Autofocus generally encompasses two distinct steps, i. e. phase error estimation and phase error compensation.
自聚焦主要由两个重要步骤组成，即相位误差估计和相位误差校正。
A phase error model, in which the time synchronization error, frequency synchronization error and motion error are considered, reveals the sources of phase errors.
同步以及运动误差会引入相位误差，本文中提出了相位误差模型。
The phase error estimation part utilize one pilot tone to track the phase error and uses the estimation after compensation structure to improve precision.
残留相偏估计部分采用利用导频进行相偏跟踪的方法，并采用补偿后估计的结构来增加估计的精度。
Feeding error comprizes phase quantization error produced by digital phase shifter, array tolerance and the error produced by failure element.
馈电误差包括由数字移相器的使用引入的相位量化误差、阵列公差和失效单元引起的误差。
The error of phase synchronization among the three synchronizations will affect the phase error of SAR SLC image directly, and influence the elevation measurement precision sequentially.
三大同步中，相位同步误差直接影响SAR复影像的相位误差，从而影响系统的高程测量精度。
By using these methods, the system can be of the feature of zero phase error, and the filtering of EEG signals with zero phase error can be realized.
利用该方法可以使系统具有零相位特性，实现脑电信号的零相位失真滤波。
Aiming at the problem of phase error caused by normal filters in signal processing , summarizes the important meaning of digital filtering with zero phase error.
针对通常情况下滤波器引起的相移问题 ，概述零相位滤波的重要意义。
Aiming at the problem of phase error caused by normal filters in signal processing , summarizes the important meaning of digital filtering with zero phase error.
针对通常情况下滤波器引起的相移问题 ，概述零相位滤波的重要意义。
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