机载极化阵列多输入多输出雷达极化空时自适应处理性能分析

发布时间：2018-04-22 07:39

本文选题：机载多输入多输出雷达 + 极化阵列　；参考：《物理学报》2017年04期

【摘要】：为进一步提升机载多输入多输出(MIMO)雷达空时自适应处理(STAP)的杂波抑制与目标检测性能,本文提出基于极化阵列MIMO雷达的极化空时自适应处理(PSTAP)方法.首先,将新型的极化阵列应用于机载MIMO雷达,建立了机载极化阵列MIMO雷达极化空时自适应处理的信号模型.然后,基于分辨格思想,将杂波影响等效为与杂波自由度相关的独立杂波点源的形式,得到极化阵列MIMO雷达极化空时自适应处理协方差矩阵的等价表示.进而,结合上述等价协方差矩阵,对极化阵列MIMO雷达极化空时自适应处理的输出信杂噪比(SCNR)性能进行了推导分析,讨论了其中极化、空、时匹配系数的影响.理论分析表明,通过利用附加的极化域信息,极化阵列MIMO雷达极化空时自适应处理相比于传统MIMO-STAP能够有效提升杂波抑制性能,更有利于慢速运动目标检测,并且目标与杂波极化参数差别越大,输出SCNR的性能改善效果越明显.仿真结果验证了本文所提极化阵列MIMO雷达极化空时自适应处理方法的有效性与优越性.
[Abstract]:In order to further improve the clutter suppression and target detection performance of airborne multiple-input multiple-output (MIMO) radar, a polarimetric space-time adaptive processing method based on polarimetric array MIMO radar is proposed in this paper. Firstly, a new polarimetric array is applied to airborne MIMO radar, and a signal model of polarimetric space-time adaptive processing for MIMO radar is established. Then, based on the idea of discriminant lattice, the clutter effect is equivalent to the independent clutter point source related to the degree of freedom of the clutter, and the equivalent representation of the polarization space-time adaptive processing covariance matrix of polarimetric array MIMO radar is obtained. Furthermore, combined with the above equivalent covariance matrix, the output signal-to-noise ratio (SSRR) performance of polarimetric array MIMO radar is derived and analyzed, and the effects of polarization, space-time matching coefficients are discussed. Theoretical analysis shows that polarimetric space-time adaptive processing of polarimetric array MIMO radar can effectively improve clutter suppression performance and be more favorable to slow moving target detection than traditional MIMO-STAP by using additional polarization domain information. The bigger the polarization parameter difference between target and clutter is, the better the performance of output SCNR is. The simulation results verify the effectiveness and superiority of the proposed polarization array MIMO radar polarization space-time adaptive processing method.
【作者单位】：信息工程大学导航与空天目标工程学院;
【基金】：国家自然科学基金(批准号:61501513,41301481)资助的课题~~
【分类号】：TN957.51

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