靶标雷达特性快速预测与分析

含多次散射复杂靶标雷达特性的快速预估和分析是靶标设计优化的重要基础，同时也是电磁散射建模领域的重要研究课题之一。多次散射结构及其复杂散射机理导致靶标雷达特性仿真效率低下、特性分析困难。本文提出了一种CPU多核并行技术、GPU硬件加速技术和KD?Tree遍历技术相结合的靶标高频电磁散射加速方法，建立了带腔舰船、角反射器阵列与舰船等含多次散射复杂靶标的高频电磁散射模型，可以满足大型靶标进行快速评估的需求。本文进一步提出了多次散射距离像位置快速预测方法，通过多次散射射线分集结合射线路径相位理论预估，快速推导了多次散射等效视在中心的位置，揭示了含腔靶标的多路径散射机理与作用过程；并通过舰船目标的仿真与分析，建立了大型靶标多次散射形成的强散射贡献与其具体几何结构之间的映射关系。

Fast Prediction and Analysis of Radar Characteristics of Target

Fast prediction and analysis of radar characteristics of complex targets with multiple scattering is an important basis for target design optimization and is also one of the important research topics in the field of electromagnetic scattering modeling. Multiple scattering structure and complex scattering mechanism lead to low simulation efficiency and difficulty in characteristic analysis of radar target. In this paper, a high frequency electromagnetic scattering accele?ration method for targets is proposed, which combines CPU multi?core parallel technology, GPU hardware acceleration technology and KD?Tree traversal technology. The high frequency electromagnetic scattering model of complex targets including ships with cavity, angular reflector arrays and ships is established, which can satisfy the needs of rapid evaluation of large targets. Further, a fast prediction method for multiple?scattering range image position is proposed. By combining multiple?scattering ray diversity with ray path phase prediction theory, the multiple?scattering equivalent appa?rent position of the center is deduced rapidly, and the multipath scattering mechanism and action process of the target containing cavity are revealed. Through the simulation and analysis of ship target, the mapping relationship between the strong scattering contribution formed by multiple scattering of large target and its specific geometric structure is established.