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多散射中心
相关语句
  multiple scattering centers
    range' s analysis result for targets with multiple scattering centers or low altitude.
    给出了多散射中心目标和低空目标的多频连续波测距性能的结论。 本部分主要包括论文的第二、三、四、五章。
短句来源
    In this paper,the step frequency response equation of optical-region radar target is firstly established by using theories of multiple scattering centers and local resonance.
    本文首先根据多散射中心理论与局部谐振原理,建立了雷达目标在光学区阶梯频率波形激励下的响应方程。
短句来源
  scattering centers
    range' s analysis result for targets with multiple scattering centers or low altitude.
    给出了多散射中心目标和低空目标的多频连续波测距性能的结论。 本部分主要包括论文的第二、三、四、五章。
短句来源
    In this paper,the step frequency response equation of optical-region radar target is firstly established by using theories of multiple scattering centers and local resonance.
    本文首先根据多散射中心理论与局部谐振原理,建立了雷达目标在光学区阶梯频率波形激励下的响应方程。
短句来源
    Ultra wide band radar has high range resolution capability, when UWB signals interact with target, and the responses of target are composed of many separate scattering centers.
    超宽带雷达具有高分辩能力,它探测到复杂目标时,目标总的电磁散射是多散射中心的合成,回波信号不同于普通的窄带雷达回波。
短句来源
    Based on the radar return model of the target with a collection of scattering centers,target motion induced Doppler effect of UWB (ultra wideband) radars is analyzed. Doppler time shift,a time domain expression of Doppler effect in carrier free UWB radars is proposed.
    从多散射中心目标的回波模型入手 ,分析了无载波超宽带雷达目标运动引起的多普勒效应 ,得出了无载波超宽带雷达多普勒效应的时域表现形式 -多普勒时移 ,对一种基于多普勒时移的时域多普勒处理器进行了Matlab仿真。
短句来源
  “多散射中心”译为未确定词的双语例句
    First the 3-D scattering model of the targets is built based on the theory of radar target scattering center in the optics region and measure data,then by comparing the profiles of actual target with the profiles of model target,the two most resemble profiles are regarded as the target recognition result.
    该算法首先从光学区雷达目标的多散射中心理论出发,在大量实测(暗室或外场测量)数据的基础上,建立待识别目标的三维电磁散射模型。 目标识别时,用目标的实测距离像与数据库中所有目标的三维散射模型在任意姿态角上的投影形成的距离像进行匹配,取相关性最强的目标类型作为识别输出结果。
短句来源
    Based on the multi scattering center theory, the frequency model describing electromagnetic scattering characteristics of target is developed.
    首先从目标多散射中心理论出发,推演了描述目标散射特性的频域散射数学模型。
短句来源
    In chapter 4, firstly, the two-dimension scattering model of target under high resolution radar system is developed, the two dimension resolution rates are reviewed and coordinate transformation of data are discussed.
    第四章在宽带体制下,推导了目标多散射中心的二维频域散射数学模型,分析了目标二维结构成像的两维分辨力和测量数据的坐标变换。
短句来源
    It systematically analyzes and studies the application of inverse Fourier transforms and wavelet transforms in the signal processing of interpulse stepped frequency radar returns, which adopts advanced interpulse stepped frequency high resolution radar technology and is based on multitude scattering center theory. The kinds of experiment are simulated by computer, pleased results are achieved.
    论文采用先进的脉间频率步进高分辨率雷达技术,以目标的多散射中心理论为基础,系统地分析与研究了逆傅立叶变换和小波变换在脉间频率步进雷达回波信号处理中的应用,并通过计算机仿真实验,取得了令人满意的结果。
短句来源
    With a modest bandwidth of transmitted signal,the spacial distribution along radar radial range axis which is called range profile can be obtained from received signal.
    宽带高频雷达可以获得目标多散射中心在径向距离轴上的投影分布,即目标的一维距离像;
短句来源
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  scattering centers
The Hough transform and the least squares method are used to extract the stable scattering centers and their scattering coefficients.
      
Distribution of scattering centers (filler particles and pores) in films of an ultra-high-molecular-weight polyethylene xerogel was studied by IR spectroscopy and optical microscopy.
      
The method of diffraction scattering of high-frequency electromagnetic waves at large distances from the scattering centers in crystalline systems and its application to the structural analysis of substances are considered.
      
