公开(公告)号：US20230077470A1

公开(公告)日：2023-03-16

申请号：US18057157

申请日：2022-11-18

Applicant: QUALCOMM Incorporated

Inventor： Urs NIESEN ,  Jubin JOSE ,  Lei ZHANG

IPC: G01S19/47 ,  G01S19/49 ,  G01S19/48

Abstract: Techniques provided herein are directed toward virtually extending an updated set of output positions of a mobile device determined by a VIO by combining a current set of VIO output positions with one or more previous sets of VIO output positions in such a way that ensure all outputs positions among the various combined sets of output positions are consistent. The combined sets can be used for accurate position determination of the mobile device. Moreover, the position determination further may be based on GNSS measurements.

公开(公告)号：US20150215821A1

公开(公告)日：2015-07-30

申请号：US14167749

申请日：2014-01-29

Applicant: QUALCOMM Incorporated

Inventor： Lei ZHANG ,  Sundar SUBRAMANIAN ,  Ying WANG ,  Xinzhou WU ,  Carlos ALDANA ,  Xiaoxin ZHANG

IPC: H04W28/18 ,  H04W4/02

CPC classification number: H04W4/029 ,  H04W56/00

Abstract: Implementations of the technology described herein provide adjustment to the time-of-departure (ToD) of the start of the acknowledgement frames (ACK) based on the time-of-arrival (ToA) estimation and correction of their corresponding message frames to keep the turnaround time of the acknowledgement frames stable to a predefined order of precision, with special applications for Wi-Fi ranging to achieve double-sided time-of-arrival (ToA) correction accuracy with minimal frame exchanges. A receiving station uses its time-of-arrival (ToA) correction to adjust the transmission time of an acknowledgement message (ACK) so that both the sending station and the receiving station can estimate round trip time (RTT) (or perform ranging) at the same level or higher accuracy.

Abstract translation: 本文描述的技术的实现基于到达时间（ToA）估计和相应消息帧的校正来提供对确认帧（ACK）的开始的出发时间（ToD）的调整，以保持 确认帧的周转时间以预定义的精度顺序稳定，Wi-Fi的特殊应用范围可以通过最少的帧交换实现双面到达时间（ToA）校正精度。 接收站使用其到达时间（ToA）校正来调整确认消息（ACK）的发送时间，使得发送站和接收站都可以估计出来的时间（RTT）（或执行测距）在 相同水平或更高的精度。

公开(公告)号：US20150066422A1

公开(公告)日：2015-03-05

申请号：US14476482

申请日：2014-09-03

Applicant: QUALCOMM Incorporated

Inventor： Lei ZHANG ,  Sichao YANG ,  Shankar SADASIVAM ,  Sundar SUBRAMANIAN ,  Xinzhou WU

IPC: A61B5/11 ,  G01P15/00 ,  G01P13/00

CPC classification number: A61B5/1123 ,  A61B5/1118 ,  A61B5/1126 ,  G01C22/006 ,  G01P13/00 ,  G01P15/00

Abstract: Disclosed is an apparatus and method for classifying a motion state of a mobile device. In one embodiment, accelerometer data representing acceleration components along orthogonal x, y, and z axes of the mobile device are collected. A presence or absence of a half-step frequency relationship between the accelerometer data is determined. Last, the motion state of the device is determined based at least in part on the presence or absence of the half-step frequency relationship.

Abstract translation: 公开了一种用于对移动设备的运动状态进行分类的装置和方法。 在一个实施例中，收集表示沿着移动设备的正交x，y和z轴的加速度分量的加速度计数据。 确定加速度计数据之间是否存在半步频率关系。 最后，至少部分地基于半步频率关系的存在或不存在来确定设备的运动状态。

公开(公告)号：US20210072409A1

公开(公告)日：2021-03-11

申请号：US17083516

申请日：2020-10-29

Applicant: QUALCOMM Incorporated

Inventor： Urs NIESEN ,  Jubin JOSE ,  Lei ZHANG

IPC: G01S19/47 ,  G01S19/48 ,  G01C22/00

Abstract: Techniques provided herein are directed toward virtually extending an updated set of output positions of a mobile device determined by a VIO by combining a current set of VIO output positions with one or more previous sets of VIO output positions in such a way that ensure all outputs positions among the various combined sets of output positions are consistent. The combined sets can be used for accurate position determination of the mobile device. Moreover, the position determination further may be based on GNSS measurements.