Research On The Propagation Properties Of The 4G Mobile Communication Wireless Signal In The Outdoor And Indoor Conditions

In mobile communication network,the distance between celluar sites is decreasing.And the importance of the indoor coverage of 4G mobile communication network is increasing.However,the traditional propagation model of mobile wireless signal is not very accurate and unsuitable for the case from outdoor to indoor propogation.Theref ore,it is necessary to consider both indoor and outdoor application scene and modify the 4G wireless signal indoor and outdoor transmission model.This paper mainly studies the propagation characteristics of 4G mobile communication wireless signal in indoor and outdoor environment,including the propagation from outdoor to indoor case.The content is divided into three parts:The 4G wireless signal losses caused by the reflection on the building wall surface and transmission inside the building wall have been analyzed and simulated in Chapter 2.The effect of the door or windows of the building on the outdoor and indoor propagation of the 4G wireless signal has also been studied.The indoor and ou tdoor propagation of 4G wireless signal has been modeled simply,and measured through experiment.Based on the designed 4G network indoor a nd outdoor simulation system using Matlab,the system's main program modules and th e key code are given.For verification,the Guangzhou JS and Guangzhou Longgui Town are chosen as experiment scenes.The proposed simulation system can be used to analyze the indoor coverage of the outdoor antenna by the propagation model of the 4G wireless signal indoor and outdoor in this paper,after inputting the information of the building.Finally,by using the proposed 4G wireless signal indoor and outdoor propagation model,more penetrating coverage solutions are an alyzed.Based on the an tenna azimuth,height,selection,and distance,the design principles are put forward to solve the common problem of big transmission loss and incomplete coverage.And a com plete deployment guideline of outdoor antennas to achieve indoor 4G network wide coverage is given.Moreover,a building for field testing is selected,and the test results show that this plan is better.