Research On Motion Single Station Direction Finding And Positioning Technology

Passive location technology is widely used in radio monitoring,seismology,electronic countermeasures,communications and other fields because of its strong anti-interference,long observation range and high security.Passive location technology for crossing angle is one of the earliest passive locating techniques.Among them,the passive location technology for crossing angle based on single moving station refers to the continuous observation of the target radiation source by a single moving observation station,and the coordinate information recorded at each observation point and the obtained orientation information of the target signal source are accumulated enough.After observing the data,the data is used to locate the target radiation source.This paper takes the passive location technology for crossing angle based on single moving station as the theme,and conducts in-depth research on the azimuth measurement method,locating algorithm and the problems existing in the cross-locating of multi-target radiation sources.Mainly complete the following aspects of work:1.Azimuth measurement section.For the traditional radio azimuth measurement method,the principle of amplitude azimuth measurement is simple,and the cost of equipment is low.Therefore,the multi-beam ratio amplitude azimuth measurement method is first studied in this paper,and the error is analyzed,considering the portable measurement,a new azimuth measurement method based on the amplitude value of a single directional antenna is proposed in the paper.The feasibility of the method is verified by experimental tests.2.Locating section.In this paper,a typical two-station cross-location is used as a model to analyze the error of cross-locating.For the multi-point cross-location model formed by the moving single station at multiple position points to the target signal source azimuth measurement,when there is noise and interference,it is proposed to use the least squares algorithm to modify the traditional multi-point localization algorithm.For the path selection problem when the observation station is moving,the path planning strategy with the simple application of the geometric dilution is proposed,and the path planning strategy is adopted according to the practical application and the method is simple.3.Multi-target locating part.When the multi-target radiation source is cross-positioned,false positioning points will be generated.Using the spatial spectrum direction finding technology,the array output signals will be demultiplexed,and finally the target of the false positioning points will be eliminated,and the actual experimental data will be used for verification.