Research On LTE Coverage Enhancement Technology In Mountainous And Hilly Environment With Complex Vegetation

Since the fourth-generation mobile communications technology has been fully rolled out in China,the continuous coverage of the three major operators in the cities and hotspot coverage in rural areas have made LTE(Long Term Evolution)a platform for carrying live and work.On top of that,numerous technological trends such as big data,mobile payments,and online videos all have "blossomed results",profoundly changing our original lifestyle.Compared to the mature planning networking in the commercial field of LTE,it is a challenging task to carry out LTE network planning in a specific category of LTE network planning,especially on hilly hills with dense and complex vegetation.The blocking of signal propagation and the large-scale fading and small-scale fading caused by this signal increase the difficulty of signal coverage.In addition,problems such as signal reflection,diffraction and scattering caused by dense vegetation make the coverage of LTE networks greatly reduced,seriously affecting the mountains.Regional communication quality.This thesis combines the actual construction of the project,to enhance the coverage of LTE complex vegetation mountainous hilly environment as the main research content,starting from the key technologies of LTE,coverage planning general processes and influencing factors,introduces the current LTE more common coverage enhancement methods.On this basis,in conjunction with specific needs,the establishment of a dedicated LTE network has been proposed to solve the difficulty of underground coverage and weak coverage in dense vegetation hills.In order to effectively deal with the vegetation fading of radio waves,this thesis studied the vegetation fading model in detail,and through Matlab simulation,pointed out that the 600 MHz band has less power loss than the public network band,and based on the 600 MHz band,it is used in base station equipment and terminal equipment.The advanced peak clipping technology and predistortion technology further enhance the coverage.At the same time,while the fixed network is planned for the private network,the vehicle-mounted base station with SON function is built to compensate for blindness and the network coverage effect is continuously enhanced.Finally,select a certain area in the Dabie Mountains as an object,use the above results to link budget,reasonably select the location of the base station for site planning and network coverage simulation,and verify that the construction of the low frequency private network meets the use environment of mountains,deep trenches and dense forests.Combined with engineering practice,it is shown that the above methods basically achieve the expected results of the design and achieve the goal of planning coverage.It has a certain reference role for LTE network planning networking under specific conditions.