ID 原文 译文
21115 针对脉冲型噪声，该文提出一种新的非线性处理方法，即高斯化-广义匹配(GGM)处理。 A method based on Gaussianization and generalized matching, called Gaussianization-GeneralizedMatching (GGM) method is proposed, for nonlinear processing in impulsive noise.
21116 GGM方法基于高斯化处理与广义匹配滤波，可结合非参数的概率密度估计进行设计，解决噪声模型未知时的非线性处理问题。 The GGM method can bedesigned based on noise samples, aided by nonparametric probability density estimation. Thus the GGM designis suitable for nonlinear processing in unknown noise models.
21117 该文以脉冲型噪声分布模型为例，分析GGM方法的特点和性能；再结合Class A噪声模型，讨论GGM设计作为非参数方法相比模型假设失配的优势；引入效能函数，验证GGM方法在恒虚警技术中的运用。 The GGM method in the  model is analyzed,and also the comparison with another approach is presented based on unmatched noise model assumption inthe Class A noise. The GGM method is applied to the constant false alarm rate technique via the efficacyfunction.
21118 结果表明，在已知噪声分布情况下，GGM方法具有次优检测性能；当噪声模型未知时，非参数GGM设计能保持稳健性能，优于模型失配下的处理。 Simulation and analysis results show that the GGM design is sub-optimal, works robustly when thenoise model is unknown, and raises a low requirement on the sample number.
21119 并且，GGM设计对样本数目要求不高，为噪声特性不明或时变的场景提供了一种新的信号处理方法。 Thus, the GGM method providesa promising choice when the noise model is unclear or time-varying.
21120 为了提高SAR系统的分辨率，在距离向可以通过发射一系列不同载频的窄带信号，通过信号处理的方法实现带宽合成，进而得到等效大带宽信号对应的分辨率。 To improve the resolution of the SAR system, radar bandwidth should be improved. By means of synthetic bandwidth, wide bandwidth can be achieved with less hardware complexity.
21121 为有效实现带宽合成，要求不同子带回波的载频步进值严格已知，这在某些实际应用环境中，并不能总是满足，因而需要从回波数据中直接估计步进值。 For frequency band synthesis SAR system, frequency difference should be accurately known. However, in the real measurement situation, the frequency difference may drift and should be estimated based on the raw data.
21122 该文提出一种基于子带回波数据的载频误差估计与补偿方法。 In this manuscript, an effective method is proposed to estimate the frequency difference error and compensate the phase error.
21123 该方法基于压缩后子带回波数据多普勒相位与载频的关系，对子带图像进行干涉处理，提取差分相位， Based on the relation between the interferometric phase of subband echoes and frequency difference, the frequency difference drift is estimated. The interferometry between subband images yields the interferometric image. It is observed that in the yielded image, phase varies with range and the slope is proportional to the frequency difference. Also, the phase is redundant along azimuth.
21124 并利用差分相位沿方位向的冗余进行相干积累，获得以实际载频步进值为振荡频率的单频信号，进而通过频谱分析方法得到误差频率，并对子带间相位误差进行补偿。 Based on the redundancy along azimuth, a new vector is formed. The vector is a sinusoidal signal with the frequency value corresponding to the relative range shift. Frequency analysis yields the value of the frequency difference error.