City field intensity reconstruction method based on adaptive hybrid interpolation

Abstract

The invention discloses a city field intensity reconstruction method based on adaptive hybrid interpolation, and relates to the field of city radio wave propagation. Due to the fact that an existing city field intensity reconstruction technology is difficult to meet local and wide-area situations of city field intensity at the same time, the reconstruction effect is poor. According to the technical scheme adopted by the invention, the method comprises the following steps: actually measuring and collecting original data composed of longitude and latitude and field intensity, and gridding a to-be-reconstructed region; calculating the density of sampling points around the check point, and respectively calculating the field intensity of the check point by using an inverse distance weighted interpolation algorithm and a Kriging interpolation algorithm; introducing a density threshold to carry out density diversity on grid points, using a particle swarm algorithm to optimize the density threshold, classifying the grid points greater than the threshold to be dense, using an inverse distance weighting algorithm to calculate the field intensity of the grid points, and classifying the grid points less than the threshold to be sparse, and using a Kriging algorithm to calculate the corresponding field intensity. According to the method, the interpolation method is automatically selected according to the density of the city field intensity measured data, the interpolation reconstruction result effectively shows the local and wide-area situation of the city field intensity, and the interpolation precision is improved.

Description

technical field [0001] The invention belongs to the technical field of urban electric wave propagation, and in particular relates to a method for reconstructing urban market intensity based on self-adaptive hybrid interpolation. Background technique [0002] With the development of society, frequency resources are becoming more and more tense, and urban radio management requirements are getting higher and higher. In order to let frequency users and relevant management departments understand the coverage of stations, it is necessary to reconstruct the distribution of urban radio field strength. The reconstruction The choice of method has a great influence on the accuracy of field strength reconstruction. For micro-cells, methods represented by radio wave theory calculations are generally used, such as the method of combining ray tracing and consistent diffraction theory, which has high accuracy, but the cost of environmental modeling is huge, and it is difficult to achieve wi...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for reconstructing urban market strength based on self-adaptive hybrid interpolation, which solves the problem of poor prediction accuracy of propagation models, difficulty in modeling theoretical algorithms and long calculation time in the prior art, and it is difficult for a single interpolation method to be based on sampling point sparseness. The objective reality with large density differences, reflecting the local and global characteristics of field strength and other issues

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