ID 原文 译文
23225 随着合成孔径雷达(SAR)的发展，对目标细节的观测越来越受到重视。 The past decades have witnessed an increasing attention for detailed observation with developing of Synthetic Aperture Radar (SAR).
23226 SAR 图像的分辨率越高，获取的细节信息就越多。 The higher the resolutions of SAR images are, the more detailed information can be obtained from the images.
23227 目前，一种实用性较高的技术是，利用步进频率线性调频信号波形获取超高分辨率 SAR 图像。 At the present stage, the stepped frequency chirp signal waveform is a technology with high practicality to achieve the high range resolution imaging.
23228 这种技术基于不同子带信号的步进载频关系，通过子带拼接来合成大带宽信号。 The system can use the stepped frequency relationships between sub-band signals and then the sub-band synthesizing technique is applied to synthesize a large bandwidth signal.
23229 然而，子带拼接对于基带信号误差非常敏感，该文首先提出一种基于回归和统计学的信号预失真方案。 However, the sub-band synthesizing technique is very sensitive to the baseband signal error. A signal pre-distortion scheme is firstly proposed based on regression and statistics in this manuscript.
23230 在补偿完子带内的误差后，将子带间的误差转化为一个多变量的优化问题。 After compensating the error in sub-band, the problems of errors between sub-bands are transformed into a multi-variable optimization problem.
23231 最后，通过 X 波段机载 SAR 系统飞行实测数据验证了所提方法的有效性。 Finally, the effectiveness of the proposed method is verified by the X band airborne SAR system.
23232 精细化的回波微动调制分析是提取弹道目标运动几何特性的重要技术手段。 Accurate micro-motion characteristics analysis is an important technique to extract the geometrical characteristics of ballistic targets.
23233 该文提出一种多频点-调频傅里叶稀疏分解的微动估计方法来分析目标的时频特性。 In this paper, a multi-frequency Chirp sparse decomposition method for time-frequency analysis of micro-motion targets is proposed.
23234 首先，该文介绍弹道目标进动回波微多普勒的一般表达； First, the echo micro-Doppler expression of the equivalent scattering center model with the procession motion is deduced.