机载时间调制机会阵的栅瓣抑制研究

The opportunistic phased array radar is a kind of new concept radar with distributed three dimensional array, which performs a variety of functions of radar, communications, electronic warfare by segmentation of antenna aperture. This project focuses on grating lobe suppression for airborne opportunistic phased array, which includes: To begin with, the mathematical model and the data model of airborne time modulated opportunistic phased array are established based on plane geometry, and the working element positions are calculated under the condition of geometric occlusion. Then, since grating lobe suppression for airborne opportunistic phased array is a high dimensional and nonlinear multi-objective problem, a multi-objective particle swarm optimization based on sequential quadratic programming algorithm is proposed for the optimal array layout. In addition, pattern synthesis method with the time modulation elements is presented, satisfying both segmentation of antenna aperture and grating lobe suppression. Finally, based on grating lobe suppression performance with random errors and components perturbation being analyzed theoretically and simulated, robust grating lobe suppression algorithms are proposed to resist array manifold mismatch. Our research achievements would develop and enrich radar array signal processing theory. This project is not only the foundation to study the technology of opportunistic phased array radar, but also the key to improve the aircraft survivability and combat capability in modern war.

机会阵雷达是具有分布式三维阵列结构的新概念雷达，利用天线孔径动态分割同时执行雷达、通信、电子战等多种功能。本项目重点研究机载机会阵的栅瓣抑制问题，主要内容包括：(1)研究机载时间调制机会阵的数学建模方法，并基于飞机几何外形建立机载机会阵的数据模型，计算遮挡条件下的有效工作阵面；(2)针对机载机会阵栅瓣抑制这一高维多目标非线性问题，提出基于多目标粒子群和序列二阶规划的混合算法，实现最优阵列布局方法进行栅瓣抑制；(3)在满足孔径资源划分需求和栅瓣抑制性能的条件下，研究工作阵元时间调制的最优方向图综合方法；(4)分析随机误差和飞机部件抖动条件下的机载机会阵栅瓣抑制性能，提出抗阵列流型失配的稳健栅瓣抑制算法。研究成果将发展和丰富雷达阵列信号处理理论，不仅是研究机会阵雷达技术的基础，还是提高现代战争中飞机生存能力和作战能力的关键。

机会阵雷达是具有分布式三维阵列结构的新概念雷达，利用天线孔径动态分割同时执行雷达、通信、电子战等多种功能。本项目重点研究了机载机会阵的栅瓣抑制问题，主要内容包括：(1)研究机载时间调制机会阵的数学建模方法，并基于飞机几何外形建立了机载机会阵的数据模型，计算遮挡条件下的有效工作阵面；(2)针对机载机会阵栅瓣抑制这一高维多目标非线性问题，提出了基于多目标粒子群/和声算法/正交微扰法和序列二阶规划的混合算法，实现了最优阵列布局方法进行栅瓣抑制；(3)在满足孔径资源划分需求和栅瓣抑制性能的条件下，研究了工作阵元时间调制的最优方向图综合方法；(4)分析随机误差和飞机部件抖动条件下的机载机会阵栅瓣抑制性能，提出了抗阵列流型失配的稳健栅瓣抑制算法。研究成果发展和丰富雷达阵列信号处理理论，不仅是研究机会阵雷达技术的基础，还是提高现代战争中飞机生存能力和作战能力的关键。