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31.发明授权公开(公告)号：US07667649B2
公开(公告)日：2010-02-23
申请号：US11953585
申请日：2007-12-10
IPC分类号： G01S3/02
CPC分类号： H04B1/7075 , G01S5/0215 , G01S5/06 , H04B17/27 , H04B17/391
摘要： In a Wireless Location System (WLS) deployed in connection with a CDMA-based wireless communications system, Location Measurement Units are used to collect multi-path corrupted radio signaling for use in time difference of arrival (TDOA) and hybrid positioning methods. Signal processing techniques are used to enhance the WLS's ability to determine the minimally time-delayed multi-path component and thus increase the accuracy of the TDOA location in CDMA-based wireless communications systems. The signal processing includes a filtering technique for reducing the leading sidelobes of the cross-correlation function as well as a leading edge discovery procedure.
摘要翻译： 在与基于CDMA的无线通信系统相结合的无线定位系统（Wireless Location System，WLS）中，使用位置测量单元收集多路径损坏的无线电信令，用于到达时差（TDOA）和混合定位方法。 信号处理技术用于提高WLS确定最小时延多径分量的能力，从而提高基于CDMA的无线通信系统中TDOA位置的准确性。 信号处理包括用于减少互相关函数的前导旁瓣以及前沿发现过程的滤波技术。
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32.发明申请公开(公告)号：US20120082255A1
公开(公告)日：2012-04-05
申请号：US13324289
申请日：2011-12-13
CPC分类号： H04W64/00 , G01S5/0036 , G01S5/0226 , G01S5/10
摘要： One embodiment takes the form of a system for locating wireless transmitters employing an Orthogonal Frequency Division Multiplexing (OFDM) digital modulation scheme, which 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.
摘要翻译： 一个实施例采用用于定位采用正交频分复用（OFDM）数字调制方案的无线发射机的系统的形式，其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。
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公开(公告)号：US08140092B2
公开(公告)日：2012-03-20
申请号：US11736950
申请日：2007-04-18
IPC分类号： H04W24/00
摘要： In an overlay, U-TDOA-based, Wireless Location System, LMUs typically co-located with BTSs, are used to collect radio signaling both in the forward and reverse channels. Techniques are used to compensate for sparse LMU deployments where sections of the U-TDOA service area are uplink demodulation or downlink beacon discovery limited.
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公开(公告)号：US20120052835A1
公开(公告)日：2012-03-01
申请号：US12870564
申请日：2010-08-27
CPC分类号： G01S5/0278 , G01S5/0252 , H04W64/00
摘要： A large volume of high accuracy location data is determined in many commercial wireless networks from location based services (LBS) and, in the United States, for E911. Uplink-Time-Difference-of-Arrival (UTDOA) and Assisted GPS (AGPS) are the predominant geolocation technologies providing these high accuracy locations. In the US alone over 10 million wireless subscribers are located every month because they dial the national emergency number “911” on their mobile phones. This rich set of location data provides an a priori distribution of the location of subscribers in the wireless network. All digital wireless communications networks have a mechanism for the subscribers to time synchronize their handsets to the network. This mechanism provides a band of ranges from the serving cell site to the handset. An a posteriori location estimate can be determined very quickly by considering the a priori distribution of callers in the range band that the current subscriber is in.
