Radar Target Recognition Based On Waveform Synthesis Technology

Due to the urgent demand of national defense, radar anti-stealth technique has been paid more and more attention. The radar target recognition technique is one of the most important techniques in this area. A target recognition technique based on the poles of targets is studied in this thesis, which is called waveform synthesis technique. Because the poles of the conduct target are independent of the radar polarization of the incident wave and its incident direction, waveform synthesis technique based on poles of radar targets is naturally superior to other target recognition techniques.Two waveform synthesis techniques, extinction pulses (E-pulse) technique and single-mode pulses (S-pulse) technique, are elaborately studied in this thesis. In order to prove the correctness and effectiveness of the technique, examples of a lot of scale models are presented so that readers can deeply understand the waveform synthesis technique. The traditional pulse basis function is the rectangular basis function which has a poor anti-noise ability, so another excellent basis function called Fourier cosine basis function is discussed. At the same time, the average recognition rate of the aircraft scale model in the presence of white Gaussian noise is demonstrated. In addition, the impact of the radar polarization of the incident wave and the direction of incident wave is discussed. Although the poles of the target are independent with them, both of them affect the corresponding residues. There are two improvement approaches. One is to use a complex circular polarized signatures, the other one is to construct the so-called multi-angle E-pulses to improve the average recognition rate of the target.