Method for subsequently processing original positioning result of global positioning system

A global positioning system and positioning result technology, applied in the field of subsequent processing of the original positioning results of the global positioning system based on mode selection, can solve problems such as limited applications, and achieve the effects of ensuring real-time performance, improving output positioning effects, and reducing errors

Inactive Publication Date: 2010-08-25
中科集成资产管理(北京)有限责任公司
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Problems solved by technology

For receivers moving at high speed, this problem i

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  • Method for subsequently processing original positioning result of global positioning system
  • Method for subsequently processing original positioning result of global positioning system
  • Method for subsequently processing original positioning result of global positioning system

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In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to specific embodiments and drawings.

Figure 1 depicts a schematic diagram of a typical GPS receiver for positioning. Knowing the positions of the four satellites and the time when the signals transmitted by these four satellites arrive at the receiver, the receiver position and the error value of the receiver time relative to the satellite time can be calculated. It should be understood that due to the combined effect of various errors, the original positioning results obtained by the receiver have certain systematic errors. These errors include measurement error of receiver tracking loop, truncation effect error, receiver internal delay error, satellite clock error, ephemeris prediction error, relativistic effect, ionospheric effect, tropospheric effect, receiver noise and multipath effect. Due t...

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Abstract

The invention discloses a method for subsequently processing an original positioning result of a global positioning system. A receiver resolves a self original positioning result, writes the original positioning result in a data buffer, and acquires self speed, speed direction angle and acceleration; the receiver judges whether the original positioning result is an abnormal value or not according to the relative displacement between positioning points as well as the speed and the acceleration of the receiver, if the original positioning result is an abnormal value, then the abnormal value is restored, and if the original positioning result is a normal value, then the original positioning result is kept unchanged; the receiver judges the self movement mode according to the speed and the speed direction angle, and if the receiver is in a low-speed movement mode, then the original positioning result is smoothened; if the original positioning result is in a straight line movement mode, then a straight line of the original positioning result is fitted; and if the receiver is in a curve movement mode, then a curve of the original positioning result is fitted. The invention can obviously increase the positioning accuracy, reduce errors and improve the user experience.

Description

technical field The present invention relates to the technical field of receivers based on a global positioning system (such as a GPS system), in particular to a method for subsequent processing of an original positioning result of a global positioning system based on mode selection. Background technique Global satellite positioning and navigation systems, such as the Global Positioning System (GPS), include a constellation of satellites (also known as Navstar satellites) that transmit GPS signals that can be used by a receiver to determine the receiver's location. Satellite orbits are arranged in multiple planes so that the signal can be received from at least four satellites at any location on Earth. More typically, the signal is received from more than six satellites in most places on Earth. The GPS signal transmitted by each GPS satellite is a direct sequence spread frequency signal. The commercially used signal is related to the Standard Positioning Service (SPS) and...

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Application Information

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IPC IPC(8): G01S1/02
Inventor 陈陌寒郑睿陈杰
Owner 中科集成资产管理(北京)有限责任公司
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