双基地多输入多输出虚拟阵列的稳健低旁瓣波束优化技术

发布时间：2018-05-14 16:43

本文选题：双基地多输入多输出 + 波形分集　；参考：《物理学报》2014年18期

【摘要】：双基地多输入多输出(MIMO)系统需要对目标的波达角和波离角进行二维估计,针对高分辨算法中阵列协方差矩阵处理运算量大以及估计性能对阵列流形失配敏感的缺陷,提出了一种基于二阶锥规划的抗阵列流形失配的双基地MIMO虚拟阵列波束优化算法.该方法利用MIMO的波形分集技术与双基地的目标定位解算,通过波达角和波离角在双基地定位椭圆上的对应关系,将双基地MIMO的二维合成方向矢量转化为一维的虚拟阵列流形,并证明了双基地MIMO虚拟阵列的波束图等效为发射波束图在接收阵角度域上的响应和接收波束图的合成.在优化波束图旁瓣的同时,该算法兼顾了固定方向上的相干干扰抑制,并提高了双基地MIMO虚拟阵列波束优化抗阵列流形失配的能力.通过波束图和方位谱优化的仿真分析和水池试验,验证了算法的有效性.
[Abstract]:The bistatic multi-input and multiple-output MIMOs need to estimate the DOA and the angle of departure of the target in two dimensions. In the high resolution algorithm, the processing of the array covariance matrix is heavy, and the estimation performance is sensitive to the mismatch of the array manifold, and the estimation performance is sensitive to the mismatch of the array manifold. A bistatic MIMO virtual array beam optimization algorithm against array manifold mismatch based on second order cone programming is proposed. By using the waveform diversity technique of MIMO and the bistatic target location solution, the two-dimensional synthetic direction vector of bistatic MIMO is transformed into a one-dimensional virtual array manifold through the corresponding relation between the angle of arrival and the angle of departure on the bistatic positioning ellipse. It is proved that the beam-pattern of bistatic MIMO virtual array is equivalent to the response of the beam-pattern in the angle domain of the receiving array and the combination of the beam-pattern. The algorithm not only optimizes the sidelobe of the beam map, but also takes into account the coherent interference suppression in the fixed direction, and improves the ability of the bistatic MIMO virtual array beam optimization to resist the array manifold mismatch. The effectiveness of the algorithm is verified by the simulation analysis of beam map and azimuth spectrum optimization and tank test.
【作者单位】：哈尔滨工程大学水声技术重点实验室;哈尔滨工程大学水声工程学院;
【基金】：国防基础科研计划(批准号:B2420132004) 国家高技术研究发展计划(批准号:2012AA090901-4)资助的课题~~
【分类号】：TN919.3

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