Research On TD-LTE Network Interference Detection Method

TD-LTE is one of the world's leading 4G standards which is dominated by China.The formation of this standard has received the participation and support of the global mainstream network operators,system equipment vendors,terminal manufacturers and chip manufacturers.Compared with the third generation wireless communication standards,whether the system architecture or transmission technology has got significant innovation.With the rapid deployment and development of TD-LTE network in China,the number of domestic TD-LTE base stations is increasing and the wireless environment is becoming more and more complex.Meanwhile,all kinds of interference problems restrict the performance of LTE network to a great extent,and seriously affect the use of users.Therefore,it is important to improve that quality of wireless network by quickly discovering,locate and solving interference problems.The problem of interference is widespread and varied in real environment.Deep analysis and research on each kind of interference from generating principle to affected characteristics will be helpful to investigate and locate the interference.In terms of the source of interference,it can be divided into intra-system interference and external system interference.According to the interference problems in the real environment,combined with the system characteristics,coverage mode and basic principle of TD-LTE network,this thesis elaborates on the causes of various interference,and summarizes the influence characteristics of each kind of interference.Secondly,this thesis proposes the idea of taking the possible interference in different frequency bands and its characteristics as the entry point,and analyzes and studies the possible interference in different frequency bands from the dimensions of time domain,frequency domain and spatial domain.At the same time,this thesis starts with the difficulty of interference detection,combines with the characteristics of interference,to determine the steps of interference detection,puts forward a set of systematic interference detection method,so as to be able to quickly and accurately identify the types and causes of positioning interference,and give the corresponding solutions.Finally,this thesis verifies the effectiveness of the interference detection method with specific cases in practical work,providing reference and guidance for solving similar problems in the later positioning and detection.