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    Pedestrian navigation devices and methods
    31.
    发明授权
    Pedestrian navigation devices and methods 有权

    公开(公告)号：US10371528B2

    公开(公告)日：2019-08-06

    申请号：US14323823

    申请日：2014-07-03

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Jayawardan Janardhanan ,  Jaiganesh Balakrishnan

    IPC: G01C21/12 ,  G01C22/00 ,  G01C21/16 ,  A61B5/11 ,  G01P15/18

    Abstract: Devices and methods for pedestrian navigation are disclosed. In an embodiment, a device includes an accelerometer sensor configured to sense acceleration components associated with a device motion in a plurality of axes of the accelerometer sensor. The acceleration components include stride frequency components and step frequency components. The device includes a processing module communicably associated with the accelerometer sensor. The processing module is configured to process at least a portion of the acceleration components to determine an estimated attitude associated with the device motion with respect to the accelerometer sensor. The processing module is configured to filter out the step frequency components by blocking the stride frequency components. The processing module is further configured to determine the estimated attitude based on the step frequency components to thereby mitigate a bias in the estimated attitude associated with a lateral sway of the device motion.

    Positioning server
    32.
    发明授权
    Positioning server 有权

    公开(公告)号：US09891326B2

    公开(公告)日：2018-02-13

    申请号：US14667348

    申请日：2015-03-24

    Applicant: Texas Instruments Incorporated

    Inventor： Deric Wayne Waters ,  Jayawardan Janardhanan

    IPC: G01S3/02 ,  G01S19/48 ,  G01S5/02 ,  G01S5/14 ,  G01S19/03 ,  G01S19/46

    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.

    System for crowd-sourced fingerprinting
    33.
    发明授权
    System for crowd-sourced fingerprinting 有权

    公开(公告)号：US09874641B2

    公开(公告)日：2018-01-23

    申请号：US14667280

    申请日：2015-03-24

    Applicant: Texas Instruments Incorporated

    Inventor： Deric Wayne Waters ,  Jayawardan Janardhanan

    IPC: G01S19/05 ,  G01S19/46 ,  G01S19/48 ,  G01S5/02 ,  G01S5/14 ,  G01S19/03

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

    Abstract: A system for crowd-sourced fingerprinting has a positioning database and a mobile wireless device. The positioning database is configured to store information relating wireless local area network access point (AP) signal measurements to points of a geographic positioning grid. The mobile wireless device has a satellite positioning system, a transceiver, a motion measurement system, and position estimation logic. The position estimation logic is configured to determine a reference location as the device passes between areas of satellite positioning signal reception and satellite positioning signal non-reception. The device further configured to record measurements of movements provided by the motion measurement system and measurements of signals provided by the transceiver within areas of non-reception and to provide results to the positioning database.

    Attitude estimation for pedestrian navigation using low cost MEMS accelerometer in mobile applications, and processing methods, apparatus and systems
    36.
    发明授权
    Attitude estimation for pedestrian navigation using low cost MEMS accelerometer in mobile applications, and processing methods, apparatus and systems 有权
    在移动应用中使用低成本MEMS加速度计的行人导航姿态估计，以及处理方法，装置和系统

    公开(公告)号：US09121714B2

    公开(公告)日：2015-09-01

    申请号：US14180488

    申请日：2014-02-14

    Applicant: Texas Instruments Incorporated

    Inventor： Jayawardan Janardhanan ,  Goutam Dutta ,  Varun Tripuraneni

    IPC: G01C21/16 ,  G01C21/20 ,  G01C22/00

    CPC classification number: G01C21/16 ,  G01C21/165 ,  G01C21/20 ,  G01C22/006

    Abstract: A user-heading determining system (10) for pedestrian use includes a multiple-axis accelerometer (110) having acceleration sensors; a device-heading sensor circuit (115) physically situated in a fixed relationship to the accelerometer (110); an electronic circuit (100) operable to generate signals representing components of acceleration sensed by the accelerometer (110) sensors, and to electronically process at least some part of the signals to produce an estimation of attitude of a user motion with respect to the accelerometer, and further to combine the attitude estimation (750, α) with a device heading estimation (770, ψ) responsive to the device-heading sensor circuit, to produce a user heading estimation (780); and an electronic display (190) responsive to the electronic circuit (100) to display information at least in part based on the user heading estimation. Other systems, circuits and processes are also disclosed.

    Abstract translation: 用于行人使用的用户航向确定系统（10）包括具有加速度传感器的多轴加速度计（110） 物理地位于与所述加速度计（110）固定关系的设备航向传感器电路（115）; 电子电路（100），其可操作以产生表示由所述加速度计（110）传感器感测到的加速度的分量的信号，并且电子处理所述信号的至少一部分以产生相对于所述加速度计的用户运动姿态的估计， 并且进一步将所述姿态估计（750，α）与响应于所述设备航向传感器电路的设备航向估计（770，ψ）组​​合以产生用户航向估计（780）; 以及响应于所述电子电路（100）至少部分地基于所述用户标题估计来显示信息的电子显示器（190）。 还公开了其它系统，电路和过程。

    System for Crowd-Sourced Fingerprinting
    37.
    发明申请
    System for Crowd-Sourced Fingerprinting 审中-公开
    人群指纹系统

    公开(公告)号：US20150198721A1

    公开(公告)日：2015-07-16

    申请号：US14667280

    申请日：2015-03-24

    Applicant: Texas Instruments Incorporated

    Inventor： Deric Wayne Waters ,  Jayawardan Janardhanan

    IPC: G01S19/46 ,  G01S5/14 ,  G01S5/02

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

    Abstract: A system for crowd-sourced fingerprinting has a positioning database and a mobile wireless device. The positioning database is configured to store information relating wireless local area network access point (AP) signal measurements to points of a geographic positioning grid. The mobile wireless device has a satellite positioning system, a transceiver, a motion measurement system, and position estimation logic. The position estimation logic is configured to determine a reference location as the device passes between areas of satellite positioning signal reception and satellite positioning signal non-reception. The device further configured to record measurements of movements provided by the motion measurement system and measurements of signals provided by the transceiver within areas of non-reception and to provide results to the positioning database.

    Abstract translation: 用于人群指纹的系统具有定位数据库和移动无线设备。 定位数据库被配置为将关于无线局域网接入点（AP）信号测量的信息存储在地理定位网格的点上。 移动无线设备具有卫星定位系统，收发机，运动测量系统和位置估计逻辑。 位置估计逻辑被配置为当设备在卫星定位信号接收的区域和卫星定位信号不接收之间通过时确定参考位置。 所述设备还被配置为记录由运动测量系统提供的移动的测量结果以及由收发器在不接收的区域内提供的信号的测量值，并向定位数据库提供结果。

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