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Wideband electromagnetic characteristics modeling and analysis of missile targets in ballistic midcourse

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Science China(Technological Sciences) 2012年第6期55卷 1655-1666页

作者： XU ShaoKun LIU JiHong WEI XiZhang LI Xiang guo guirong School of Electronic Science and Engineering National University of Defense TechnologyChangsha 410073China

The wideband electromagnetic characteristics of missile targets in midcourse are the foundation of midcourse attack-defense confrontation. This paper proposes a novel electromagnetic scattering modeling method for midcourse targets based on a pre- cise scattering center model, in which the nonideal scattering phenomenon, shielding effect and micro-motion are taken into consideration for the first time. Firstly, a precise scattering center model incorporating both the sliding scattering and artist- tropic scattering is established. Then the change rule of the target attitude is generalized, and a checking method of the scatter- ing center shielding effect is proposed for rotationally symmetric targets. Afterwards, a novel dynamic electromagnetic scat- tering model is presented, where the scattering center model updates along with the variation of the target attitude and can characterize the change of the electromagnetic characteristics of midcourse targets exactly. Finally, in light of the established model, the dynamic electromagnetic characteristics within different attitude angle bounds are analyzed by stages, and some useful conclusions are obtained. Experiment results from the measured data in anechoic chamber verify the validity of the proposed modeling method and relevant analysis.

关键词： ballistic midcourse wideband electromagnetic characteristics micro-motion shielding effect nonideal scattering

RESEARCH ON MOTION COMPENSATION FOR HIGH RESOLUTION PROFILE OF EXTENDED TARGET FOR STEPPED CHIRP RADAR AND DSP IMPLEMENTATION

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Journal of Electronics(China) 2007年第2期24卷 191-198页

作者： Jiang Bin He Xiang Wang Hongqiang guo guirong ATR National Key Lab National University of Dcfcnse Technology Changsha 410073 China Beijing Univcrsity of Posts and Telccommunications Beijing 100876 China

A discrete model is set up for High Resolution Range Profile (HRRP) of an extended target and the model of echo from an extended target for a Stepped Chirp Radar (SCR) is proposed. The effect of target motion on a range profile is thoroughly analyzed, and based on which precision re- quirement is developed for motion compensation. By studying the time domain correlation and the rule based on the least burst error, a motion compensation algorithm which satisfies the project requirement is presented, and the cyber-emulation confirms the conclusion. At last the processor is designed by using DSP devices to realize motion compensation and target recognition.

关键词： Stepped chirp radar High Range Resolution Profile (HRRP) Motion compensation The least burst error rule DSP implementation

MODELING AND SIMULATION OF COMPOUND CLUTTER FOR COASTAL ENVIRONMENT

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Journal of Electronics(China) 2007年第4期24卷 496-502页

作者： Jiang Bin Wang Hongqiang He Xiang guo guirong A TR National Key Lab National Univ-ersity of Defense Technology Changsha 410073 China Beijing University of Posts and Telecommunications Beijing 100876 China

This paper introduces a novel clutter power model of coastal compound and deduces the statistic characteristics and the arithmetics of model parameter estimation algorithm. Then, a novel coastal compound distributed model of the clutter amplitude is proposed and its statistic character- istics are studied. Subsequently, the nonlinear relation of autocorrelation function is deduced between the coastal compound clutter random sequences and the correlated Gaussian random sequences, which is the important prerequisite for the clutter simulation based on the ZMNL (Zero Memory NonLin- earity). Lastly, the advantage of the algorithm is demonstrated by a feasible simulation of the gen- eration of the random coastal compound clutter sequences.

关键词： Coastal compound clutter Statistic characteristic Modeling and simulation Reliability in physics

Nonuniform stretch processing for the range profile of a target with micro-motion

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Progress in Natural Science:Materials International 2006年第11期16卷 1205-1213页

作者： CHEN Hangyong**, JIANG Weidong, LIU Yongxiang, LI Xiang and guo guirong(Institute of Space Electronics Information Technology, National University of Defense Technology, Chang Sha 410073, China) Institute of Space Electronics Information Technology National University of Defense Technology Chang Sha 410073 China

Complex motions such as micro-motions induce complex range-Doppler coupling effect in radar imaging. Hence, it is a challenge to reconstruct a clear range profile of a target with micro-motion. Stretch processing with fine motion compensation cannot perform well while it ties to eliminate the distortion of range profile caused by Doppler effect, because it is difficult to accurately estimate each scattering center velocity during coherent processing interval. Based on nonuniform stretch processing (NSP), a new technology is proposed to decouple range, time and Doppler and then achieve range profile of target with micro-motion. The new technology uses a new synthetic wide-band waveform and has an innovative mathematic interpretation. Statistical properties of the new approach are primarily examined. Typical models of target with micro-motion for high resolution radar are presented. Monte Carlo simulations demonstrate the performance of the new technology and the simulation results confirm our expectations.

关键词： synthetic range profile micro-motion stretch processing Doppler effect.

A New Effective Method for Ship Target Recognition

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Journal of Systems Engineering and Electronics 1990年第1期1卷 55-63页

作者： guo guirong, Yu Wenxian and Hu Bufa(Electrical Engineering Lab, Changsha Institute of Technology, Hunan) Electrical Engineering Lab Changsha Institute of Technology Hunan

In this paper, the problem of reliable automatic target recognition from incoherent radar returns is discussed and a new method for ship target recognition is proposed. Based on this method, an experimental system for ship target recognition is implemented. The results obtained from the theoretical and experimental study indicate that a high reliability of recognition can be achieved by using the designed recognition system. An average success rate of more than 90% is reached for 8 classes of ships.

