大气中基于多面体阵元能量辐射源有噪无源定向模型及抗噪研究

项目名称： 大气中基于多面体阵元能量辐射源有噪无源定向模型及抗噪研究

项目编号： No.61471069

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 王江

作者单位： 成都信息工程大学

项目金额： 82万元

中文摘要： 辐射源无源定向在军事、航天等领域一直是国内外研究热点，现有研究主要集中在空间谱估计和光学成像，空间谱估计尚存在实用化难题、系统结构复杂等不足，而光学成像存在定向视场不全、仅适用光辐射源的问题。本课题采用前期研究工作中提出的用多面体阵元探测得到的能量对空间辐射源无源定向的新方法，结合已建无源定向模型，分析大气中噪声源的特性，研究各噪声源对定向模型中变量的影响关系，并以此建立有噪无源定向模型。针对各噪声源，结合矩阵方程求解中最小二乘等算法，基于有噪无源定向矩阵方程建立抗噪方法，借鉴空间谱估计利用空域数据代替时域处理中时域数据的思路，探索利用噪声频谱或统计特征抑制抗噪的方法，基于各噪声源无源定向抗噪的研究方法和结果，进一步探索多噪组合无源定向抗噪方法。通过实测评估，给出各噪声的参考抗噪方法。本研究旨在为本课题定向方法的研究奠定理论基础，为其噪声环境的应用提供理论依据和参考方法，从而推进其实用化。

中文关键词： 多面体；阵元能量；辐射源；有噪无源定向模型；抗噪

英文摘要： The passive direction of the radiation sources has long been the hot topic in the aerospace and the military applications. Current researches mainly focus on the space spectral estimation and the optical imaging. The space spectral estimation has the difficulty of application and the system structure complication. The problem is the direction field of view in some parts in the optical imaging and it is valid to the optical radiation sources. By adopting the new method and the constructed passive direction model achieved in preliminary studies which direct to spatial radiation based on the array elements energy probed by sensors on the polyhedron. In this method, the character of noise sources in atmosphere is analyzed and the parameter relationship is established between the kind of noise sources and the variables in the direction model with no noise. By means of all kinds of ways, some noises combination passive direction is constructed in this research program. The algorithms such as least square in matrix equation are adopted for each noise sources, anti-noise methods are constructed based on matrix equation of direction with noise, by using spatial spectrum estimation thought which replaces the temporal data in time domain processing with spatial data, research anti-noise methods based on noise spectrum or statistical characteristics. Based on the research method and results of each noise sources, further explore the anti-noise method of passive direction with combination of noise sources. By measurements and evaluating, propose anti-noise method for the noise sources. This research program is design to establish the theoretical basis for the radiation sources model of passive direction with noise based on the array elements energy on the polyhedron, providing theoretical basis of application in noise and the reference method, push forward for the practical applications.

英文关键词： Polyhedron;Array Element Energy;Radiation Sources;Passsive Direction Model with Noise;Anti-Noise