高频地波舰载OTH双基地雷达目标回波特性分析
doi: 10.3724/SP.J.1146.2007.00063
Target Echo Characteristics Analysis of HF Groudwave Shipborne OTH Bistatic Radar
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摘要: 在高频地波舰载OTH双基地雷达中，雷达平台的运动必然增加整个系统的复杂性。该文分析了移动双基地系统的动态几何关系，以及动态几何关系的变化对LFMICW信号的目标回波产生的影响。重点对目标回波的中频相位与雷达平台运动特性之间的关系进行了详细分析，简要地讨论了在这种复杂动态系统中目标距离和速度信息的提取方法。最后通过仿真验证了近距离目标的多普勒谱线的展宽。Abstract: In HF groundwave shipborne bistatic radar, the movement of radar can make the system more complex. This paper analyses the geometrical change of the mobile bistatic system, and the effect of the geometrical change to the LFMICW signal echo of target,and anylyses the relationship between phase of the intermediate frequency signal of target echo and the movement of radar in detail, and simply discusses the method to get the range and velocity of target in the complex dynamic system. Finally, the result of simulation proves the broadening of target doppler frequency when the target is near to the radar.
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