Passive Tracking and Locating Radar Based on Double GSM Base Stations

Passive radar is a kind of that without its own transmitter and receive the thermal emission energy of an object or its source of microwave energy reflected from the radar to detect targets. The widely distributed GSM base station signals have GMSK frequency modulation characteristics, these signals can be used as a passive radar radiation source for its ambiguity function diagram with axes at a distance and no ambiguity in Doppler shift and the high side-lobe and so on. Multi-base stations passive radar positioning system is one of the important research area. According to the urban low-altitude air defense warning system development, this paper do some researches on line and plane intersection algorithm for passive location and tracking, based on dual-GSM base stations. Meanwhile, probe into the passive tracking technics by utilizing the State-Dependent Riccati Equation Filter tracking algorithm under the dual GSM base stations. Experiments shows that the algorithms have better positioning accuracy, high efficiency and practical value.