Patent ID: 7545311

Claim:
A method for predicting a trajectory of an air-to-surface target missile, the method comprising the following steps: (a) detecting a plurality of echo wave signals from the target missile through a plurality of sensors deployed at various locations relative to the target missile; (b) extracting at least one range distance and at least one radial velocity, respectively, from the detected echo wave signals from the sensors by using a hybrid FSK/LFM unit; (c) using a filter to filter the range distance and the radial velocity computed by the hybrid FSK/LFM unit to estimate a relative distance, a relative velocity, and a relative acceleration, respectively, of the target missile; and (d) applying trilateration on the relative distance, the relative velocity, and the relative acceleration of the target missile estimated by the filter to obtain a location, a velocity and an acceleration of the target missile along x, y, z directions.