An Indoor Pseudo-Lite 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 indoor positioning and pseudolite navigation, can solve the problems of poor positioning performance and achieve the effect of improving positioning accuracy

Active Publication Date: 2020-06-30
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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  • An Indoor Pseudo-Lite 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 pseudolite positioning method based on carrier phase difference matching, and relates to the field of pseudolite indoor positioning. This method first establishes the indoor fingerprint library of pseudolite carrier phase difference, compares the pseudolite phase difference collected by various indoor terminals with the fingerprint library, and finds the maximum value of the correlation peak. The coordinates corresponding to the maximum value are the current coordinates of the terminal to realize indoor High-precision navigation and positioning. The present invention can achieve relatively less difficulty, and eliminate the influence of multipath effect on indoor positioning, and can effectively improve the accuracy of indoor navigation and positioning.

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...

Claims

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Application Information

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Patent Type & Authority Patents(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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