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micro-doppler characteristics of sliding-type scattering center on rotationally symmetric target

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Science China(Information Sciences) 2011年第9期54卷 1957-1967页

作者： MA Liang,LIU Jin,WANG Tao,LI YongZhen & WANG XueSong School of Electronic Science and Engineering,National University of Defense Technology,Changsha 410073,China 1. School of Electronic Science and Engineering National University of Defense Technology Changsha 410073 China

The feature of micro-motion is one of the most effective features used for radar recognition in midcourse *** present,the study of feature extraction and recognition is usually based on the assumption that the micro-motion of the scattering center and warhead itself is the same,and the radar echo is sinusoid-FM ***,this assumption ignores the fact that the scattering center would slide on the warhead with the change of the aspect *** this paper,a complete micro-motion model is set for the scattering centers of different positions on the warhead,and the mathematical expression of the micro-doppler of the sliding-type scattering center is obtained for the first *** approximation of Taylor expansion under the background of missile confrontation is studied *** curve of this micro-doppler is not the generally assumed *** measurement of a precessional target in microwave anechoic chamber is done to vividly observe the sliding feature of the scattering *** measurement results agree with the theoretic analysis in this *** research on micro-doppler characteristics of sliding-type scattering center provides a more accurate model for the micro-motion simulation and feature extraction of precessional warheads.

关键词： rotationally symmetric target sliding-type scattering center precession micro-doppler

micro-doppler effect testing technique for attitude of projectile in space flight

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Journal of Beijing Institute of Technology 2013年第3期22卷 350-353页

作者：张万君吴晓颖张晓炜牛敏杰冷雪冰 Department of Arms Engineering Academy of Armored Force Engineering Baicheng Ordnance Test Center

To measure projectile attitude in space flight, based on continuous wave （CW） radar, a new micro-doppler effect testing technique is developed in this paper. It also establishes radar testing model for attitude of flying projectile and resolve micro-doppler effect of projectile motion attitude. By distinguishing and geting attitude parameters such as micro-motion period, this technique can in- tuitively estimate the flight stability of projectile, and the validity of this technique is proved accord- ing to flight tests.

关键词： attitude of projectile micro-doppler radar testing target micro-motion

micro-doppler Parameter Estimation Method Based on Compressed Sensing

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Journal of Beijing Institute of Technology 2019年第2期28卷 286-295页

作者： Jiayun Chang Xiongjun Fu Wen Jiang Min Xie School of Information and Electronics Beijing Institute of Technology

A micro-doppler parameter estimation method based on compressed sensing theory is proposed in this *** micro-doppler parameter estimation algorithm was improved for micro-motion targets with translation in this *** ideal micro-doppler parameter estimation results were *** proposed micro-doppler parameter estimation was compared with the traditional micro-doppler parameter estimation *** for return signal length were analyzed with this new algorithm and its performance was also analyzed in various environments with different SNR.

关键词： feature extraction compressed sensing micro-doppler parameter estimation

Modeling simulation and experiment of micro-doppler signature of precession

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Journal of Systems Engineering and Electronics 2010年第4期21卷 544-549页

作者： Hongwei Gao Lianggui Xie Shuliang Wen Beijing Institute of Radio Measurement Beijing 100039 R R. China China Aerospace Science & Industry Corporation Beijing 100048 P. R. China

Spatial precession is a special micro-motion of the spinning-directional target, and the micro-doppler signature of the cone-shaped target with precession is studied. The micro-motion model of precession is built first, and then the micro-doppler model is developed based on the proposed concept of micro-motion ma- trix, by which the theoretical formula of micro-doppler signature of precession is derived. In order to further approach to the actual case, the occlusion effect is firstly considered in micro-doppler, and the simulated result with occlusion effect is well in accordance with the measured result in microwave anechoic chamber, which suggests that the micro-motion model and micro-doppler model of precession are both valid.

关键词： precession micro-doppler micro-motion matrix occlusion effect.

