公开(公告)号：US20150198694A1

公开(公告)日：2015-07-16

申请号：US14667348

申请日：2015-03-24

Applicant: Texas Instruments Incorporated

Inventor： Deric Wayne Waters ,  Jayawardan Janardhanan

IPC: G01S5/02 ,  G01S5/14

CPC classification number: G01S19/48 ,  G01S5/0252 ,  G01S5/0263 ,  G01S5/14 ,  G01S19/03 ,  G01S19/46

Abstract: A positioning server has a positioning database. The positioning database is configured to store information relating wireless local area network (WLAN) access point (AP) signal measurements to points of a geographic positioning grid. motion information provided by dead-reckoning systems of a plurality of wireless devices and reference location information provided by at least one of a satellite positioning system and a wireless local area network (WLAN) positioning system of each wireless device is also stored. WLAN access point (AP) signal measurements acquired by each wireless device in correspondence with the motion information is stored as are non-causally determine positions of the wireless devices based on the motion information and reference locations. Positioning server is also configured to generate a geographic positioning grid that relates the AP signal measurements to points of the positioning grid based on the determined positions.

Abstract translation: 定位服务器具有定位数据库。 定位数据库被配置为将关于无线局域网（WLAN）接入点（AP）信号测量的信息存储在地理定位网格的点上。 还存储由多个无线设备的推算系统提供的运动信息和由每个无线设备的卫星定位系统和无线局域网（WLAN）定位系统中的至少一个提供的参考位置信息。 根据运动信息和参考位置非根本地确定无线设备的位置，存储与运动信息相对应的每个无线设备获取的WLAN接入点（AP）信号测量。 定位服务器还被配置为基于确定的位置生成将AP信号测量与定位网格的点相关联的地理定位网格。

公开(公告)号：US20140171108A1

公开(公告)日：2014-06-19

申请号：US13852073

申请日：2013-03-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Deric Wayne Waters ,  Ariton E. Xhafa ,  Mohamed Farouk Mansour

IPC: H04W4/02

CPC classification number: B81C1/00984 ,  B81B3/0005 ,  B81B7/0032 ,  B81C1/00261 ,  B81C1/0096 ,  B81C2201/112 ,  H01L21/02112 ,  H04W4/02 ,  Y10S257/914

Abstract: A wireless device that includes an access point (AP) scanner, a transceiver, and a controller coupled to the AP scanner and transceiver. The AP scanner is configured to scan wireless network channels utilized by one or more APs to transmit data packets, probe responses, and beacons. The transceiver is configured to transmit one or more probe requests to the one or more APs and receive one or more probe responses and beacons from the one or more APs. The controller is configured to determine a proximate geographic position of the wireless device based on signal strength of the one or more probe responses and beacons received from the one or more APs. The controller also dynamically adapts a parameter utilized in determining the proximate geographic position of the wireless device.

Abstract translation: 一种包括接入点（AP）扫描器，收发器和耦合到AP扫描器和收发器的控制器的无线设备。 AP扫描器被配置为扫描由一个或多个AP使用的无线网络信道以发送数据分组，探测响应和信标。 收发器被配置为向一个或多个AP发送一个或多个探测请求，并从一个或多个AP接收一个或多个探测响应和信标。 控制器被配置为基于从一个或多个AP接收的一个或多个探测响应和信标的信号强度来确定无线设备的邻近地理位置。 控制器还动态地适配用于确定无线设备的最近地理位置的参数。

公开(公告)号：US20130131983A1

公开(公告)日：2013-05-23

申请号：US13745186

申请日：2013-01-18

Applicant: Texas Instruments Incorporated

Inventor： June Chul Roh ,  Deric Wayne Waters ,  Srinath Hosur ,  Goutam Dutta

IPC: G01S19/47 ,  G06F17/16 ,  G01C22/00

CPC classification number: G01S19/47 ,  G01C21/165 ,  G01C21/28 ,  G01C22/006 ,  G06F17/16

Abstract: Embodiments of the invention provide a step detection. An accelerometer measurement in the form of a multi-dimensional acceleration vector is obtained. The magnitude of the accelerometer measurement is filtered using a low pass filter. A threshold for a down-crossing is provided as is a threshold for an up-crossing. A step detection is triggered if the magnitude of the accelerometer measurement is greater than or equal to the threshold for an up-crossing.

Abstract translation: 本发明的实施例提供了步骤检测。 获得多维加速度矢量形式的加速度计测量。 使用低通滤波器对加速度计测量的幅度进行滤波。 提供了一个下划线的阈值，就像上一交叉口的阈值一样。 如果加速度计测量的幅度大于或等于上行阈值，则触发步进检测。