ID 原文 译文
16375 在自聚焦过程中，首先，构建基于频域近似观测算子的稀疏自聚焦模型并采用迭代软阈值方法(ISTA)进行求解，从而实现图像的粗聚焦和非空变运动误差的估计； In the process of autofocus, firstly, a sparse autofocus model based on thefrequency-domain approximate observation operator is constructed to focus the image roughly and estimate thenon-spatial-variant motion error parameters, and the Iterative Shrinkage-Thresholding Algorithm (ISTA) isused to solve the constructed sparse autofocus model.
16376 然后，采用稀疏自聚焦模型估计多个子区域的精确相位误差曲线，并基于最小二乘法估计空变的运动误差参数； Then, the precise phase error curves of multiple sub-regions are obtained by the sparse autofocus model and the least square method can be used to estimate thespatial-variant motion error parameters.
16377 最后，通过对近似观测算子的修正实现空变运动误差的补偿。 Finally, the compensation of spatial-variant motion error is realized bycorrecting the approximate observation operator.
16378 仿真实验验证了该方法的有效性。 The simulation results show the effectiveness of the proposedmethod.
16379 通过对干涉仪通道间信号相位差的多次测量求平均来减小测量误差是工程上提高干涉仪测向精度的重要途径之一， It is one of the important approaches to improve the direction finding accuracy of interferometer toreduce the measurement error by averaging the signal phase difference between the channels in theinterferometer.
16380 在这一过程中有标量积累与矢量积累两种方式。 In this process, there are two methods: scalar accumulation and vector accumulation.
16381 为了分析这两种积累方式的特性，该文在对干涉仪测向模型与相位差形成过程简要介绍之后，基于信号矢量方法获得了相位差的统计特性， In order to analyze on these two methods, after a brief introduction to the direction finding model of interferometer and the formation process of phase difference, the statistical characteristics of phase difference are deduced by using the signal vector method.
16382 并利用推导得到的概率密度分布结果对相位差标量积累与矢量积累进行了详尽对比， Then a detailed contrast between scalar accumulation and vector accumulation ofphase difference is made by using the probability distribution results derived.
16383 不仅揭示了标量积累过程中的门限效应，而且从理论上证明了矢量积累对真实值的无限逼近过程。 This not only reveals thethreshold effect in scalar accumulation, but also the infinite approximation process of vector accumulation tothe real value is theoretically proved.
16384 最后通过仿真验证了理论分析的有效性与正确性。 Finally, the validity and correctness of the theoretical analysis are verifiedby simulations.