非理想条件下的MIMO高频天波雷达杂波分离理论与方法研究

项目名称： 非理想条件下的MIMO高频天波雷达杂波分离理论与方法研究

项目编号： No.61301209

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 侯煜冠

作者单位： 哈尔滨工业大学

项目金额： 24万元

中文摘要： 俯仰DOD随探测距离变化的MIMO高频天波雷达通过俯仰向联合发射接收自适应波束形成实现对电离层多模杂波的有效抑制。目前，该方法的应用与性能分析是在方位向俯仰向不存在互耦且俯仰向分辨力足够大等理想条件下获得的。针对该方法理论的不足，本项目拟探索基于方位向俯仰向互耦且俯仰向分辨力受限条件下的MIMO高频天波雷达杂波分离理论与新方法。首先，在定量分析俯仰分辨力受限对MIMO雷达性能影响的基础上，拟提出在目前所采用的俯仰DOD配置的基础上增加辅助发射波束的新方法，使俯仰DOD参数在最大信杂噪比意义上实现最优化。其次，在定量分析方位向俯仰向互耦影响的基础上，拟提出基于核方法的互耦影响最优化方法。最后，结合马尔科夫链模型与矩阵扰动理论分析非理想条件下的收敛性问题，拟提出基于ICA的杂波分离方法的收敛性优化方案，并研究最佳分离矩阵的选取方法。

中文关键词： MIMO雷达；高频天波雷达；杂波分离；；

英文摘要： The effective clutter mitigation can be implemented by the joint transmit and receive adaptive beamforming with the range-dependent direction-of-arrival (DOD) in multiple-input multiple-output (MIMO) high-frequency (HF) skywave radar. However, the current approach is based on some ideal conditions, for example, ignoring the effect of azimuth-elevation coupling and assuming sufficient elevation resolution capabilities. Therefore, aiming at this shortage, this research explores a theory and a new approach of clutter mitigation in MIMO HF skywave radar based on the azimuth-elevation coupling and the limited resolution capabilities. Firstly, based on the quantitative analysis of MIMO radar performance influenced by the limited resolution capabilities, a new algorithm is presented with adding some aided transmit beams, and the DOD parameter optimization is implemented with the maximum signal to clutter pluse noise ratio (SCNR) criterion. Secondly, based on the quantitative analysis of MIMO radar performance influenced by the azimuth-elevation coupling, the optimization criterion based on the kernel approach is proposed to minimize the effect of azimuth-elevation coupling. Finally, combining with the Markov model and the matrix perturbation theory, the convergence analysis of the clutter mitigation approach is impleme

英文关键词： MIMO Radar；HF Skywave Radar；Clutter Mitigation；；