基于相位变化率的体目标与点源合成目标回波分辨OA北大核心CSTPCD

To address the echo discrimination problem of underwater bulk targets and multipoint-source synthetic targets,the key factors affecting the formation of underwater target echo phase and the difference of the echo phase formation of underwater bulk target and multipoint source synthetic target were characterized and analyzed based on the differences of their formation mechanism.A discrimination method of bulk target echo and multipoint source synthetic echo was proposed and established in this paper based on the characteristic differences of the phase change rates of the two types of signals.The method of discriminating the two types of echo signals was verified through the characteristic simulation of the benchmark submarine reduction model and the multipoint source synthet-ic target model,along with the contrast test on the lake.The results of the simulation and test data analysis show that the bulk target echo can be resolved from the multipoint source synthetic echo by comparing the phase change rate of echo in the same azimuth angle range.Furthermore,the feasibility of the echo discrimination method based on the phase change rate of underwater bulk targets and multipoint source synthetic targets is verified.