Application Of Radio Direction Finding Method In New Radio Interference Finding

In recent years,the rapid development of radio technology,the emergence of radio applications,new types of radio interference is also increasingly frequent,which brings great trouble to the application and management of radio spectrum engineering.For example,when the "pseudo base-station" equipment is launched,it not only interferes with the normal mobile communication base station service,making the drop rate rise significantly,but also sends spam messages such as mass advertising,harassing mobile phone users.The "illegal broadcast" equipment transmits high-power broadcasting signals,occupies broadcasting channels and frequency resources,and interferes with normal broadcasting services.The main task of radio management is to detect illegal radio signals,eliminate all kinds of radio interference,and ensure the harmony and order of radio communication.In practice and technical research,we find that there is no effective method to find this kind of new radio interference.Therefore,how to improve the direction finding accuracy of such radio signals and improve the success rate of search is the problem that this paper needs to explore and solve.In the research of the thesis,the methods of radio signal detection and recognition are analyzed,and the differences of spectrum characteristics between digital signal and analog signal are compared.This paper mainly studies the performance characteristics and applicable conditions of the mainstream direction finding system,focusing on the analysis and comparison of the two types of direction finding systems commonly used in radio management in our province.One is the correlation interferometer direction finding system.It is characterized by less computation,fast direction finding processing speed,small polarization error,no restriction on the minimum aperture of the antenna,and can resist wavefront distortion;the other is spatial spectrum estimation direction finding system.It can multi signal simultaneous direction finding and anti multipath interference capability.Under the condition of urban environment or complex surrounding environment,the spatial spectrum estimation direction finding system can distinguish the coherent signal produced by multipath effect and eliminate the influence of multipath on direction finding error.In the direction finding of the new radio signal,we should consider all the factors and choose the appropriate technical system to improve the precision of direction finding.In this paper,the equipment structure of "pseudo base-station" and "illegal broadcast" is analyzed,the signal characteristics are studied,and the direction finding and positioning method is proposed.Combining with the use of Jingdezhen radio monitoring network,this paper explores the application of multi-point positioning in new radio interference detection,which opens up a new way for future radio interference detection.