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公开(公告)号：US06987744B2
公开(公告)日：2006-01-17
申请号：US09997282
申请日：2001-11-29
摘要： A system of the present invention is operative for locating a wireless mobile device in communication with a wireless local area network (WLAN) that includes a plurality of cells defining a wireless local area network each having an access point base station. The access point base stations communicate with wireless mobile devices using wireless communication signals as typically spread spectrum communication signals. A processor is operatively connected to each of the access point base stations and operative to process communication signals transmitted from a mobile device and determine which signals are first-to-arrive signals based on a common timing signal and conduct differentiation of the first-to-arrive signals to locate the mobile device.
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2.发明授权
公开(公告)号：US6127976A
公开(公告)日：2000-10-03
申请号：US390030
申请日：1999-09-02
申请人： Robert W. Boyd , David J. Stryker , Ronald J. Hash , Donald K. Belcher , Michael A. Wohl , Timothy C. Harrington
发明人： Robert W. Boyd , David J. Stryker , Ronald J. Hash , Donald K. Belcher , Michael A. Wohl , Timothy C. Harrington
CPC分类号： G06K17/00 , G01S5/0081 , G01S5/06 , G06K2017/0045
摘要： A distributed radio geo-location and tracking system has a distributed subsystem architecture that distributes its processing workload over a plurality of information handling and processing subsystems. For maximum detection capability, each of a plurality of tag emission receivers is equipped with a circularly polarized, omnidirectional antenna, to provide hemispherical coverage. The receivers are coupled to a partitioned plurality of detection processors, that are coupled via distributed association processors to multiple location processors. Each detection processor demodulates and time stamps received energy correlated to known spreading codes of the tags, to associate received energy with only one tag. It transmits a message containing this information over a communication framework to an association processor. The computational load is equitably distributed by a flow control mechanism among available association processors, with all receptions of a single tag transmission being directed to the same association processor. An association processor organizes received messages by tag and time-of-arrival (TOA), and transmits association reports over an association communication process of the communication framework to one of plural distributed location processors. A location processor determines the geographical locations of tags using the TOA information in the association reports.
摘要翻译： 分布式无线电地理位置和跟踪系统具有分布式子系统架构，其通过多个信息处理和处理子系统分配其处理工作负载。 为了获得最大的检测能力，多个标签发射接收器中的每一个配备有圆极化的全向天线，以提供半球形覆盖。 接收器耦合到分隔的多个检测处理器，其经由分布式关联处理器耦合到多个位置处理器。 每个检测处理器解调和接收与标签的已知扩展码相关的接收能量的时间戳，以将接收到的能量与仅一个标签相关联。 它通过通信框架将包含该信息的消息发送到关联处理器。 计算负载由可用的关联处理器之间的流控制机制公平分配，单个标签传输的所有接收都被引导到相同的关联处理器。 关联处理器通过标签和到达时间（TOA）来组织接收到的消息，并且通过通信框架的关联通信过程将关联报告发送到多个分布式位置处理器之一。 位置处理器使用关联报告中的TOA信息确定标签的地理位置。
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3.发明授权Proximity-based magnetic field generator for controlling operation of RF burst-transmitting tags of geolocation system 有权用于控制地理定位系统的RF突发传输标签操作的接近磁场发生器公开(公告)号：US06853687B2
公开(公告)日：2005-02-08
申请号：US09759290
申请日：2001-01-11
CPC分类号： G01V15/00
摘要： An object tracking system for locating radio-tagged objects within a monitored environment has a plurality tag transmission readers that detect RF transmissions from the tags, and generate output signals representative of the time-of-arrival of first-to-arrive tag transmissions. An object location processor processes the first to arrive signals in accordance with a multilateration algorithm to geolocate a tag. In order to modify the operation of a tag that comes within a prescribed region of the monitored environment (such as passing through a doorway), one or more relatively short range, magnetic field proximity-based, tag-programming ‘pingers’, are placed proximate to the region. A magnetic field receiver on the tag detects the field generated by the pinger and causes the tag to change operation such as increase its RF transmission rate.
摘要翻译： 用于在受监视的环境内定位无线电标签对象的对象跟踪系统具有检测来自标签的RF传输的多个标签传输读取器，并且生成表示第一到达标签传输的到达时间的输出信号。 对象位置处理器根据多边算法处理第一个到达信号以对标签进行地理定位。 为了修改在监视环境的规定区域（例如通过门口）中的标签的操作，放置一个或多个相对较短范围的基于磁场邻近的标签编程“平” 靠近该地区。 标签上的磁场接收器检测由指孔产生的场，并使标签改变操作，例如增加其RF传输速率。
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4.发明授权Object identification system employing pulsed magnetic field-stimulated, tag-embedded transponder 有权采用脉冲磁场刺激，标签嵌入式应答器的物体识别系统公开(公告)号：US06170748B2
公开(公告)日：2001-01-09
申请号：US09159554
申请日：1998-09-24
IPC分类号： G06K708
CPC分类号： G06K7/083
摘要： An object orientation-independent information storage and retrieval system ‘tags’ an object with a compact, strip-embedded transponder containing object identification information. The transponder remains unpowered until the tagged object passes through a pulsed time-varying magnetic field generated by a tag reader. In response to a transponder coil sensing this interrogation magnetic field, the transponder extracts and stores energy from the incident field, powering up the transponder and stimulating the emission of an alternating magnetic field reply burst encoded with information stored in memory. The reply burst has the same frequency as the interrogating magnetic field burst, and is emitted by the transponder coil prior to receipt of the next interrogation burst.
