ID 原文 译文
19975 然后给出空间中只存在期望信号时，子阵与全阵间阵列流型的映射关系，据此推导全阵扩展变换，并证明其在干扰信号存在条件下的有效性； Then the mapping between the array manifold of sub-aperture array andthe full-aperture array is analyzed when only the desired signal exists in the space. On this basis, the extension transformation is derived with its effectiveness proved in the presence of interference signals.
19976 最终利用扩展变换获取全阵最优权矢量，实现相干波束形成。 At last, the optimal weight vector of the adaptive beamformer for coherent interference is obtained by extension transformation.
19977 该算法对期望信号波达角估计误差稳健，且无需干扰信号来向的先验信息，同时可以有效避免阵列孔径的损失。 Requiring no prior information of the DOA of the interference signals, the new method is robust to the DOA estimation error, and can avoid the loss of array aperture.
19978 仿真分析验证了算法的优越性和理论分析的有效性。 The effectiveness and superiority of the new algorithm are verified by simulation analysis.
19979 随着对地观测技术的发展，要求SAR系统能够同时实现高分辨率和宽测绘带，天基阵列多通道SAR结合数字波束形成(DBF)技术为解决该问题提供了很好的思路， With the development of earth remote sensing technology, SAR system is required to obtain high resolution and wide swath simultaneously, the space borne array SAR combined with Digital Beam Forming(DBF) technology provides a good solution to solve the problem.
19980 但各个通道之间相位误差会很大程度上降低DBF的性能，常规通道误差补偿方法估计精度不足，应用场景受限。 However, the phase error between channels will degrade the quality of DBF, and the traditional compensation methods suffer from large error or limited application.
19981 针对上述问题，该文提出一种基于方向图和多普勒相关系数的天基阵列SAR通道相位误差补偿方法，不仅利用天线方向图先验信息，还充分利用场景不同多普勒相关性信息，通过最小化天线方向图和多普勒的组合差异，实现对通道之间相位误差的估计。 In this paper, a compensation method based on antenna pattern and Doppler correlation coefficient is proposed, using the antenna pattern and meanwhile utilizing the Doppler correlation coefficient. By minimizing the combined cost function, the phase error between channels are estimated.
19982 结合RADAR-SAT数据的仿真试验结果验证了该算法的有效性。 Simulation resultsusing RADAR-SAT data validate the effectiveness of the proposed method.
19983 基于非相似余度架构(DRS)的网络空间安全技术是一种主动防御技术，其利用非相似性、冗余性等特性阻断或者扰乱网络攻击，以提高系统的可靠性和安全性。 The Dissimilar Redundancy Structure (DRS) based cyberspace security technology is an active defense technology, which uses features such as dissimilarity and redundancy to block or disrupt network attacks to improve system reliability and security.
19984 该文在研究异构性是如何提高系统的安全性的基础上，指出对异构性进行量化评估的重要性，将DRS的异构性定义为其执行体集的复杂性与差异性，并依此提出一种量化异构性的方法。 By analyzing how heterogeneity can improve the security of the system, the importance of quantification of heterogeneity is pointed out and the heterogeneity of DRS is defined as the complexity and disparity of its execution set. A new method which is suitable for quantitative heterogeneity is also proposed.