A precise recognition method of missile warhead and decoy in multi-target scene

A precise recognition method of missile warhead and decoy in multi-target scene is presented in this paper. In multi-target scene, the echoes received by radar are the mixture of backscattered signals from all targets within radar beam. In order to separate backscattered signal of each target by Independent Components Analysis (ICA) method, a radar system of multiple antennas with different patterns is designed in this paper. Having a high precision of separation, the complex ICA method is used to decompose independent signals from the linearly mixed echoes received by antennas, instead of using real 2D-ICA to decompose independent Time Frequency (TF) images from TF images of these mixed echoes. The dynamic feature of each target can then be identified by extracting and analyzing the Doppler tracks of decomposed backscattered signals. To obtain high accurate simulation results, the backscattered signals are simulated by electromagnetic full-wave numerical method. The simulation and post processing results agree well with the analytical solution.