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公开(公告)号：US08199050B2
公开(公告)日：2012-06-12
申请号：US13240964
申请日：2011-09-22
IPC分类号： G01S19/45
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.
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。
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公开(公告)号：US20080261614A1
公开(公告)日：2008-10-23
申请号：US11736950
申请日：2007-04-18
IPC分类号： H04Q7/20
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：US08045506B2
公开(公告)日：2011-10-25
申请号：US11736868
申请日：2007-04-18
IPC分类号： H04Q11/00
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：US20080261611A1
公开(公告)日：2008-10-23
申请号：US11736868
申请日：2007-04-18
IPC分类号： H04Q7/20
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.
摘要翻译： 在覆盖层中，基于U-TDOA的无线定位系统，通常与BTS共处的LMU用于在前向和反向信道中收集无线电信令。 技术用于补偿在U-TDOA服务区域的部分是上行链路解调或下行链路信标发现受限的稀疏LMU部署。
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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：US07804448B2
公开(公告)日：2010-09-28
申请号：US12615021
申请日：2009-11-09
CPC分类号： G01S5/06 , G01S5/0072
摘要： Iterative geolocation of a stationary RF emitter through the use of TDOA may include the use of a single portable geolocation (e.g., TDOA) sensor, a pair of portable geolocation sensors and three of more portable geolocation sensors. Adding portable geolocation sensors to the iterative process reduces the constraints on the signals to be located as well as providing a reduction in the number of iterations required to obtain improved location accuracy.
摘要翻译： 通过使用TDOA，固定RF发射器的迭代地理定位可以包括使用单个便携式地理位置（例如，TDOA）传感器，一对便携式地理位置传感器和三个更便携式地理位置传感器。 将可移动地理位置传感器添加到迭代过程中减少了对要定位的信号的约束，并且减少了获得改进的位置精度所需的迭代次数。
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