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公开(公告)号：US07228228B2
公开(公告)日：2007-06-05
申请号：US10416804
申请日：2001-11-14
IPC分类号： G06F19/00
CPC分类号： G01S5/021 , G01S1/08 , G01S5/0226 , G01S5/14 , G01S11/02
摘要： The present invention provides a tracking system in which a mobile tag having an unknown position, which tag is to be tracked in space over time, transmits a signal comprising a pair of tones at different frequencies. The transmitted signal is received at each of three receivers, each having a known location, where the phase of each of the tones within the signal is measured. The measured phases are passed to a processing unit which determines the position of the tag at the time of transmission of the signal on the basis of the difference between the measured phases of the two tones. The tracking system operates over a defined finite range to track the position of the mobile tag uniquely in space.
摘要翻译： 本发明提供了一种跟踪系统，其中具有未知位置的移动标签，该标签将随着时间在空间中跟踪，发送包括不同频率的一对音调的信号。 发送的信号在三个接收机中的每一个接收，每个接收机具有已知位置，其中测量信号内每个音调的相位。 测量的相位被传递到处理单元，该处理单元基于两个音调的测量相位之间的差来确定在信号发送时标签的位置。 跟踪系统在限定的有限范围内运行，以在空间中唯一地跟踪移动标签的位置。
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公开(公告)号：US20070066231A1
公开(公告)日：2007-03-22
申请号：US11492200
申请日：2006-07-25
CPC分类号： G01S19/26 , G01S5/0045 , G01S5/021 , G01S5/10 , G01S19/05 , G01S19/252 , G01S19/256 , H04B17/21
摘要： A method of and system for calibrating un-calibrated time information within a mobile terminal 101 is disclosed. The terminal has a receiver 203 capable of receiving signals from which calibrated time information carried by a calibrated system (a satellite positioning system) can be extracted, and a receiver 200 capable of receiving signals from which un-calibrated time information carried by an un-calibrated stable system (a cellular communications system) may be extracted. The time offset between calibrated time information extracted from the calibrated system and un-calibrated time information extracted from the un-calibrated stable system is determined at a first terminal position where the signals from the un-calibrated stable system are available, the travel times of the signals from the un-calibrated stable system are known or determined, and the signals from the calibrated system are available. The un-calibrated time information extracted from signals of the un-calibrated stable system received at a second terminal position is calibrated from known or determined travel times of the signals from the un-calibrated stable system at the second terminal position and the time offset which has been determined.
摘要翻译： 公开了一种用于在移动终端101内校准未校准的时间信息的方法和系统。 终端具有能够接收由校准系统（卫星定位系统）携带的校准时间信息可以被提取的信号的接收机203，以及接收机200，其能够接收未被校准的时间信息携带的信号， 可以提取校准的稳定系统（蜂窝通信系统）。 在从未校准的稳定系统的信号可用的第一终端位置处确定从校准系统提取的校准时间信息与从未校准的稳定系统提取的未校准时间信息之间的时间偏移， 来自未校准的稳定系统的信号是已知或确定的，并且来自校准系统的信号可用。 从在第二终端位置处接收的未校准稳定系统的信号中提取的未校准时间信息从在第二终端位置处未校准稳定系统的信号的已知或确定的行进时间校准， 已经确定
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公开(公告)号：US20050259763A1
公开(公告)日：2005-11-24
申请号：US10525829
申请日：2003-08-18
摘要： The invention provides a method of estimating the time offsets between signals transmitted by plural transmitters of a communications network and received by a receiver attached to a terminal. In the method a section of a representation of the signals from the plural transmitters received by the receiver at the terminal (a “terminal section”) is created as are a first section of a representation of the signal transmitted by a first of said transmitters and a second section of a representation of the signal transmitted by a second of said transmitters. Each of the first and second sections overlaps in time with the terminal section. Using the first section, the second section and a set of signal parameters, including initial estimates of the time offsets between the first section and the terminal section and between the second section and the terminal section, a model of a section of a representation of the composite signal received by the receiver from the first and second transmitters is created. Thereafter, the model is compared with the terminal section and the set of signal parameters including the time offset estimates is refined to minimise the difference between the model and the terminal section. The time offsets in the refined parameter set used to minimise the difference between said model and the terminal section, are adopted as the estimated time offsets between the first section and the terminal section and between the second section and the terminal section.
