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Self-adapting data window size smoothing method for positioning result of global positioning system

A technology of global positioning system and positioning results, which can be used in positioning, radio wave measurement systems, instruments, etc., and can solve problems such as limiting navigation applications.

Active Publication Date: 2009-05-13
中微智创(北京)软件技术有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

For receivers moving at high speed, this problem is especially obvious, which limits many navigation applications

Method used

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  • Self-adapting data window size smoothing method for positioning result of global positioning system
  • Self-adapting data window size smoothing method for positioning result of global positioning system
  • Self-adapting data window size smoothing method for positioning result of global positioning system

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0021] figure 1 A schematic diagram depicting a typical GPS receiver to achieve positioning. Knowing the positions of the four satellites and the time when the signals transmitted by the four satellites arrive at the receiver, the error value of the position of the receiver and the time of the receiver relative to the time of the satellite on-board clock can be calculated. It should be understood that due to the comprehensive effect of various system errors, there are certain relative errors in the original positioning results obtained by the receiver. These errors include satellite clock errors, ephemeris prediction errors, relativistic effects, ionospheric effects, tropospheric effects, receiver noise and multipath eff...

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Abstract

The invention discloses a smoothing method of self-adaptive data window length used for a GPS positioning result, and relates to the global satellite positioning and navigation field, such as a GPS. The method comprises the following steps: self-adaptively determining the smoothly sliding window length by a measured receiver speed, and smoothing by a corresponding smoothing method. The self-adaptive data window length smoothing method of the positioning result is applicable to the internal of baseband processing chips of any types of GPS receivers, as well as a receiver system with the GPS baseband processing chip as a core. The method can obviously enhance the positioning precision, reduce errors, and obviously reduce positioning result delay, and ensure real-time property of the positioning result. Compared with other methods, the method is simpler and more easily used, thus greatly reducing complexity and facilitating combination with other smoothing methods.

Description

technical field [0001] The invention relates to the field of global satellite positioning and navigation systems, in particular to the field of adaptively determining the window length of selected data for the positioning results of the global positioning system, and further realizing the smoothing method of the positioning results. Background technique [0002] Global satellite positioning and navigation systems, such as the United States' Global Positioning System (GPS), consist of 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. [0003] The GPS signal transmitted by each GPS satellite is a direct sequence spread frequency signal. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02G01S5/14
Inventor 郑睿陈杰李健
Owner 中微智创(北京)软件技术有限公司
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