公开(公告)号：US20060240846A1

公开(公告)日：2006-10-26

申请号：US11419657

申请日：2006-05-22

申请人： Tarun Bhattacharya ,  Martin Feuerstein ,  Scot Gordon ,  David Spain

发明人： Tarun Bhattacharya ,  Martin Feuerstein ,  Scot Gordon ,  David Spain

IPC分类号： H04Q7/20

CPC分类号： G01S5/0252 ,  G01S5/021 ,  G01S19/06 ,  G01S19/17 ,  G01S19/252 ,  H04W64/00

摘要： A technique for estimating the location of a wireless terminal at an unknown location in a geographic region is disclosed. The technique is based on the recognition that there are traits of electromagnetic signals that are dependent on topography, the receiver, the location of the transmitter, and other factors. For example, if a particular radio station is known to be received strongly at a first location and weakly at a second location, and a given wireless terminal at an unknown location is receiving the radio station weakly, it is more likely that the wireless terminal is at the second location than at the first location.

摘要翻译： 公开了一种用于估计地理区域中的未知位置处的无线终端的位置的技术。 该技术基于认识到存在依赖于地形，接收机，发射机的位置等因素的电磁信号的特征。 例如，如果已知特定的无线电台在第一位置被强烈地接收并且在第二位置处较弱地接收，并且在未知位置的给定的无线终端较弱地接收无线电台，那么无线终端更有可能是 在第二个位置比在第一个位置。

公开(公告)号：US20060211376A1

公开(公告)日：2006-09-21

申请号：US11080861

申请日：2005-03-15

申请人： Tarun Bhattacharya ,  Martin Feuerstein ,  David Spain

发明人： Tarun Bhattacharya ,  Martin Feuerstein ,  David Spain

IPC分类号： H04B17/00

CPC分类号： H04W64/00 ,  G01S5/0252

摘要： A process and machine for estimating the location of a wireless terminal is disclosed. The illustrative embodiment of the present invention is based on the observation that the signal strength of a signal from a transmitter is different at some locations, and, therefore, the location of a wireless terminal can be estimated by comparing the signal strength it currently observes against a map or database that correlates locations to signal strengths. In accordance with a first example, if a particular radio station is known to be received well at a first location and poorly at a second location, and a given wireless terminal at an unknown location is receiving the radio station poorly, it is more likely that the wireless terminal is at the second location than it is at the first location.

摘要翻译： 公开了一种用于估计无线终端的位置的过程和机器。 本发明的说明性实施例基于以下观察：来自发射机的信号的信号强度在某些位置不同，因此无线终端的位置可以通过将当前观察到的信号强度与 将位置与信号强度相关联的地图或数据库。 根据第一示例，如果已知在第一位置处良好地接收特定无线电台并且在第二位置处不良地接收到特定无线电台，并且在未知位置处的给定无线终端正在接收无线电台，则更可能的是， 无线终端处于比在第一位置处的第二位置。

公开(公告)号：US20050014518A1

公开(公告)日：2005-01-20

申请号：US10798988

申请日：2004-03-12

申请人： David Spain ,  Robert Martin ,  Tarun Bhattacharya

发明人： David Spain ,  Robert Martin ,  Tarun Bhattacharya

IPC分类号： G01S19/03 ,  G01S5/02 ,  H04W64/00 ,  H04Q7/20

CPC分类号： H04W64/00 ,  G01S5/0252

摘要： A method of estimating the location of a wireless terminal is disclosed. The illustrative embodiment of the present invention is based on the observation that the signal strength of a signal from a transmitter is different at some locations, and, therefore, the location of a wireless terminal can be estimated by comparing the signal strength it currently observes against a map or database that correlates locations to signal strengths. Furthermore, the illustrative embodiment deduces the signal strength of one or more base stations' control channels at the wireless terminal based on the principal of reciprocity, whether or not the wireless terminal can actually receive the base stations' control channels but so long as the base station can receive and measure the uplink signal from the wireless terminal. The deduced signal-strength measurements can then used—alone or in combination with the empirical signal-strength measurements—to estimate the location of the wireless terminal.

摘要翻译： 公开了一种估计无线终端位置的方法。 本发明的说明性实施例基于以下观察：来自发射机的信号的信号强度在某些位置不同，因此无线终端的位置可以通过将当前观察到的信号强度与 将位置与信号强度相关联的地图或数据库。 此外，说明性实施例基于互易原则来推断无线终端上的一个或多个基站控制信道的信号强度，无论无线终端是否可以实际接收基站的控制信道，但是只要基站 站可以从无线终端接收和测量上行链路信号。 然后推断的信号强度测量可以单独使用或与经验信号强度测量结合使用，以估计无线终端的位置。

公开(公告)号：US20060240841A1

公开(公告)日：2006-10-26

申请号：US11419640

申请日：2006-05-22

申请人： Tarun Bhattacharya

发明人： Tarun Bhattacharya

IPC分类号： H04Q7/20

CPC分类号： H04W64/00 ,  G01S5/021 ,  G01S5/0252 ,  G01S19/06 ,  G01S19/17 ,  G01S19/252 ,  H04W84/06

摘要： A method of using a non-GPS-derived technique to estimate the location of an Assisted-GPS-enabled wireless terminal for the purposes of generating location-specific assistance data for the wireless terminal is disclosed. The wireless terminal then uses the assistance data to acquire and process one or more GPS signals and to derive information that is probative of the wireless terminal's location. The GPS-derived location information is then combined with non-GPS-derived location to form an estimate of the location of the wireless terminal that is better than can be derived from either alone. This combination of GPS-derived and non-GPS techniques is particularly useful when the wireless terminal can only acquire one or two GPS signals because it is not possible to determine the location of the wireless terminal with only two GPS signals alone.

摘要翻译： 公开了一种使用非GPS导出技术估计辅助GPS功能的无线终端的位置，以便为无线终端生成位置特定辅助数据的目的。 然后，无线终端使用辅助数据来获取和处理一个或多个GPS信号，并且导出证明无线终端的位置的信息。 然后将GPS导出的位置信息与非GPS导出的位置相结合，以形成无线终端位置的估计，该估计优于单独导出的。 当无线终端只能获取一个或两个GPS信号时，GPS导出和非GPS技术的这种组合是特别有用的，因为不可能仅仅使用两个GPS信号来确定无线终端的位置。