基于深度学习的捷变相参雷达1-Bit块稀疏重构

近年来,量化压缩感知理论在雷达目标参数估计问题中得到了广泛应用,其主要思想是对采样回波数据进行量化,并将雷达观测模型建模为欠定方程,再利用压缩感知理论对稀疏目标信号进行恢复,降低回波数据的位宽,达到简化系统、提升效率的目的 .本文建立了捷变相参雷达信号的块稀疏压缩感知模型,并提出一种基于深度学习的1 Bit块稀疏重建网...

DNN based 1-bit block sparse recovery in frequency agile coherent radar

In recent years, the theory of quantized compressed sensing has received extensive attention and development in the problem of radar target parameter estimation. Its main idea is to quantify the sampled radar echo and model it as an underdetermined equation, then target signal recovery can be solved via quantized compressed sensing algorithms. As sampling data is quantized, the bit width is greatly reduced thus simplifying the system and improving efficiency. This paper formulates the parameter estimation problem for frequency agile coherent radars as an underestimated problem, and proposes a 1-Bit block-sparse reconstruction network based on deep learning, namely B-BAdaLISTA. Compared with the traditional binary iterative hard thresholding algorithm, this reconstruction network has similar reconstruction performance and faster recovery speed. At the same time, the block-sparse structure is integrated into the network structure, which greatly improves the quality of the recovery of target parameters. The simulation experiments verify the recovery performance of the proposed B-BAdaLISTA network under both noiseless and noisy cases.