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Study on Methods and Applications of Target Recognition in Wideband High Resolution Radar Seeker under Different Angle Measurement Methods

Author: ZhangXuDong
Tutor: ZhuangZuoWen；GuoGuiRong
School: People's Liberation Army National Defense University of Science and Technology
Course: Information and Communication Engineering
Keywords: High-resolution Scattering centers Cyclostationary Motion Parameter Estimation Angle glint Nonlinear Kalman filter Radar Target Recognition Three-dimensional imaging Data acquisition .
CLC: TN957.51
Type: PhD thesis
Year: 2001
Downloads: 590
Quote: 3
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Abstract


In this thesis, the distance-dimensional high-resolution stable imaging conical scanning angle measurement system, flashing angle conical scanning angle measurement system suppression, single pulse angle measurement system target recognition issue. In the first chapter introduces the research background and theoretical methods. First introduces the development status of the anti-tank precision-guided weapons, and then analyzes the research and development of high-resolution imaging information processing, briefly introduced the the clutter background processing and corner flashing Finally, the main content of this study. The second chapter analyzes the the target distance like step frequency high-resolution system. Movement condition dimensional high-resolution imaging of the target distance, for the low SNR environment cyclostationary methods to estimate the motion parameters. Simulation experiments, the experiments show that Gaussian colored noise cyclostationary processing more accurate estimate of the target speed and acceleration to reduce the impact of the movement, better imaging results. Conical scanning angle measurement system-dimensional imaging of the target distance, using environment for low signal-to-noise ratio, the same the cyclostationary estimate conical scanning signal modulation. Simulation results show that colored Gaussian noise background, better imaging effect in reducing the impact of the goniometer. In Chapter the angle flashing formation mechanism, the main theoretical models and processing methods. Angle measurement value flashing suppress the conical scanning angle measurement system based on distance high-resolution angle method using distance-dimensional high-resolution image, extract the reflected signal components of the strong scattering centers, estimated on the basis of the strong scattering centers, using the average ways to reduce the angle flashing goniometer. In the average inhibit angle flashing on the basis of using the approximate spherical coordinates nonlinear Kalman filtering method to trace further inhibit angle flashing. The fourth chapter analyzes the problems faced by the traditional high-resolution imaging target recognition. Analysis of a single pulse and distance-dimensional high-resolution imaging combine to give three-dimensional image, compared the use of single distance like multiple distance like the imaging effect; based on target identification, analysis of the use of single-pulse three-dimensional like facing problems; in order to improve the effect of the recognition under the conditions of low radial resolution COMPREHENSIVE scattering center angle information and amplitude information, using quadrature method and the multiple distance image matching method for target identification. The experiment shows that these two methods relative to using only the distance as the information recognition method has better effect. Chapter one for three institutional multi-channel acquisition system, data acquisition for target recognition system. Chapter VI summarizes the research work, pointed out the need to further address the problem.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radar > Radar equipment,radar > Radar receiving equipment > Radar signal detection and processing
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