目标模型包括船舶的距离、方位、速度和回波幅度、幅度起伏。
The model of radar target is composed of distance, bearing, speed, heading and amplitude of echo, fluctuation.
论文针对L波段ISAR，通过四个数学模型仿真了电离层引起的目标回波相位起伏、折射效应以及回波幅度闪烁对ISAR图像的影响。
This paper gives four models to simulate effects of phase fluctuation, refraction and amplitude scintillation due to ionosphere on L-band ISAR.
介绍了雷达中频回波信号的设计原理，推导了不同波形种类的回波信号表达式，并为目标建立了4种截面积起伏模型。
The design principle of radar intermediate-frequency echo is introduced; different kinds of expression of echo signals are deduced, and 4 categories of wave of target cross section are modeled.
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