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Method of improving positioning resolving accuracy

A positioning solution and precision technology, which is applied in the field of positioning solution in satellite receivers, can solve the problems of time-consuming and energy-consuming model building, difficulty in finding models, etc., and achieve the effect of improving the accuracy of positioning solution and improving the positioning effect.

Pending Publication Date: 2020-01-21
北京星地连信息科技有限公司
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Problems solved by technology

Choosing a suitable dynamic model can certainly solve the problem well, but in practice, it may be difficult to find a suitable model, and it takes time and effort to build a model for each dynamic scene

Method used

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  • Method of improving positioning resolving accuracy
  • Method of improving positioning resolving accuracy

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Embodiment Construction

[0031] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

[0032] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used in the description of the present invention in this specification are o...

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Abstract

The invention provides a method of improving positioning resolving accuracy. A scene file is run by an analog source, analog navigation signals are received by a receiver through an antenna, parameters such as a pseudo-range and Doppler are obtained through capturing and tracking, the least square solution is carried out to obtain an initial positioning result, and then Kalman filtering is initialized and started for the positioning resolving. By adoption of the scheme, an iteration idea is introduced to the original Kalman filtering in the method of improving the positioning resolving accuracy of the Kalman filtering, so the measuring and updating process is carried out twice; and as prediction data with fractional errors corrected are utilized in the second measuring and updating process, a result obtained finally is more accurate, and the method is more beneficial to improvement of the positioning effect in a highly dynamic environment.

Description

technical field [0001] The invention relates to the technical field of positioning calculation in satellite receivers, in particular to a method for improving the accuracy of positioning calculation. Background technique [0002] In the Global Positioning Satellite System (GNSS), the least square method is usually used to calculate the position and velocity, but the receiver has limited ability to track satellite signals, and most of the random errors that are difficult to eliminate may exist in the measurement information of positioning parameters. Kalman filtering can make full use of the user's motion characteristics and the statistical characteristics of the observations provided by the receiver to optimally estimate the system state quantities to meet the positioning accuracy requirements in high dynamic environments. In the measurement process of the Kalman filter, the system state quantity calculated by the prediction process is used, and the uncertainty of the predic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/37G01S19/29
CPCG01S19/37G01S19/29
Inventor 谭敏强关威裴晶刘思琦
Owner 北京星地连信息科技有限公司
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