Building and calibrating method for construction material wireless propagation loss parameter database

Abstract

The invention relates to a building and calibrating method for a construction material wireless propagation loss parameter database, which includes the following steps: firstly, building a construction material wireless propagation loss parameter database; secondly, building a three-dimensional space model for a target building; thirdly, selecting a plurality of testing points inside the building, and measuring wireless signal intensity information of the obtained testing points on site; fourthly, in virtue of the structure of the building and the information of the construction material wireless propagation loss parameter database, based on an indoor distributing system model inside the building, and through the utilization of an improved ray tracing propagation model, predicating the wireless signal intensity information of the testing points; fifthly, adjusting the construction material wireless propagation loss parameter database through the simulated annealing algorithm to obtain the minimum error of mean square of the predictive value and the measured value, so as to obtain the more accurate and perfect construction material wireless propagation loss parameter database.

Description

technical field [0001] The invention relates to a method for establishing and correcting a wireless propagation loss parameter database of building materials, and belongs to the technical field of electric wave propagation prediction in the communication field. Background technique [0002] In the field of wireless network planning and design, it is usually necessary to use a wireless propagation model to predict the propagation and loss of wireless signals. The accurate prediction of wireless propagation loss can provide a good basis for selecting the location of the base station, antenna transmission power and frequency. Through the prediction of propagation loss, One can effectively determine the signal field strength, signal-to-noise ratio, carrier-to-interference ratio, etc. [0003] A radio propagation model is a set of mathematical expressions, diagrams or algorithms used to represent the radio propagation characteristics in a given environment. Generally speaking, t...

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Problems solved by technology

[0004] Since the accuracy of the material loss database directly affects the prediction accuracy of the wireless propagation model, it is necessary to establish a building material loss parameter database for empirical and semi-empirical propagation models, but it is usually impossible to accurately determine the accuracy of each type of indoor building in reality. Material attribute parameters: reflection, diffraction and transmission loss parameters, so it is necessary to adjust the building material loss parameter database according to the field measurement data in a timely manner, and then continuously improve the building material loss parameter database

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