MIMO地基雷达微小形变探测建模与仿真

发布时间：2019-04-11 17:04

【摘要】：针对现有地基山体滑坡雷达实时性差、系统复杂的缺陷,将多输入多输出技术应用到地基山体滑坡雷达,建立基于多输入多输出的地基山体滑坡雷达微小形变探测的数学模型。将多输入多输出天线阵列等效为其对应的虚拟线性阵列,在这个等效线阵的基础上利用后向投影成像算法对雷达回波数据进行成像处理。成像后得到每个像素点的复散射强度,复影像对中对应像素点的复散射强度做复共轭运算,提取出差分相位,由其与微小形变建立数学关系。设置了雷达探测的模拟实验场景参数,依据所建立的模型编写仿真程序。仿真实验表明,雷达系统具有毫米级的理论形变探测能力,系统微小形变探测的相对误差在5%以内,理论模型的正确性得到验证。
[Abstract]:In view of the defects of the existing ground landslide radar such as poor real-time performance and complex system, the multi-input multi-output technology is applied to the ground landslide radar, and the mathematical model of the ground landslide radar micro-deformation detection based on the multi-input multi-output radar is established. The multi-input multi-output antenna array is equivalent to its corresponding virtual linear array. On the basis of this equivalent linear array, the radar echo data are processed by using the back projection imaging algorithm. After imaging, the complex scattering intensity of each pixel is obtained, and the complex scattering intensity of the corresponding pixel in the complex image pair is performed complex conjugate operation, and the phase of travel is extracted, and the mathematical relationship between the complex scattering intensity of each pixel and the small deformation is established. The simulated experimental scene parameters of radar detection are set, and the simulation program is compiled according to the established model. The simulation results show that the radar system has the capability of detecting theoretical deformation at millimeter level and the relative error of detecting small deformation is less than 5%. The correctness of the theoretical model is verified.
【作者单位】：桂林电子科技大学广西无线宽带通信与信号处理重点实验室;桂林电子科技大学信息与通信学院;
【基金】：国家自然科学基金项目(61561010) 广西自然科学基金项目(2013GXNSFAA019323) 广西科学研究与技术开发计划项目(桂科攻14122006-6) 广西教育厅科研立项项目(KY2015LX096)
【分类号】：TN958

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