Multiple walking human recognition based on radar micro-doppler signatures

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Science China(Information Sciences) 2015年第12期58卷 177-189页

作者： SUN ZhongSheng WANG Jun ZHANG YaoTian SUN JinPing YUAN ChangShun BI YanXian School of Electronic and Information Engineering Beihang University

The recognition of human movements based on radar m-D(micro-doppler) signatures attracts great interest in the field of radar research on automatic target recognition. Because there are multiple frequency components overlapping seriously in the radar echoes from walking humans, it is a very difficult work to recognize walking humans based on radar echoes. In this paper, a recognition method of walking humans based on radar m-D signatures is proposed. In this method, the m-D spectrum is generated by generalized S transform first,and then the entropy segmentation is used to segment the interesting region from the original spectrum. Next,the m-D features are extracted from the m-D region. Lastly, the support vector machine is used to recognize different walking human targets. The simulation experiments considering two factors of height and velocity are also conducted to test the performance of this proposed method.

关键词： radar micro-doppler walking human generalized S transform recognition

Parity recognition of blade number and manoeuvre intention classification algorithm of rotor target based on micro-doppler features using CNN

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Journal of Systems Engineering and Electronics 2020年第5期31卷 884-889页

作者： WANG Wantian TANG Ziyue CHEN Yichang SUN Yongjian Department of Early Warning Technology Air Force Early Warning AcademyWuhan 430019China

This paper proposes a parity recognition of blade number and manoeuvre intention classification algorithm of rotor target based on the convolutional neural network(CNN) using micro doppler features. Firstly, the time-frequency spectrograms are acquired from the radar echo by the short-time Fourier ***, based on the obtained spectrograms, a seven-layer CNN architecture is built to recognize the blade-number parity and classify the manoeuvre intention of the rotor target. The constructed architecture contains a leaky rectified linear unit and a dropout layer to accelerate the convergence of the architecture and avoid over-fitting. Finally, the spectrograms of the datasets are divided into three different ratios, i.e., 20%, 33% and 50%,and the cross validation is used to verify the effectiveness of the constructed CNN architecture. Simulation results show that, on the one hand, as the ratio of training data increases, the recognition accuracy of parity and manoeuvre intention is improved at the same signal-to-noise ratio(SNR);on the other hand, the proposed algorithm also has a strong robustness: the accuracy can still reach 90.72% with an SNR of – 6 dB.

关键词： micro-doppler convolutional neural network(CNN) parity recognition of blade number manoeuvre intention classification

Multiple walking human recognition based on radar micro-doppler signatures

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Science China Chemistry 2015年第12期58卷 173-185页

作者： SUN ZhongSheng WANG Jun ZHANG YaoTian SUN JinPing YUAN ChangShun BI YanXian School of Electronic and Information Engineering Beihang University

关键词： radar micro-doppler walking human generalized S transform recognition

micro-doppler Simulation Modeling and Analysis of the Ship

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Micro-Doppler Simulation Modeling and Analysis of the Ship

Convex Optimization-Based Rotation Parameter Estimation Using micro-doppler

2011 3rd International Conference on Signal Processing Systems(ICSPS 2011)

作者： Huang Mengjun Fu Qiang School of Electronic Science and Engineering National University of Defense Technology

Ship have angular motions such as yaw, pitch and roll. It may induce additional frequency modulations on the returned radar signal, called the micro-doppler effect. This paper describes the techniques used to simulate... 详细信息

ISBN: (纸本)9781457701726

关键词： Ship motion Response operators micro-doppler Sea condition

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Journal of Electrical Engineering 2016年第4期4卷 157-164页

作者： Kyungwoo Yoo Joohwan Chun Seungoh Yoo Chungho Ryu Department of Electrical Engineering Korea Advanced Institute of Science and Technology Daejeon Republic of Korea 8th R&D Institute Agency for Defense Development Republic of Korea

We present a novel algorithm that can determine rotation-related parameters of a target using FMCW （frequency modulated continuous wave） radars, not utilizing inertia information of the target. More specifically, the proposed algorithm estimates the angular velocity vector of a target as a function of time, as well as the distances of scattering points in the wing tip from the rotation axis, just by analyzing doppler spectrograms obtained from three or more radars. The obtained parameter values will be useful to classify targets such as hostile warheads or missiles for real-time operation, or to analyze the trajectory of targets under test for the instrumentation radar operation. The proposed algorithm is based on the convex optimization to obtain the rotation-related parameters. The performance of the proposed algorithm is assessed through Monte Carlo simulations. Estimation performance of the proposed algorithm depends on the target and radar geometry and improves as the number of iterations of the convex optimization steps increases.

关键词： micro-doppler FMCW radar STFT (short-time Fourier transform) convex optimization rotation parameter.