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Indoor pseudo-satellite positioning method based on carrier phase difference matching

A technology of carrier phase difference and positioning method, which is applied in the field of pseudolite navigation and pseudolite indoor positioning, which can solve the problems of poor positioning performance and achieve the effect of improving positioning accuracy

Active Publication Date: 2019-04-05
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: the positioning method based on the pseudolite solves the navigation and positioning problem in the indoor complex environment, provides an indoor positioning method based on the carrier phase difference fingerprint library, and improves the navigation and positioning accuracy in the indoor complex environment
The positioning method based on the carrier phase difference fingerprint library proposed by the present invention can well solve the problem of poor positioning performance in the indoor multipath environment of the existing method, and improve the positioning accuracy of indoor navigation

Method used

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  • Indoor pseudo-satellite positioning method based on carrier phase difference matching

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings. Such as figure 1 Shown is a kind of indoor pseudolite positioning method based on carrier phase difference matching disclosed in the embodiment of the present invention, and the specific implementation includes the following steps:

[0019] Step 1. Establish an indoor pseudolite carrier phase difference fingerprint library, with L pseudolites numbered s 1 ,s 2 ,...,s L , then at most L(L-1) / 2 carrier phase differences will be formed, and the indoor space is divided into M×N grids, and a high-precision measurement receiver is used to collect the carrier phase of this point in each grid. And find the carrier phase difference between different pseudolites, take the cosine value of the carrier phase difference, and then establish the indoor pseudolite carrier phase difference fingerprint library T of the size M×N×(L(L-1) / 2) MN , and match the fingerprint library with the...

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Abstract

The invention discloses an indoor pseudo-satellite positioning method based on carrier phase difference matching and relates to the field of pseudo-satellite indoor positioning. According to the indoor pseudo-satellite positioning method, a pseudo-satellite carrier phase difference indoor fingerprint database is built firstly, and indoor high-precision navigation positioning is achieved through the method that pseudo-satellite phase differences collected by all indoor terminals and the fingerprint database are compared, the correlation peak maximum value is sought, and coordinates corresponding to the maximum value are current coordinates of the terminals. The difficulty can be relatively small, the influences of the multipath effect on indoor positioning are eliminated, and the precisionof indoor navigation positioning can be effectively improved.

Description

technical field [0001] The invention relates to the field of pseudolite navigation, in particular to the field of indoor positioning of pseudolites. The indoor positioning technology of adaptive carrier phase difference vector matching is used to realize indoor high-precision navigation and positioning. Background technique [0002] The problem of high-precision positioning in indoor complex environments has always been a technical problem. Due to the influence of multipath and indoor complex environments, traditional indoor positioning methods have one or another problem and cannot achieve high-precision positioning. For example, direct Pseudolites are used for data calculation and positioning. Due to the influence of multipath, the positioning accuracy cannot be guaranteed; WIFI and Bluetooth energy positioning methods are greatly affected by indoor environment changes, and the positioning accuracy cannot be guaranteed. However, using the carrier phase difference between di...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/43
CPCG01S19/43
Inventor 蔚保国范广伟姬文军陈晓阳贾瑞才李枭楠
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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