摘要翻译： 本发明提供一种估计由通信网络的多个发射机发送并由附接到终端的接收机接收的信号之间的时间偏移的方法。 在该方法中，创建由接收机在终端（“终端部分”）处接收的来自多个发射机的信号的表示部分，以及由第一所述发射机发射的信号的表示的第一部分，以及 由第二所述发射机发送的信号的表示的第二部分。 第一和第二部分中的每一个在时间上与终端部分重叠。 使用第一部分，第二部分和一组信号参数，包括第一部分和终端部分之间以及第二部分和终端部分之间的时间偏移的初始估计，一个表示的部分的模型 创建由接收机从第一和第二发射机接收的复合信号。 此后，将模型与终端部分进行比较，并且包括时间偏移估计的信号参数集合被改进以最小化模型和终端部分之间的差异。 采用用于最小化所述模型和终端部分之间的差异的精细参数集中的时间偏移作为第一部分和终端部分之间以及第二部分和终端部分之间的估计时间偏移。
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公开(公告)号：US20080070589A1
公开(公告)日：2008-03-20
申请号：US11978575
申请日：2007-10-30
申请人： Paul Hansen , Peter Duffett-Smith , Anthony Pratt
发明人： Paul Hansen , Peter Duffett-Smith , Anthony Pratt
CPC分类号： G01S5/0036 , G01S5/0054 , G01S5/0284 , G01S5/10 , G01S19/252 , G01S19/51
摘要： The invention provides a method of combining satellite positioning system signals and position information derived from such signals in a mobile terminal, when these are available at a first location, with cellular communication signals and a method, system and apparatus for determining the approximate position information for the said mobile terminal when SPS signals are not available at a second location. The approximate position is determined in the mobile terminal only using a position difference vector derived from the cellular communication signals using time offsets and associated time-tags in a method based on the observed time difference of arrival. The computations of cellular position and position difference information are made within the network infrastructure. The invention provides for the security of the user as only position difference information is communicated over the air interface, or transmission time offset measurements which require non-transmitted information to determine a solution. In a further aspect of the invention, the approximate position information is used to provide position assistance information to an SPS receiver for the purposes of (a) satellite signal acquisition with reduced search time and/or (b) initial position information for the calculation of SPS location which thereby avoids the ‘integer ambiguity’ problem resulting from the repetitive nature of the SPS ranging signals.
摘要翻译： 本发明提供一种在卫星定位系统信号和来自移动终端中的这些信号的位置信息的方法，当这些信号在第一位置可用时，具有蜂窝通信信号，以及用于确定大体位置信息的方法，系统和装置 当SPS信号在第二位置不可用时，所述移动终端。 在基于观察到的到达时间差的方法中，仅使用从蜂窝通信信号导出的位置差矢量使用时间偏移和相关联的时间标签来确定近似位置。 蜂窝位置和位置差异信息的计算在网络基础设施内进行。 本发明提供了用户的安全性，因为只有位置差异信息通过空中接口进行通信，或传输时间偏移测量需要未发送信息来确定解决方案。 在本发明的另一方面，近似位置信息用于向SPS接收机提供位置辅助信息，用于（a）具有减少的搜索时间的卫星信号获取和/或（b）用于计算 SPS位置，从而避免了由SPS测距信号的重复性质导致的“整数模糊”问题。
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公开(公告)号：US20050200525A1
公开(公告)日：2005-09-15
申请号：US10518073
申请日：2003-05-13
CPC分类号： H04B1/71072 , G01S5/02 , G01S5/0215
摘要： The present invention sets out to overcome the hearability problem in CDMA communications networks in which positioning services are provided, by using a separate sampling device (204, 205, 206) for each transmitter (201, 202, 203), which sends to the computing device (208) a representation of the signals transmitted only by that transmitter. A cross-correlation of the representation sent back by the mobile terminal (207) with the representation sent back by the sampling device in the brightest transmitter is performed in the computing device (208), and a blurred estimate of that brightest signal is subtracted from a blurred version of the representation sent back by the mobile terminal (207) in order to reduce its effect on the remaining signals as far as possible. The cross-correlation and subtraction steps are iterated until no useful signals remain to be extracted.
摘要翻译： 本发明旨在通过为每个发射机（201,202,203）使用单独的采样设备（204,205,206）来克服在其中提供定位服务的CDMA通信网络中的可听性问题，其发送到计算 设备（208）仅由该发射机传输的信号的表示。 在计算设备（208）中执行由移动终端（207）发回的表示与采样设备在最亮发射机中发回的表示的互相关，并且从最小信号中减去最亮信号的模糊估计 由移动终端（207）发回的表示的模糊版本，以便尽可能地减少对剩余信号的影响。 迭代相关和减法步骤，直到没有有用的信号保持提取。
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