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VHF signal propagation path error prediction method and system

A signal propagation and error prediction technology, applied in the field of signal propagation, can solve problems such as unusable, costly engineering costs, limited application range, etc., to achieve the effect of reducing ranging error and improving positioning accuracy

Active Publication Date: 2022-07-12
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

However, there are certain limitations in the actual application of this technology. For example, the real-time correction technology is a fixed-point measurement of the propagation path error correction value, which can only be used in sea areas that have a temporal and spatial correlation with the measurement point. The application range is limited and cannot be used in areas without Real-time correction of the sea area covered by the signal, and the realization of real-time correction technology still requires engineering costs

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  • VHF signal propagation path error prediction method and system
  • VHF signal propagation path error prediction method and system
  • VHF signal propagation path error prediction method and system

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Embodiment Construction

[0036] In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appropriate ...

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Abstract

The invention provides a VHF signal propagation path error prediction method and system. The method comprises the following steps: acquiring a related data set for neural network training; extracting a first sample set from the related data set to train the BP neural network; optimizing a network weight and a threshold value of the BP neural network based on a PSO algorithm of a chaos strategy to obtain an optimal BP neural network; inputting the first sample set into SDAE for reconstruction and then training LSTM; and combining the trained BP neural network and the trained LSTM neural network as base models to construct a meta-model, carrying out integrated learning on the meta-model, and predicting a VHF signal propagation path error based on the trained meta-model. According to the method, the VHF signal propagation path error can be effectively predicted in a complex sea surface environment, and an experimental basis is provided for improving the positioning precision of a land-based navigation system.

Description

technical field [0001] The present invention relates to the technical field of signal propagation, in particular, to a method and system for predicting a propagation path error of a VHF signal. Background technique [0002] GNSS (Global Navigation Satellite System, Global Navigation Satellite System) has a natural vulnerability. Once GNSS fails, shipboard equipment cannot obtain positioning information correctly, which is bound to seriously threaten the safety of navigation. Therefore, a ground-based navigation system independent of the space-based navigation satellite system should be studied. The positioning error of the ground-based navigation system mainly comes from three aspects: the reference station transmitting system, the signal propagation path and the receiving system. [0003] AIS (Automatic Identification System, Ship Automatic Identification System) is a land-based navigation system mandatory for ships to be equipped by the SOLAS Convention of IMO. The AIS si...

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Application Information

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IPC IPC(8): G06Q10/04G06N3/04G06N3/08
CPCG06Q10/04G06N3/084G06N3/044G06N3/045Y02A90/10
Inventor 王晓烨胡青张晶泊孙晓文怀率恒姜毅
Owner DALIAN MARITIME UNIVERSITY