摘要翻译： 在许多商业无线网络中，从基于位置的服务（LBS）和在美国的E911确定了大量的高精度位置数据。 上行 - 时差到达（UTDOA）和辅助GPS（AGPS）是提供这些高精度位置的主要地理位置技术。 在美国，每个月都有超过1000万无线用户位于他们的手机上拨打国家紧急号码“911”。 这种丰富的位置数据集提供了无线网络中用户位置的先验分布。 所有数字无线通信网络具有用于用户将其手机时间同步到网络的机制。 该机制提供从服务小区站点到手机的范围的频带。 通过考虑当前用户所在的范围频段内的呼叫者的先验分布，可以非常快速地确定后验位置估计。
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公开(公告)号：US20120020320A1
公开(公告)日：2012-01-26
申请号：US12842861
申请日：2010-07-23
IPC分类号： H04W72/04
摘要： In an overlay, network-based, wireless location system, LMUs typically co-located with BTSs are used to collect radio signaling both in the forward and reverse channels for use in TDOA and/or AOA positioning methods. Information broadcast from the radio network and by global satellite navigation system constellations can be received by the LMU and used to reduce the difficulty of initial system configuration and reconfiguration due to radio network changes.
摘要翻译： 在覆盖层中，基于网络的无线定位系统，通常与BTS共同定位的LMU用于在前向和反向信道中收集用于TDOA和/或AOA定位方法的无线电信令。 无线电网络和全球卫星导航系统星座的广播可以由LMU接收，用于降低由于无线电网络变化引起的初始系统配置和重新配置的难度。
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公开(公告)号：US20100039320A1
公开(公告)日：2010-02-18
申请号：US12192057
申请日：2008-08-14
IPC分类号： G01S1/00
CPC分类号： G01S19/46
摘要： A method and apparatus for position determination is provided using measurements from both Global Positioning System (GPS) receivers and terrestrial-based Uplink Time Difference of Arrival (UTDOA) receivers. The method involves the transformation of downlink satellite measurements into equivalent UTDOA measurements by computing comparable cross-correlation coefficients and time differences of arrival with respect to a UTDOA reference station. The method includes a weighting operation whereby the relative weights of the UTDOA measurements and the relative weights of the GPS measurements are adjusted based on a theoretical scaling followed by empirical adjustments. The method further involves the efficient computation and combining of metrics that are used to minimize the weighted error between candidate location solutions and the UTDOA and GPS measurements. This is done efficiently in two dimensions for UTDOA and in three dimensions for GPS measurements by increasing the complexity of searching operations as the optimal location solution is approached. A technique is also described that improves upon a particular location solution by changing the measurement weightings using criteria specific to GPS and UTDOA.
摘要翻译： 使用来自全球定位系统（GPS）接收机和基于地面的上行链路到达时差（UTDOA）接收机的测量来提供用于位置确定的方法和装置。 该方法涉及通过计算相对于UTDOA参考站的可比互相关系数和到达时间差来将下行链路卫星测量转换成等效的UTDOA测量。 该方法包括一个加权操作，其中UTDOA测量的相对权重和GPS测量的相对权重基于经验调整后的理论缩放来调整。 该方法还涉及用于最小化候选位置解决方案与UTDOA和GPS测量之间的加权误差的度量的有效计算和组合。 对于UTDOA，这在二维方面有效地进行，并且通过在接近最佳位置解决方案时通过增加搜索操作的复杂度来进行GPS测量。 还描述了一种技术，其通过使用针对GPS和UTDOA的标准改变测量权重来改进特定位置解决方案。
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公开(公告)号：US20090143018A1
公开(公告)日：2009-06-04
申请号：US11948244
申请日：2007-11-30
IPC分类号： H04B17/00
CPC分类号： G01S5/0289 , G01S5/021 , G01S5/0221 , G01S5/0236 , H04W48/08 , H04W48/16 , H04W64/00 , H04W88/08
摘要： In an overlay, network-based Wireless Location System, Location Measurement Units (LMUs) are used to collect radio signaling both in the forward and reverse channels for use in TDOA and/or AoA positioning methods. Information broadcast from the radio network and by global satellite navigation system constellations can be received by the LMUs and used to reduce the difficulty of initial system configuration and reconfiguration due to radio network changes.
