Airborne Downward-looking MIMO 3D-SAR Imaging Algorithm Based on Cross-track Thinned Array
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摘要: 基于阵列天线的SAR 3维成像技术是实现SAR 3维高分辨成像的重要方式之一。该文通过沿飞行平台跨航向稀疏地布置多个收发天线阵列单元，构造了跨航向稀疏下视阵列天线构型的MIMO(多发多收)机载3D-SAR，并分析了跨航向稀疏下视阵列MIMO机载3D-SAR的成像几何、3维回波信号模型，提出了适用于跨航向稀疏下视阵列MIMO机载3D-SAR的3维成像算法，最后通过仿真实验验证了算法的有效性并对结果进行了分析。
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关键词:
- 3维SAR /
- 稀疏阵列 /
- 多发多收(MIMO) /
- 机载下视三维成像
Abstract: Three dimensional SAR imaging technology based on linear array is one of the most important three dimensional SAR high resolution imaging methods. In this paper, transmit and receive antenna elements are placed to form cross-track thinned downward-looking array MIMO 3D-SAR. The imaging geometry and three dimensional echo signal model of cross-track thinned array MIMO 3D-SAR is analyzed, and an applicative imaging algorithm based on cross-track thinned array MIMO 3D-SAR is given. Finally, by emulation experiments, the imaging algorithm is verified and the 3D-SAR imaging results are analyzed.-
Key words:
- 3D-SAR /
- Thinned array /
- MIMO /
- Airborne downward-looking three-dimensional imaging
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