Algorithms Of Target Locating And Tracking On Ionosphere-reflection Passive System

For the increasing use of modern electronic technology in military applications, dozens of methods to detect enemy target information and to protect allied information are available now. Modern wars now become into"Information War"or"Electrical War". The most important aspect of modern wars is how to locate and track enemy's objects in electrical ways.Traditional locating and tracking systems are always with emission device equipped. If the directed magnetic wave meets an object, system can locate the target according to the scattering echo. Because of the development of electronic science and technology, traditional ways is threatened by electrical interfere, anti-radiation missile, ultra-low height assault and undetectable weapons. People began to find new ways to improve traditional method's defects. As a new method, the passive locating and tracking became more and more popular because of its self-emission free specialty, civil magnetic wave (radio, television, cell phone, GPS, etc) becomes the radiation source of this system.This paper is based on the development of passive locating and tracking systems, analyzes several popular passive systems with their basic theory, achieve process, good qualities and flaws. Then, we give a whole new method for passive location and tracking in use of ionosphere reflection, build the mathematical model and the processing formula. The final part of this paper is the simulation result and analysis.In simulation approach, we set different movement models to test the formula's availability and efficiency. According to the simulation results, targets can be well located and tracked by this method proposed in stable velocity state and slow-changing velocity state.