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    • 3. 发明授权
    • Subscriber selective, area-based service control
    • 用户选择性,基于区域的服务控制
    • US08463297B2
    • 2013-06-11
    • US11965481
    • 2007-12-27
    • Jeffrey F. BullMatthew L. Ward
    • Jeffrey F. BullMatthew L. Ward
    • H04W24/00H04M11/04H04M3/493H04M1/00H04B7/00
    • H04W48/04H04W4/021
    • A method for use in controlling a mobile device's access to one or more wireless communications networks (WCNs) with an overlaid wireless location system (WLS) includes monitoring a set of one or more predefined signaling links of at least one WCN, and detecting an event associated with the mobile device. Next, using a low-accuracy location function of the WLS, the system determines that the mobile device is within a defined area of interest and is potentially within a defined quiet zone. Next, using a high-accuracy location function of the WLS, the system determines a precise geographic location of the mobile device and based thereon confirms that the mobile device is within the quiet zone or at least within an area of ambiguity around the quiet zone. Finally, the mobile device's access to the wireless communications network is limited, e.g., according to a pre-defined rule established by the carrier. This approach allows finer definition of the fenced area while also minimizing the load on the high-accuracy location function. The proximity threshold is preferably based on the accuracy of the underlying location technology.
    • 一种用于控制移动设备对具有覆盖的无线定位系统(WLS)的一个或多个无线通信网络(WCN)的访问的方法包括监视至少一个WCN的一个或多个预定信令链路的集合,并且检测事件 与移动设备相关联。 接下来,使用WLS的低精度定位功能,系统确定移动设备在定义的感兴趣区域内并且潜在地在定义的安静区域内。 接下来,使用WLS的高精度位置功能,系统确定移动设备的精确地理位置,并且基于此确认移动设备在安静区域内或至少在安静区域周围的模糊区域内。 最后,移动设备对无线通信网络的访问受到限制,例如,根据由载体建立的预定义规则。 这种方法可以更精细地定义围栏区域,同时最大限度地降低高精度定位功能的负担。 接近阈值优选地基于底层定位技术的准确性。
    • 7. 发明授权
    • Location of wideband OFDM transmitters with limited receiver bandwidth
    • 具有有限接收机带宽的宽带OFDM发射机的位置
    • US08145238B2
    • 2012-03-27
    • US12909732
    • 2010-10-21
    • Robert J. AndersonRashidus S. Mia
    • Robert J. AndersonRashidus S. Mia
    • H04W24/00H04B7/204H04B7/208
    • H04W64/00G01S5/0036G01S5/0226G01S5/10
    • One illustrative embodiment takes the form of a system for locating wireless transmitters employing an Orthogonal Frequency Division Multiplexing (OFDM) digital modulation scheme. The OFDM scheme comprises transmitting signal components over narrowband frequency channels spanning a wideband channel. The system includes a first receiving system configured to receive a fraction of the signal components transmitted by a first wireless transmitter to be located in a fraction of the narrowband frequency channels, and to process the fraction of the signal components to derive location related measurements. The system further includes at least a second receiving system configured to receive the fraction of the signal components transmitted by the first wireless transmitter, and to process this fraction of the signal components to derive location related measurements. The system also includes a processing system configured to use location related measurements from the first and second receiving systems to compute the location of the wireless transmitter.
    • 一个说明性实施例采用采用正交频分复用(OFDM)数字调制方案来定位无线发射机的系统的形式。 OFDM方案包括在跨越宽带信道的窄带频率信道上发射信号分量。 该系统包括第一接收系统,该第一接收系统被配置为接收由第一无线发射机传输的信号分量的一小部分以位于窄带频率信道的一部分中,并且处理信号分量的分数以导出位置相关测量。 该系统还包括至少第二接收系统,其被配置为接收由第一无线发射机发射的信号分量的一部分,并且处理该部分信号分量以导出位置相关测量。 该系统还包括配置成使用来自第一和第二接收系统的位置相关测量来计算无线发射机的位置的处理系统。
    • 8. 发明授权
    • Method for position estimation using generalized error distributions
    • 使用广义误差分布进行位置估计的方法
    • US08138976B2
    • 2012-03-20
    • US13086916
    • 2011-04-14
    • Pete A. BoyerRashidus S. MiaEdward Joseph Segall
    • Pete A. BoyerRashidus S. MiaEdward Joseph Segall
    • G01S5/02
    • G01S5/10G01S5/0278G01S5/06
    • A method for improving the results of radio location systems that incorporate weighted least squares optimization generalizes the weighted least squares method by using maximum a posteriori (MAP) probability metrics to incorporate characteristics of the specific positioning problem (e.g., UTDOA). Weighted least squares methods are typically used by TDOA and related location systems including TDOA/AOA and TDOA/GPS hybrid systems. The incorporated characteristics include empirical information about TDOA errors and the probability distribution of the mobile position relative to other network elements. A technique is provided for modeling the TDOA error distribution and the a priori mobile position. A method for computing a MAP decision metric is provided using the new probability distribution models. Testing with field data shows that this method yields significant improvement over existing weighted least squares methods.