摘要翻译： 对象方向独立信息存储和检索系统使用包含对象识别信息的紧凑的带状嵌入式转发器“标记”对象。应答器保持未上电，直到被标记的对象通过由标签读取器产生的脉冲时变磁场 响应于应答器线圈感测到该询问磁场，应答器从入射场提取并存储能量，为应答器供电并且激励用存储在存储器中的信息编码的交变磁场应答脉冲串的发射，响应脉冲串 与询问磁场突发相同的频率，并且在接收到下一询问脉冲之前由应答器线圈发射。
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5.发明授权公开(公告)号：US06393045B1
公开(公告)日：2002-05-21
申请号：US09159553
申请日：1998-09-24
IPC分类号： H04L2730
CPC分类号： G06K19/0723 , G06K7/083
摘要： A magnetic field-based tagged object information storage and retrieval system employs a spread spectrum modulated magnetic field for identifying each of a plurality of tagged objects to which spread spectrum modulation magnetic field transponders are attached. When interrogated by a tag reader, transponders embedded in plural tags generate spread spectrum modulated magnetic fields that are correlated with a reference spreading sequence in a tag reader signal processor to both detect and identify each responding tag.
摘要翻译： 基于磁场的标记对象信息存储和检索系统采用扩频调制磁场来识别扩频调制磁场转发器附着到的多个标记对象中的每一个。 当被标签读取器询问时，嵌入在多个标签中的转发器产生与标签读取器信号处理器中的参考扩展序列相关的扩频调制磁场，以检测和识别每个响应标签。
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6.发明授权公开(公告)号：US06892054B2
公开(公告)日：2005-05-10
申请号：US10033529
申请日：2001-12-28
CPC分类号： G01S5/0215 , H04B7/086 , H04W64/00 , H04W84/12 , H04W88/08
摘要： A wireless local area network and location system for locating objects within a monitored environment are disclosed. A plurality of access point stations receive and transmit communication signals within a wireless local area network. A processor is operatively connected to each of the access point stations and operative for processing communication signals received from the mobile station and, in one embodiment, determining which communication signals are first-to-arrive signals and conducting differentiation of the first-to-arrive signals to locate a mobile station. Delayed versions of at least one interference signal are weighted and the amplitude and phase controlled with weighted functions W1, W2 . . . Wn. The resultant weighted replicas are summed to determine an approximation of disbursed interference for cancelling interference. The location system can include a tag transmitter and spaced monitoring receivers and processor.
摘要翻译： 公开了一种用于在受监视的环境内定位对象的无线局域网和定位系统。 多个接入点站在无线局域网内接收和发送通信信号。 处理器可操作地连接到每个接入点站并且用于处理从移动站接收的通信信号，并且在一个实施例中，确定哪些通信信号是首先到达信号并且进行第一到达的区分 信号来定位移动台。 加权至少一个干扰信号的延迟版本，并且用加权函数W 1，W 2 2控制振幅和相位。 。 。 W 。 将所得到的加权副本相加以确定用于消除干扰的已发送干扰的近似值。 位置系统可以包括标签发射器和间隔的监视接收器和处理器。
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7.发明授权Computer workstation tool for displaying performance estimate of tagged object geo-location system for proposed geometry layout of tag transmission readers 有权用于显示标签对象地理定位系统的性能估计的计算机工作站工具，用于提出标签传输读取器的几何布局公开(公告)号：US06366242B1
公开(公告)日：2002-04-02
申请号：US09626021
申请日：2000-07-27
IPC分类号： G01S302
CPC分类号： G01C21/206 , G01S1/042 , G01S5/02 , G01S5/021 , G01S5/04 , G01S5/06 , G01S5/10 , G01S13/767 , G01S13/82 , G01S13/825 , G01S13/878 , G06K7/0008 , G06K7/10079 , G06K2017/0045
摘要： A reader geometry visualization tool for a geo-location system technician's personal computer is operative to display a map of an asset management environment. The technician interactively places and manipulates a distribution of tag transmission readers and any potential impairments to RF transmissions on the map. The locations of the readers (and any impairments) are coupled as input parameters to a mathematical model of a tag-based geo-location system. The performance of the map-parameterized geo-location system model is then computed as a geometric dilution of precision (gdop) value for the intended object coverage area. The computed (gdop) performance is visually characterized on the displayed map, as by way of different colors to indicate how accurately the proposed reader geometry will enable the system to locate objects anywhere in the coverage area.
