Research On Information Fusion Techniques Of Distributed Passive Location System

Information fusion techniques of passive location system play an important role in the military stage. It has gained intensive attention over past decades. How to combine information from multiple sensor and other associated sources to obtain better resulting estimation than any of these sources that used individually is the aim of information fusion also is theme of the thesis. In this dissertation, the main work is as follows:1. A noval alterable logic track initiation algorithm is present which can adjust the regulation of initiation. This method use the adaptive association threshold instead of the constant ones used by the common algorithm according to the condition based on the reality that appearance probability of straight line track is larger than curve ones. Both of mathematic analysis and Simulation results verify that from a viewpoint of the track Initiation probability the new method is superior to the common algorithm. It can enhance the track detection probability with large angle velocity and restrain of number of transition tracks at the same time.2.For convenience of using track correlation algorithms in engineering implement and applications, a noval Two-dimensional of space-time Track Association is presented. To deal with the High Algorithm complexity of the SINGER and BAR-SHALOM approaches and so on. Based on the association of space, the association of time is also included in the new algorithms in this paper, simulation result indicate this algorithm has more advantages.3.A distributed localization algorithms based on multi-platform, which use of Extended Kalman filter (EKF) fusion estimation are presented. This system combines several passive observation stations that can locate target by itself used DOA-DD information to a union. A packet layout method for destroy resistance presented are also given used this system. Simulation results show that this system can maintain good track performance when one or more sensor was been destroyed. 4.In addition, based on the common algorithms of information fusion, a simulation system wrote by C++ is completed. All algorithms of this domain can inset itself to the system if it is completed under the regular of the system. This system can economize time of research, and give an intuitionist exhibit for this domain.