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摘要: 随着雷达目标探测需求的增加,基于压缩感知(CS)模型的稀疏恢复(SR)技术被广泛应用于雷达信号处理领域。该文首先对压缩感知的基本理论进行梳理;接着从场景稀疏以及稀疏观测两个角度介绍了雷达信号处理中的稀疏特性;然后基于稀疏特性,从空域处理、脉冲压缩、相参处理、雷达成像以及目标检测等角度概述了压缩感知技术在雷达信号处理中的应用。最后,对压缩感知技术在雷达信号处理中的应用进行了总结。Abstract: With the growing demand for radar target detection, Sparse Recovery (SR) technology based on the Compressive Sensing (CS) model has been widely used in radar signal processing. This paper first outlines the fundamental theory of SR and then introduces the sparse characteristics in radar signal processing from the perspectives of scene sparsity and observation sparsity. Subsequently, it explores these sparse properties to provide an overview of CS applications in radar signal processing, including spatial domain processing, pulse compression, coherent processing, radar imaging, and target detection. Finally, the paper summarizes the applications of CS in radar signal processing.
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Key words:
- Sparse Recovery (SR) /
- Compressive Sensing (CS) /
- Coherent processing /
- Target detection /
- Radar imaging
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表 1 计算结果对比图
Table 1. Comparison chart of calculation results
理想角度位置 误差 OMP算法(°) $ \begin{gathered} \left( {{\theta _1},{\phi _1}} \right) = \left( {{{\text{0}}^ \circ }, - {{\text{3}}^ \circ }} \right) \\ \left( {{\theta _{\text{2}}},{\phi _{\text{2}}}} \right) = \left( {{{\text{0}}^ \circ },{{\text{2}}^ \circ }} \right) \\ \end{gathered} $ $ {\hat \theta _1}{-}{\theta _1} $ 0 $ {\hat \phi _1}{{-}}{\phi _1} $ 2 $ {\hat \theta _2}{{-}}{\theta _2} $ 0 $ {\hat \phi _2}{{-}}{\phi _2} $ 4 表 2 成像性能分析
Table 2. ISAR imaging performance analysis
稀疏采样率 RMSE CORR 0.1 0.95 0.32 0.2 0.87 0.49 0.3 0.78 0.63 0.4 0.68 0.74 0.5 0.58 0.82 0.6 0.49 0.88 0.7 0.40 0.92 0.8 0.31 0.95 -
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