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GPS-based relative positioning enhancement method using neighboring entity information

一种相对位置、GPS数据的技术，应用在GPS辅助定位领域，能够解决相对定位不精确等问题，达到小化GPS定位误差、小化GPS数据误差的效果

Active Publication Date: 2012-05-09
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Determining the relative positioning between two vehicles based on their respective GPS positions and measurements will also be imprecise if the two vehicles have obstacles where the required number of shared satellites are not available

Method used

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  • GPS-based relative positioning enhancement method using neighboring entity information
  • GPS-based relative positioning enhancement method using neighboring entity information
  • GPS-based relative positioning enhancement method using neighboring entity information

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] figure 1 A block diagram of a vehicle positioning system 10 for a host vehicle is shown. The vehicle positioning system 10 includes an onboard Global Navigation Satellite System (GNSS) 12 receiver or other Global Positioning System (GPS) receiver. It should be understood that the terms GNSS and GPS are used herein interchangeably. The GNSS system includes a constellation of global positioning satellites comprising at least 24 or more satellites orbiting the earth along predetermined paths of operation that continuously transmit data signals with time stamps. GNSS receivers operate by tracking line-of-sight signals. These receivers typically require continuous acquisition of at least four or more satellites in an unobstructed line of sight to the satellite receiver on the vehicle. A GNSS receiver receives the transmitted data and uses this information to determine its absolute position. Observing the earth on a two-dimensional plane, each point on the earth is identi...

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PUM

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Abstract

The invention relates to a GPS-based relative positioning enhancement method using neighboring entity information, in particular, a method and system is provided for determining a relative position between a host vehicle and a remote vehicle using an indirect assisting entity technique. A GPS position of the host vehicle and a remote vehicle are obtained. A number of common satellites providing GPS data to the host vehicle and the remote vehicle are determined. An indirect-assisting entity is identified having a common number of satellites in communication between the host vehicle and remote vehicle, respectively, which is greater than the number of common satellites between host vehicle and the remote vehicle. A relative position is determined between the host vehicle and the indirect-assisting entity, and the remote vehicle and the indirect-assisting entity. A position of the host vehicle relative to the remote vehicle is determined as a function of the determined position of the host vehicle and remote vehicle relative to the indirect-assisting entity.

Description

technical field [0001] Embodiments generally relate to GPS assisted positioning. Background technique [0002] Global Positioning System (GPS) or other Global Navigation Satellite System (GNSS) receivers operate by tracking line-of-sight signals. These receivers typically require continuous acquisition of at least four or more satellites in an unobstructed line of sight to the satellite receiver on the vehicle. Due to natural and man-made obstructions (eg, buildings) or natural obstructions (ie, dense tree cover), in some cases the optimal number of satellites required to accurately determine the position of a satellite receiver may not be available. Other errors, such as satellite orbit errors, poor geometry, atmospheric delays, multipath signals, or clock errors may require more than the minimum number of satellites required to accurately determine the receiver's position. Determining a relative position between two vehicles based on their respective GPS positions and me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/51
CPCG01C21/28G01S19/03G01S19/51
Inventor C. 巴斯纳亚克
Owner GM GLOBAL TECH OPERATIONS LLC