ID 原文 译文
17215 针对这一问题，该文提出一种基于稳健型双层叠组LASSO回归模型的交替方向多乘子算法(RTGL-ADMM)。 To this end,a novel and Robust Two-tier Group LASSO-Alternating Direction Method of Multipliers (RTGL-ADMM) isproposed in this paper, which is capable of enhancing block sparsity structures of the targets-of-interests.
17216 该算法在ISAR目标稀疏先验的基础上，进一步引入目标散射体空间连续性结构特征先验知识，并应用混合范数进行定量表征。 Based on the sparse prior of the target, the proposed algorithm further introduces the prior knowledge of spatial continuity structure of the target’s scatters, and the  mixed norm is accordingly used to formulate the prior.
17217 接下来，在ADMM框架下引入非平滑的混合范数惩罚项，并将距离向和方位向雷达回波复数据分别进行分组处理后再使其双层叠加， Next, the non-smooth  mixed norm penalty term is presented under the ADMM framework, wherethe scatters in both range and azimuthal directions are grouped and overlapped to enhance the block sparsityouter the groups.
17218 然后对混合范数对应的邻近算子进行对偶迭代运算，实现“分解-协同”框架下结构与组稀疏特征的有机调和，从而在对ISAR数据稀疏成像的同时实现结构特征增强。 According to the theory of ADMM, the proximal mapping of the  mixed norm is solvedand dually iterated to achieve a robust and efficient solution. The proposed algorithm proceeds in the"Decomposition-Coordination" manner, which guarantees superior convergence. In this way, the sparse imagingof ISAR data is combined with the enhancement of structural features.
17219 实验验证采用ISAR仿真复数据与Yak-42实测数据，针对RTGL-ADMM成像进行定性分析。 The experiment verifies the adoption ofISAR simulation complex data and YAK-42 measured data, and conducts qualitative analysis against RTGL-ADMM.
17220 继而采用相变曲线图定量分析RTGL-ADMM在不同参数调节下的成像能力，从而验证了该文所提算法应用于ISAR高分辨成像时的稳健性与优越性。 Then the phase transition curve is used to analyze quantitatively the imaging capability of RTGL-ADMM under different parameters, thus verifying the robustness and superiority of the proposed algorithm inthe application of ISAR high-resolution imaging.
17221 针对低轨(LEO)双星到达时间差(TDOA)定位系统中雷达信号的定位模糊问题，该文分析了高重频信号的模糊特性，演示了虚假定位点的产生过程，提出一种基于时差序列变化趋势匹配(VTMT)的定位模糊消除算法。 In order to mitigate the location ambiguity of radar signal in Low Earth Orbit (LEO) dual-satelliteTime Difference Of Arrival (TDOA) location system, the ambiguous characteristics of high PRF signal areanalyzed, the process of ghost location generating by ambiguous TDOA is introduced, and a method forlocation ambiguity mitigation by Variation Trendline Matching of TDOA (VTMT) is proposed.
17222 在测量时差序列与定位结果对应的理论时差序列之间的残差近似服从正态分布的条件下，通过两个序列的欧式距离作为相似程度衡量依据，筛选出测量时差线与理论时差线最为接近的定位点作为目标辐射源真实位置。 If the conditionthat the residuals between the measured TDOA series and the theoretical TDOA series corresponding to thepositioning results approximately obey normal distribution is satisfied, the location where the measured TDOAline is closest to the theoretical TDOA line can be selected as the real position of radar emitter with theEuclidean distance being used to measure the similarity between the two series.
17223 校验台测试信号验证了该算法的有效性。 Test signal of calibrationstation validates the effectiveness of the proposed method.
17224 仿真结果表明，该算法能够显著提高无模糊定位概率，对长基线时差定位系统中雷达信号的定位具有较高的应用价值。 Numerical simulations demonstrate that theproposed method can increase the probability of unambiguous location significantly, reduce the requirements ofTDOA measurement accuracy and observation time. The proposed method has good prospect for applicationsto TDOA location of radar signal in long base line location systems.