The appearance of scattering centers in the crystals correlates with the high content of sodium whose critical concentration is about 0.021 wt %.
      
The mechanism of formation of light-scattering centers in sapphire crystals grown in gas atmospheres
      
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At high frequencies,radar target can be described as returns from multiple scattering centers and the returns reveal precision geometric shape information of target.With a modest bandwidth of transmitted signal,the spacial distribution along radar radial range axis which is called range profile can be obtained from received signal.By polarization data processing of each scattering center isolated on range axis,the geometric shape and structure of the scattering center can be obtained.And the range-polarization...

At high frequencies,radar target can be described as returns from multiple scattering centers and the returns reveal precision geometric shape information of target.With a modest bandwidth of transmitted signal,the spacial distribution along radar radial range axis which is called range profile can be obtained from received signal.By polarization data processing of each scattering center isolated on range axis,the geometric shape and structure of the scattering center can be obtained.And the range-polarization reconstructure is obtained from multiple scattering centers.This paper studies the theory of target rangeploarization reconstucting and presents a novel method of obtaining R-P reconstructure under strong land clutter background.The results are shown by computer simulation.

在高频区(光学区),雷达目标回波可模型化为多个散射中心回波的合成,隐含着目标精密的几何形状信息;宽带高频雷达可以获得目标多散射中心在径向距离轴上的投影分布,即目标的一维距离像;对距离像上孤立的每个强散射中心进行极化描述,可获得其对应的单元散射体的几何结构特性;由多个单元散射体可构造出目标的结构图像,即距离──极化结构图像,文中主要给出了强杂波背景下目标结构成像的原理、方法及其计算机仿真结果。

Based on the concept of scattering center and applying approximation scale re- lationship of back scattering signals in two near aspect angles,this paper adopts Mellin transform to reconstruct target's pattern and to overcome effectively problems of features extraction caused by the factor that scattering centers arc sensitive to the changes of aspect angles.By using three cale aircraft targets(Q7,B52 and Mig27),the recognition experimental study has been done. The results show that the method presented in the...

Based on the concept of scattering center and applying approximation scale re- lationship of back scattering signals in two near aspect angles,this paper adopts Mellin transform to reconstruct target's pattern and to overcome effectively problems of features extraction caused by the factor that scattering centers arc sensitive to the changes of aspect angles.By using three cale aircraft targets(Q7,B52 and Mig27),the recognition experimental study has been done. The results show that the method presented in the paper is effective and feasible.

准光学区目标对高分辨探测信号的散射,表现出多散射中心。本文利用目标的这一物理特性,推导了相邻两个观测方位角上散射信号的近似比例关系,采用梅林变换重建了目标类模式,有效地克服了目标散射中心模型的参数敏感于观测方位角变化而带来的特征选择的困难。文中针对三种飞机目标(歼七、B52、Mig27)进行了识别实验研究,结果表明了本文所提出的目标识别方法是有效可行的。

In this paper,the step frequency response equation of optical-region radar target is firstly established by using theories of multiple scattering centers and local resonance. In the equation,different approximate model is used to describe the local Rayleigh or resonant response of each scattering center. Then a novel method of target structure imaging based on band-limited response data for target spacial features extraction is presented. The obtained quasi-two-dimensional image provides target features of not...

In this paper,the step frequency response equation of optical-region radar target is firstly established by using theories of multiple scattering centers and local resonance. In the equation,different approximate model is used to describe the local Rayleigh or resonant response of each scattering center. Then a novel method of target structure imaging based on band-limited response data for target spacial features extraction is presented. The obtained quasi-two-dimensional image provides target features of not only range response under wide-band waveform stimulation,such as one-dimensional range profile,but geometrical structure category of each local scattering center also. The features can be used for radar target identification.

本文首先根据多散射中心理论与局部谐振原理,建立了雷达目标在光学区阶梯频率波形激励下的响应方程。在这种方程中,每个散射中心的局部瑞利或谐振响应曲线用各种不同的近似模型去逼近;然后导出了从目标的限带响应数据中抽取目标空间特征的结构成像方法,所得到的目标准二维图像既揭示了目标在宽带波形激励下的距离响应特征(即一维距离像),又反映了目标各局部散射中心的几何类型特征,可用于雷达目标的识别。

 
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