Design of target data fusion algorithm for passive radar based-on dual GSM base stations

The ambiguity of GSM signals transmitted by GSM base stations has a pushpin-type and low side lobe, and it's no ambiguity at distance and Doppler-axis. It's very suitable as a illuminator source of passive radar. This paper presented a mathematical model of passive radar using two GSM base stations as the illumination source, simulated with extended Kalman filter algorithm and verified the feasibility and effectiveness of the algorithm. The results shows that it can effectively overcome the defects such as low tracking accuracy and long time of target dynamic process when adopting single GSM base station to building passive radar. This system can be used as supplementary to urban low-altitude defense system so as to effectively respond to low-altitude invading enemy weapons.