Atmospheric waveguide parameter estimation method based on DNN

Abstract

The invention discloses an atmospheric waveguide parameter estimation method based on DNN, and the method comprises the steps: extracting the attenuation features of a signal in an atmospheric waveguide through a DNN network, converting a parameter estimation problem into a DNN network feature extraction problem, and finding out the mapping relation between radio wave signal attenuation and atmospheric waveguide parameters at different distances; establishing a propagation model of the X-band signal in the atmospheric waveguide, taking power sampling points at different distances as input, andperforming atmospheric waveguide parameter estimation through a radio wave signal of a sparse frequency point so as to achieve atmospheric waveguide parameter estimation of continuous frequency. According to the method, the defects of low precision and long consumed time of numerical calculation can be overcome, an accurate prediction result can be obtained at a relatively long distance, and furthermore, a continuous frequency estimation result can be obtained by utilizing sparse point frequency training.

Description

technical field [0001] The invention relates to a method for estimating parameters of an air waveguide, in particular to a method for estimating parameters of an air waveguide based on a DNN, and belongs to the field of signal processing. Background technique [0002] Atmospheric ducting is a typical event in the near-Earth atmospheric environment. They represent abnormal states of the atmosphere. Waveguides trap electromagnetic waves in a specific atmosphere and transmit them over beyond-horizon distances with low propagation loss, which greatly enhances the distance that radio waves can travel. It will also cause long-distance co-channel interference in the TD-LTE network system, which will seriously affect the city's communication system. [0003] Atmospheric duct forecast information can also be obtained based on numerical weather forecasting technology, which is still in its infancy due to the constraints of the development of numerical weather forecasting technology....

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Problems solved by technology

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a method for estimating atmospheric duct parameters based on DNN, which solves the problems of difficult operation and complicated process of traditional mathematical models for atmospheric duct parameter estimation.

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