antennas at a signal collection system, selecting a subset of the segments of data, and using only the selected segments of data in location processing.
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天线选择方法。无线定位系统包括连接到多个小区站点处的多个天线的信号采集系统和用于处理由信号采集系统提供的数字数据的位置处理器。天线选择方法包括评估在信号采集系统从多个天线收集的数据的段，选择数据段的子集，并且仅在位置处理中仅使用所选择的数据段。

4. 发明授权

US06563460B2 Collision recovery in a wireless location system 有权
公开(公告)号：US06563460B2
公开(公告)日：2003-05-13
申请号：US10005068
申请日：2001-12-05
申请人： Louis A. Stilp , Joseph W. Sheehan , Alan E. E. Rogers , Robert J. Anderson
发明人： Louis A. Stilp , Joseph W. Sheehan , Alan E. E. Rogers , Robert J. Anderson
IPC分类号： G01S302
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： A collision recovery method for use in a Wireless Location System includes receiving a transmission from a wireless transmitter at multiple signal collection systems and multiple antenna ports of each of the multiple signal collection systems. At each of the multiple signal collection systems, the transmission received at each antenna port is converted into a digital format, and digital data representative of the received transmission is stored. The transmission is then demodulated, and TDOA analysis is performed on the digital data from pairs of signal collection systems. The location of the wireless transmitter is determined using the TDOA data. The method further involves verifying that the RF data from each antenna port is from the wireless transmitter to be located, e.g., by demodulating a segment of the transmission received at each antenna port and verifying that at least a combination of the following fields is correct: MIN, MSID, TMSI, IMSI, and ESN.

5. 发明授权

US06463290B1 Mobile-assisted network based techniques for improving accuracy of wireless location system 有权
标题翻译：基于移动辅助网络技术，提高无线定位系统的准确性
公开(公告)号：US06463290B1
公开(公告)日：2002-10-08
申请号：US09679228
申请日：2000-10-03
申请人： Louis A. Stilp , Joseph W. Sheehan , Alan E. E. Rogers , Robert J. Anderson , Vineet Sachdev
发明人： Louis A. Stilp , Joseph W. Sheehan , Alan E. E. Rogers , Robert J. Anderson , Vineet Sachdev
IPC分类号： H04Q700
CPC分类号： H04W64/00 , G01S1/026 , G01S5/02 , G01S5/021 , G01S5/0273 , 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. Several methods meet 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 (emergency) calls. Such methods include mobile-assisted techniques in which the mobile unit includes functionality to assist in improving location accuracy. The WLS locates the transmitter (mobile unit) while the latter is using a modified transmission sequence comprising a message sent from the wireless transmitter using transmission parameters different from the normal transmission parameters broadcast on the forward control channel by the base stations in the associated wireless communications system. A trigger event, such as the user dialing 9-1-1, causes the mobile unit to operate in the mode in which the modified transmission sequence is used.
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。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（紧急）呼叫的某些类型的呼叫的改进的定位精度，几种方法满足两个系统的冲突的需求。这些方法包括移动辅助技术，其中移动单元包括有助于提高定位精度的功能。 WLS定位发射机（移动单元），而后者使用修改的传输序列，该修改的传输序列包括使用与相关无线通信中的基站在前向控制信道上广播的正常传输参数不同的传输参数从无线发射机发送的消息系统。诸如用户拨号9-1-1之类的触发事件使得移动单元在使用修改的传输序列的模式下操作。

6. 发明授权

US06285321B1 Station based processing method for a wireless location system 有权
公开(公告)号：US06285321B1
公开(公告)日：2001-09-04
申请号：US09645802
申请日：2000-08-24
申请人： Louis A. Stilp , Joseph W. Sheehan , Alan E. E. Rogers , Robert J. Anderson
发明人： Louis A. Stilp , Joseph W. Sheehan , Alan E. E. Rogers , Robert J. Anderson
IPC分类号： G01S302
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： A station-based method for use in a wireless location system determines the geographic location of a mobile wireless transmitter. The wireless location system includes signal collection systems and location processors for processing digital data provided by the signal collection systems. The station-based method comprises receiving a transmission from a wireless transmitter at multiple antennas and at multiple signal collection systems. The transmission is converted into a digital format in a receiver connected to each antenna at the multiple signal collection systems. At each signal collection system, digital data representative of the received transmissions are stored in a memory. The transmission is then demodulated at a first signal collection system, and appropriate phase correction intervals are determined. At the first signal collection system, for each such phase correction interval, appropriate phase correction parameters are calculated, and the phase correction parameters are encoded along with the demodulated data. The demodulated data and phase correction parameters are sent from the first signal collection system to a location processor. At the location processor, the signal collection systems and receiving antennas to use in location processing are determined. The demodulated data and any needed phase correction parameters are then sent from the location processor to a plurality of signal collection systems that will be used in location processing. At each signal collection system to be used in location processing, a first re-modulated signal based upon the demodulated data and any needed phase correction parameters is created; and a time difference of arrival (TDOA) determination is performed using the digital data stored in memory and the first re-modulated signal. The TDOA and multipath mitigation data are sent from the signal collection systems to the location processor. Finally, the location of the wireless transmitter is determined at the location processor using the TDOA data.

7. 发明授权

US06876859B2 Method for estimating TDOA and FDOA in a wireless location system 有权
标题翻译：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。

8. 发明授权

US06317604B1 Centralized database system for a wireless location system 有权
标题翻译：无线定位系统的集中数据库系统
公开(公告)号：US06317604B1
公开(公告)日：2001-11-13
申请号：US09539352
申请日：2000-03-31
申请人： Michael John Kovach, Jr. , Anthony Richard Brigidi , John Solley , Edwin E. McCook , Robert J. Anderson , Vineet Sachdev , Thomas Ginter , Joseph W. Sheehan , Louis A. Stilp
发明人： Michael John Kovach, Jr. , Anthony Richard Brigidi , John Solley , Edwin E. McCook , Robert J. Anderson , Vineet Sachdev , Thomas Ginter , Joseph W. Sheehan , Louis A. Stilp
IPC分类号： H04Q720
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： A centralized database system is used in a wireless location system that determines the geographical locations of mobile wireless transmitters, the wireless location system including signal collection systems, location processors for processing digitized RF data provided by the signal collection systems, and a centralized database system for managing resources in the wireless location system. The centralized database system includes a computer, a database, and a plurality of software processes for managing the wireless location system, providing interfaces to external users and applications, and storing location records and configuration information.
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集中式数据库系统，包括信号收集系统的无线定位系统，用于处理由信号采集系统提供的数字化RF数据的位置处理器，以及用于管理无线定位系统中的资源。集中式数据库系统包括计算机，数据库和用于管理无线位置系统的多个软件过程，向外部用户和应用提供接口以及存储位置记录和配置信息。

9. 发明授权

US06388618B1 Signal collection system for a wireless location system 有权
标题翻译：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。

10. 发明授权

US06334059B1 Modified transmission method for improving accuracy for e-911 calls 有权
标题翻译：用于提高e-911呼叫精度的改进传输方法
公开(公告)号：US06334059B1
公开(公告)日：2001-12-25
申请号：US09541888
申请日：2000-03-31
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： H04Q700
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。

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