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The Study of Ground Moving Target Detection with Synthetic Aperture Radar

Author: ZhengChunMing
Tutor: ShenTing
School: Institute of Electronics
Course: Communication and Information System
Keywords: Synthetic Aperture Radar Moving Target Detection Along-track interferometry (ATI) Phase center antenna (DPCA) Space-time adaptive processing (STAP)
CLC: TN958
Type: Master's thesis
Year: 2007
Downloads: 308
Quote: 2
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Abstract


Synthetic aperture radar ground moving target detection on both the military and civilian very important role. At present, many countries in the field to carry out extensive research efforts to explore more efficient and practical testing methods and the development of more advanced moving target detection system. In this paper the analysis of domestic and international SAR Moving Target Detection technology, based on in-depth study of the ground moving target detection, the main methods and focus on the ATI method. Meanwhile, the paper puts forward some new approaches and innovative solution to the ATI ground moving target some of the key issues to make it more efficient and practical. This work and innovations include: 1) analysis of the moving target echo signal model, in-depth analysis of the moving target Doppler center frequency and modulation frequency on the impact of moving target imaging, and the results of the analysis of the simulation. 2) analysis of the current moving target detection several main methods, including single moving target detection method, ATI, DPCA and STAP methods, in-depth analysis of the basic principles of these methods and some of the key issues in the detection performance of these methods, can be realized and equipment complexity and other aspects were compared. 3) a detailed analysis of ATI, the detection performance of the detection performance affecting ATI antenna work, phase unwrapping, image registration and phase noise reduction and other key issues were analyzed. Frequency-domain binding assay method and dual ATI advantages ATI proposed a dual-channel phase unwrapping method, which does not require ground control target, the required equipment complexity is not high, so the ratio of the conventional two-channel phase ATI unwrapping method more practical. This method can also be applied to dual channel DPCA the method. 4) analysis of the target detection basic principles of the traditional two-channel ATI single threshold detection method lack of analysis of the use of dual-threshold for moving target detection principle and method, and proposes a means of complex correlation coefficient and interferometric phase two thresholds for moving target detection. This paper presents a theoretical derivation of the method and algorithm flow, analyzing the advantages and disadvantages of the algorithm, simulation results show that the method can detect a certain probability, effectively reducing the ATI moving target detection false alarm rate. 5) depth study of ATI-based multi-channel moving target detection technology, according to a multi-channel phase information rich ATI system characteristics, we propose a multi-channel ATI moving target detection method for multiple channels first phase values fitting a straight line, then the slope of the fitted straight line and fitting of residuals and (the absolute value of the residuals of fitting a straight line and) together moving target detection. Simulation results show that this method can effectively improve the detection performance of ATI.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radar > Radar: institutional sub-
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