公开(公告)号：WO2017001207A1

公开(公告)日：2017-01-05

申请号：PCT/EP2016/063964

申请日：2016-06-16

Applicant: QUALCOMM TECHNOLOGIES INTERNATIONAL, LTD.

Inventor： GARG, Vivek ,  RAMAMURTHY, Madhukar

IPC: G01S19/42

CPC classification number: G01S19/42 ,  G01S19/24

Abstract: The system provides a global navigation satellite system (GNSS) receiver in a vehicle including a radio frequency (RF) receiving circuit for receiving GNSS signals from a plurality of GNSS satellites orbiting Earth at different elevations, and a processor. The processor is configured to calculate a first signal to noise ratio (SNR) for a first GNSS satellite, calculate a second SNR for a second GNSS satellite, monitor a relative change in the first SNR with respect to the second SNR over time, determine that the GNSS receiver has entered a parking garage based on the relative change in the first SNR with respect to the second SNR, in response to this determination, restrict a positioning algorithm to estimate the position of the vehicle upon the vehicle exiting the parking garage to be within a specified range of a known position of an entrance of the parking garage, and execute the restricted positioning algorithm to estimate a position of the GNSS receiver based on the received GNSS signals.

Abstract translation: 该系统在车辆中提供全球导航卫星系统（GNSS）接收机，其包括用于从在不同高度绕地球轨道运行的多个GNSS卫星接收GNSS信号的射频（RF）接收电路和处理器。 处理器被配置为计算第一GNSS卫星的第一信噪比（SNR），计算第二GNSS卫星的第二SNR，监测第一SNR相对于第二SNR随时间的相对变化，确定 GNSS接收机基于第一SNR相对于第二SNR的相对变化进入停车库，响应于该确定，限制定位算法以估计车辆离开停车库的车辆的位置为 在停车库的入口的已知位置的指定范围内，并且执行受限定位算法以基于接收到的GNSS信号来估计GNSS接收机的位置。

公开(公告)号：WO2017029042A1

公开(公告)日：2017-02-23

申请号：PCT/EP2016/067073

申请日：2016-07-18

Applicant: QUALCOMM TECHNOLOGIES INTERNATIONAL, LTD

Inventor： RAMAMURTHY, Madhukar

IPC: G01S19/22 ,  G01S19/36 ,  G01S19/42 ,  G01S19/53 ,  G01R29/10

CPC classification number: G01S19/23 ,  G01R29/10 ,  G01S19/22 ,  G01S19/24 ,  G01S19/36 ,  G01S19/42 ,  G01S19/53

Abstract: The system provides a global navigation satellite system (GNSS) receiver in a vehicle. The GNSS receiver includes a radio frequency (RF) receiving circuit configured to receive GNSS signals from a plurality of GNSS satellites orbiting Earth at respective azimuth and elevation angles, a memory device storing a predetermined antenna pattern including initial signal to noise ratio (SNR) values for each of the respective azimuth and elevation angles, and a processor. The processor is configured to calculate SNR values of the received GNSS signals, iteratively calculate an updated antenna pattern by combining the calculated SNR values with the initial SNR values, compare further SNR values of further received GNSS signals to the SNR values in the updated antenna pattern to perform at least one of the following: 1) detection and mitigation of multipath signals, 2) estimation of vehicle heading, and 3) determination of a location of the antenna within the vehicle.

Abstract translation: 该系统在车辆中提供全球导航卫星系统（GNSS）接收机。 GNSS接收机包括射频（RF）接收电路，其被配置为以相应的方位角和仰角从轨道绕地球的多个GNSS卫星接收GNSS信号;存储装置，其存储包括初始信噪比（SNR）值的预定天线方向图 对于各个方位和仰角中的每一个以及处理器。 处理器被配置为计算所接收的GNSS信号的SNR值，通过将计算的SNR值与初始SNR值组合来迭代地计算更新的天线方向图，将进一步接收的GNSS信号的SNR值与更新的天线方向图中的SNR值进行比较 执行以下中的至少一个：1）检测和减轻多路径信号，2）车辆航向的估计，以及3）确定车辆内天线的位置。