Location method of near distance electromagnetic radiation source based on compressive sensing
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摘要:
提出了一种近距离电磁辐射源定位方法，针对常规多通道阵列系统复杂、硬件成本高、体积大等弊端，提出单天线单通道运动虚拟阵列系统，实现近场定位功能。在此基础上，提出利用辐射源在被测区域空间位置上的稀疏性，采用不驻停运动采样，并结合压缩感知算法，用较少的采样数据重构计算得到辐射源数量与位置。在保证定位精度的前提下减少了采样数据量，并消除了阵元多次采样的时间延迟可能造成的误差影响。经过仿真验证了方法的可行性后，设计了用于实际测试的系统并进行实验，取得了良好的效果。
Abstract:A locating method of near distance electromagnetic radiation source is proposed in this paper. To avoid the disadvantages of complexity, high hardware cost and large volume of the conventional multi-channel array system, a single antenna motion virtual array system is proposed to realize the function of the near-field location. On the basis, the sparsity of the radiation source in the spatial position of the measured area is proposed. The number and position of the radiation sources are reconstructed with less sampling data by using the non-stop motion sampling and the compressive sensing method. The sampling data quantity is reduced under the premise of ensuring the location accuracy, and the error effect caused by the time delay of the multiple sampling in every array element is eliminated. The feasibility of the method is verified by simulation. Then the system is designed for the actual test and good results have been achieved in the experiment.
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Key words:
- electromagnetic interference /
- fault location /
- near-field /
- virtual array /
- compressive sensing
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图 1 单天线单通道近场定位系统
Figure 1. Single antenna and single channelnear-field location system
图 2 近场定位空间稀疏性示意图
Figure 2. Schematic diagram of spatial sparsityof near-field location
图 6 不同目标源数量在不同虚拟阵元数下的定位成功率
Figure 6. Location success rate of different source quantity under different amount of virtual array elements
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