关键词： Target recognition Recognition system Feature extraction.

Photoluminescence Properties of Porous Silicon Based on FZ(H) Si Wafer

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Rare Metals 2001年第1期20卷 38-42,57页

作者： Yuejiao He, Huaixiang Li, Chenghua guo, guirong Liu, Yansheng Chen, Shuzhen Duan (Institute of Semiconductors, Shandong Normal University, Jinan 250014, China Metallurgy School, University of Science and Technology Beijing, Beijing 100083, China) 山东师范大学山东济南 250014 北京科技大学北京 100083

The photoluminescence (PL) properties of porous silicon (PS) have been studied based on n-type single-crystal (111) silicon wafers (80-90 Omega .cm in the resistivity). The porous silicon layers (PSL) were created by anodizing the wafers with a denuded zone of 20-40 mum formed by neutron transmutation doping (NTD) and thermal treatment at 940 degreesC for 4 h and then 700 degreesC for 2 h, two-step heating of the floating-zone silicon (FZ Si) grown in a hydrogen (H,) ambience. By surface modification with stannic chloride or amine immersion and rapid thermal oxidation (RTO), the PL peak position from the PS can be qualitatively controlled factitiously. The as-prepared PS shows an orange-yellow luminescence, while the modified samples emit red, green and blue luminescence. Mechanisms for the different colors of the PL are discussed. Fourier transform infrared (FTIR) is carried out to analyze the differences in the structural configuration of the PS samples.

关键词： porous silicon photoluminescence surface modification rapid thermal oxidation

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弱S-嵌入子群与有限群的超可解

中山大学学报（自然科学版） 2013年第4期52卷 25-28页

作者：郭桂容赵涛六盘水师范学院数学系贵州六盘水553004 山东理工大学理学院山东淄博255049

群G的子群H被称为G的弱S-嵌入子群,是指存在G的正规子群T使得HT为G的S-可换子群且H∩T≤Hse,其中Hse是群G含于H的一个S-可换嵌入子群。研究了群G的某些素数幂阶弱S-嵌入子群对其超可解性的影响,同时也得到了关于饱和群系的几个新的刻画。

关键词： S-可换子群弱S-嵌入子群超可解群饱和群系

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基于电磁涡旋的雷达目标成像

国防科技大学学报 2013年第6期35卷 71-76页

作者：郭桂蓉胡卫东杜小勇国防科技大学自动目标识别重点实验室湖南长沙410073

作为信息载体的电磁波除了传统的携带信息方式外,近年来其波前以电磁涡旋形式展现的信息调制能力也越来越受到关注。本文综述了电磁涡旋在信息调制等方面的研究进展,阐述了其在雷达信息获取方面的潜在应用价值。针对圆形相控阵列,建立... 详细信息

作为信息载体的电磁波除了传统的携带信息方式外,近年来其波前以电磁涡旋形式展现的信息调制能力也越来越受到关注。本文综述了电磁涡旋在信息调制等方面的研究进展,阐述了其在雷达信息获取方面的潜在应用价值。针对圆形相控阵列,建立了电磁涡旋波照射下理想点散射目标的回波模型。将各阵元的接收信号按照与发射时相同的模式移相后,沿圆周积分即可获得雷达阵列的输出回波。该回波可表示为经平方Bessel函数调幅后的傅里叶基函数的线性组合。结合Bessel函数的频谱特性,分析了轨道角动量拓扑荷与方位角变量之间的近似对偶关系,利用逆投影和滤波-傅里叶变换方法进行了成像处理。仿真实验表明,电磁涡旋对雷达目标具有方位向成像的潜力。研究可为新体制的雷达设计、目标识别技术的发展提供参考和借鉴。

关键词：电磁涡旋轨道角动量雷达目标成像

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基于分形IFS的运动目标RCS序列分解

电子学报 1999年第9期27卷 12-15页

作者：黎湘庄钊文郭桂蓉国防科技大学ATR国家重点实验室长沙410073

针对运动目标ＲＣＳ变化规律，提出将目标ＲＣＳ变化序列分解为确定变化序列（ＣｅｒｔａｉｎＶａｒｉａｔｉｏｎＳｅｑｕｅｎｃｅ，ＣＶＳ）和随机变化序列（ＲａｎｄｏｍＶａｒｉａｔｉｏｎＳｅｑｕｅｎｃｅ ... 详细信息

针对运动目标ＲＣＳ变化规律，提出将目标ＲＣＳ变化序列分解为确定变化序列（ＣｅｒｔａｉｎＶａｒｉａｔｉｏｎＳｅｑｕｅｎｃｅ，ＣＶＳ）和随机变化序列（ＲａｎｄｏｍＶａｒｉａｔｉｏｎＳｅｑｕｅｎｃｅ，ＲＶＳ）的设想．其中ＣＶＳ敏感于姿态，在姿态域表现为丰富的细节特征，而ＲＶＳ则表现为近似正态分布的非平稳随机过程．本文用实验数据证明这两种变化序列均具有分形的特征．由以上的分析结果，利用分形迭代函数系统将这两种变化序列进行有效分解，其分解效果明显优于传统的滤波方法．

关键词：散射截面 RCS 分形迭代函数 IFS 分解雷达系统