摘要翻译： 在覆盖层中，基于网络的无线定位系统，位置测量单元（LMU）用于在前向和反向信道中收集用于TDOA和/或AoA定位方法的无线电信令。 无线电网络和全球卫星导航系统星座的广播可以由LMU接收，用于降低由于无线电网络变化引起的初始系统配置和重新配置的难度。
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公开(公告)号：US08442538B2
公开(公告)日：2013-05-14
申请号：US12648783
申请日：2009-12-29
IPC分类号： H04W36/00
摘要： For Wireless Communications Networks (WCNs) that support soft handover, cooperator receiver selection for a TDOA, AOA, TDOA/AOA, or hybrid network-based or network-overlay Wireless Location System (WLS) must contend with one or more network base stations as a serving cell. When the active set contains more than one member, two techniques for determining a set of cooperating and demodulating receivers to use in the signal collection for location estimation is disclosed. In one embodiment, the active set members are constructively reduced to a single member that is used as a proxy serving cell. In another embodiment, the information contained in the active set membership is retained and a new set of demodulating and cooperator receivers are generated based on the entire membership of the active set.
摘要翻译： 对于支持软切换的无线通信网络（WCN），针对TDOA，AOA，TDOA / AOA或基于混合网络或网络覆盖无线定位系统（WLS）的合作者接收机选择必须与一个或多个网络基站作为 一个服务单元。 当活动集合包含多于一个成员时，公开了用于确定在用于位置估计的信号收集中使用的一组协作和解调接收机的两种技术。 在一个实施例中，主动集合成员被建设性地简化为用作代理服务小区的单个成员。 在另一个实施例中，包含在活动集合隶属中的信息被保留，并且基于活动集合的整个成员资格生成新的一组解调和合作者接收者。
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公开(公告)号：US08315647B2
公开(公告)日：2012-11-20
申请号：US12980116
申请日：2010-12-28
IPC分类号： H04W24/00
摘要： Disclosed is a method for processing readily available radio network, timing and power information about cellular networks and typical measurements made by the mobile device and network. A probabilistic method is disclosed that uses both time (i.e., range) and power differences with known downlink transmitter antenna characteristics to locate mobiles with accuracy better than cell-ID with ranging, with high capacity, and without the need for field calibration.
摘要翻译： 公开了一种用于处理随时可用的无线电网络，关于蜂窝网络的定时和功率信息以及由移动设备和网络进行的典型测量的方法。 公开了使用已知下行链路发射机天线特性的时间（即范围）和功率差异的概率方法，其具有比具有高容量的测距更精确的小区ID的移动台，并且不需要场校准。
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公开(公告)号：US08204511B2
公开(公告)日：2012-06-19
申请号：US13171780
申请日：2011-06-29
申请人： Rashidus S. Mia
发明人： Rashidus S. Mia
IPC分类号： H04W24/00
CPC分类号： G01S5/0221 , G01S5/06 , G01S5/12 , H04W64/00
摘要： In a wireless location system, a method for determining frame and slot timing information for use in receiving an uplink signal from a user equipment (UE) device assigned to an uplink Dedicated Physical Control Channel (DPCCH) includes receiving signals in the uplink DPCCH at a location measurement unit (LMU) of the WLS. The method also includes detecting a predefined bit pattern known to be present in a plurality of predefined slots of the uplink DPCCH. Next, the frame and slot timing information are determined for the uplink DPCCH based on the detected bit pattern. Finally, the frame and slot timing information is used for collecting uplink signals from the UE for use in location processing.
摘要翻译： 在无线定位系统中，用于确定用于从分配给上行链路专用物理控制信道（DPCCH）的用户设备（UE）设备接收上行链路信号的帧和时隙定时信息的方法包括在上行链路DPCCH中接收信号 位置测量单元（LMU）。 该方法还包括检测已知存在于上行链路DPCCH的多个预定时隙中的预定义位模式。 接下来，基于检测到的位模式，为上行链路DPCCH确定帧时隙定时信息。 最后，帧和时隙定时信息用于收集来自UE的上行链路信号，用于定位处理。
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