摘要翻译： 用于地理位置系统技术人员的个人计算机的读取器几何可视化工具可操作以显示资产管理环境的地图。 技术人员交互地放置和操纵标签传输读取器的分布以及对地图上的RF传输的任何潜在的损害。 读取器的位置（以及任何损伤）作为输入参数耦合到基于标签的地理定位系统的数学模型。 然后，计算地图参数化地理位置系统模型的性能，作为目标对象覆盖区域的精度（gdop）值的几何稀释度。 所计算的（gdop）性能在显示的地图上以视觉特征表示，作为不同的颜色，以指示所提出的读取器几何将如何准确地使得系统能够在覆盖区域的任何地方定位对象。
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8.发明授权Radio geo-location system with advanced first received wavefront arrival determination 有权无线电地理定位系统具有先进的首次接收波前到达判定
公开(公告)号：US6121926A
公开(公告)日：2000-09-19
申请号：US442710
申请日：1999-11-19
IPC分类号： G01S1/04 , G01S5/02 , G01S5/04 , G01S5/06 , G01S13/76 , G01S13/82 , G01S13/87 , G01S19/11 , G06K7/00 , G06K17/00 , G01S3/02
CPC分类号： G01S5/06 , G01S1/042 , G01S13/767 , G01S13/82 , G01S13/878 , G01S5/02 , G01S5/021 , G01S5/04 , G06K7/0008 , G06K7/10079 , G01S13/825 , G06K2017/0045
摘要： An asset management radio location system uses time-of-arrival differentiation for random and repetitive spread spectrum, short duration pulse `blinks` from object-attached tags, to provide a practical, continuous identification of the location of each and every object within an environment of interest, irrespective whether the object is stationary or moving. Correlation-based RF processors determine which signals received spatially diverse antennas coupled to tag transmission readers are first-to-arrive signals as transmitted from any blinking tag. An object location processor carries out time-of-arrival differentiation of first-to-arrive transmissions from any blinking tag to determine where the respective object is located within the environment.
摘要翻译： 资产管理无线电定位系统使用随机和重复扩频的到达时间差异化，来自对象附加标签的短持续时间脉冲“闪烁”，以提供对环境中每个对象的位置的实际连续识别 感兴趣的，无论物体是静止的还是移动的。 基于相关性的RF处理器确定接收到与标签传输读取器相耦合的空间多样的天线的哪些信号是从任何闪烁标签发送的首先到达信号。 对象位置处理器执行从任何闪烁标签到达的到达传输的到达时间差异，以确定相应对象在环境内的位置。
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公开(公告)号：US07212563B2
公开(公告)日：2007-05-01
申请号：US10138795
申请日：2002-05-03
IPC分类号： H04B1/00
CPC分类号： G01S5/0221 , G01S5/02 , G01S5/0226 , H04B1/7075 , H04B2201/70715
摘要： A location system includes a plurality of signal readers for receiving signals from a wireless transmitter to be located. The signals include a wideband, spread spectrum signal and a timing marker appended a predetermined time in front of the wideband, spread spectrum signal for indicating the presence of the wideband, spread spectrum signal. A location processor is operatively coupled to the signal readers for detecting the timing markers of signals and responsive to a detection of a timing marker, correlating a signal as a first-to-arrive signal and conducting differentiation of first-to-arrive signals to locate a wireless transmitter.
摘要翻译： 位置系统包括用于从要定位的无线发射机接收信号的多个信号读取器。 信号包括宽带扩频信号和附加在用于指示宽带扩频信号的存在的宽带扩频信号前面的预定时间的定时标记。 位置处理器可操作地耦合到信号读取器，用于检测信号的定时标记并且响应于定时标记的检测，将信号作为第一到到信号进行相关，并且对第一到到达信号进行区分以定位 无线发射机。
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公开(公告)号：US5995046A
公开(公告)日：1999-11-30
申请号：US239399
申请日：1999-01-28
IPC分类号： G01S1/04 , G01S5/02 , G01S5/04 , G01S5/06 , G01S13/76 , G01S13/82 , G01S13/87 , G01S19/11 , G06K7/00 , G06K17/00 , G01S3/02
CPC分类号： G01S5/06 , G01S1/042 , G01S13/767 , G01S13/82 , G01S13/878 , G01S5/02 , G01S5/021 , G01S5/04 , G06K7/0008 , G06K7/10079 , G01S13/825 , G06K2017/0045
摘要： An asset management radio location system uses time-of-arrival differentiation for random and repetitive spread spectrum, short duration pulse `blinks` from object-attached tags, to provide a practical, continuous identification of the location of each and every object within an environment of interest, irrespective whether the object is stationary or moving. Correlation-based RF processors determine which signals received spatially diverse antennas coupled to tag transmission readers are first-to-arrive signals as transmitted from any blinking tag. An object location processor carries out time-of-arrival differentiation of first-to-arrive transmissions from any blinking tag to determine where the respective object is located within the environment.
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