Method for measuring, calculating and evaluating signal covering quality of digital single frequency network

Abstract

The invention provides a method for measuring, calculating and evaluating the signal covering quality of a digital single frequency network. The method comprises the following steps: A, generating a grid network image layer in a geographical area within a calculation range according to calculation range and calculation accuracy information included in a message sent by a field intensity measuring, calculating and analyzing module, and calling geographic information of each grid central point in a grid network from a geographic information database; B, after acquiring information data of each station of the single frequency network needing calculating and the geographic information of each grid central point, calculating a field intensity value from the single frequency network station andeach grid; C, sampling and simulating the field intensity value of each grid point and performing synthetic analysis on each field intensity value of each grid point to obtain covering probability ofthe grid point; and D, calculating a color value of the grid point according to a covering probability value of each grid point, coloring each grid point in the grid network and covering the colored grid point on an electronic map for outputting and displaying. Signal prediction correctness and accuracy rate of the single frequency network can be enhanced.

Description

technical field [0001] The invention relates to a radio and television wireless coverage signal quality prediction technology, in particular to a digital single frequency network signal coverage quality measurement and evaluation method. Background technique [0002] The measurement and calculation of terrestrial radio and television signal quality involves multiple technical fields such as radio wave propagation, mathematical models, probability statistics, and television principles. , and finally a complex process of comprehensive analysis according to the relevant standards of radio and television. Digital TV SFN is a kind of terrestrial digital TV. It is widely used in various countries and regions because of its high spectrum utilization rate, uniform signal coverage, and suitable for mobile reception. The prediction method of digital TV single frequency network signal is similar and different from the previous prediction method of analog TV signal. It is necessary to ...

AI Technical Summary

Problems solved by technology

This type of system supports three terrestrial digital TV standards (DVB-T, ATSC and ISDB-T) adopted by the International Telecommunication Union, and supports ITU-R P.370, ITU-RP.1546, ITU-R P.526 and other models , support power sum method, simplified multiplication method, K factor method and other synthesis methods, the interface is fixed, the price is expensive, and there are many inconveniences in use

Moreover, foreign prediction systems do not fully take into account the characteristics of digital TV SFN signals, which affects the correctness and accuracy of SFN signal predictions to a certain extent.

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