    • 一种用于改进结合加权最小二乘优化的无线电定位系统的结果的方法,通过使用最大后验(MAP)概率度量来整合加权最小二乘法来并入特定定位问题(例如UTDOA)的特征。 加权最小二乘法通常由TDOA和相关的定位系统(包括TDOA / AOA和TDOA / GPS混合系统)使用。 所结合的特征包括关于TDOA误差的经验信息和相对于其他网络元件的移动位置的概率分布。 提供了一种用于对TDOA误差分布和先验移动位置进行建模的技术。 使用新的概率分布模型提供用于计算MAP决策度量的方法。 使用现场数据进行测试显示,该方法比现有加权最小二乘法有显着改善。
    • 9. 发明授权
    • Doppler-aided positioning, navigation, and timing using broadcast television signals
    • 使用广播电视信号的多普勒辅助定位,导航和定时
    • US08125389B1
    • 2012-02-28
    • US12582051
    • 2009-10-20
    • Guttorm OpshaugJu-Yong DoDimitri Rubin
    • Guttorm OpshaugJu-Yong DoDimitri Rubin
    • G01S3/02
    • G01S19/52G01S19/10
    • Methods having corresponding apparatus and tangible computer-readable media comprise: determining a plurality of first pseudoranges based on a plurality of respective wireless television signals received by an apparatus and a clock signal generated by the apparatus, wherein each of the first pseudoranges represent a difference between a time of transmission of the respective wireless television signal from a respective transmitter and a time of reception of the respective wireless television signal at the apparatus and a time offset of the clock signal; determining a plurality of first estimates of frequency offsets of the wireless television signals received by the apparatus; and determining a first estimate of a location of the apparatus based on the first pseudoranges, the first frequency offsets of the wireless television signals, and locations of the transmitters.
    • 具有对应装置和有形计算机可读介质的方法包括:基于由装置接收的多个相应的无线电视信号和由该装置产生的时钟信号确定多个第一伪距,其中第一伪距中的每一个表示 各个无线电视信号从相应的发射机发送的时间和在该设备处的相应无线电视信号的接收时间和时钟信号的时间偏移; 确定由所述装置接收的无线电视信号的频率偏移的多个第一估计; 以及基于所述第一伪距,所述无线电视信号的所述第一频率偏移和所述发射机的位置来确定所述装置的位置的第一估计。
    • 10. 发明授权
    • System for automatically determining cell transmitter parameters to facilitate the location of wireless devices
    • 用于自动确定小区发射机参数的系统,以便于无线设备的位置
    • US07974640B2
    • 2011-07-05
    • US12847419
    • 2010-07-30
    • Robert J. Anderson
    • Robert J. Anderson
    • H04W24/00H04M11/04
    • H04W64/00G01S5/0036G01S5/0226G01S5/10
    • Several techniques for locating wireless devices involve the Mobile Stations (MS) making measurements of the signals transmitted by geographically distributed base stations within a wireless network. If some key site information is known about these transmitters, such as the transmitter location, transmit signal power, signal propagation, and transmit signal timing, measurements of these transmit signals by a MS can be used to determine the position of the MS. An automatic method to detect transmitters, identify key transmitter information, and utilize the base station transmit signals to perform location is presented. In addition, this method facilitates the use of cell site transmit signals that are part of multiple wireless networks.
    • 用于定位无线设备的几种技术涉及移动站(MS),以对无线网络内的地理分布式基站发送的信号进行测量。 如果关于这些发射机的一些关键站点信息,例如发射机位置,发射信号功率,信号传播和发射信号定时,则可以使用MS对这些发射信号的测量来确定MS的位置。 提出了一种检测发射机,识别关键发射机信息以及利用基站发射信号执行定位的自动方法。 此外,该方法有助于使用作为多个无线网络一部分的小区站点发射信号。