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| Equivalent Simulation Method for Pulse Radar ISAR Imaging in Radio Frequency Simulation |
| LIU Xiaobin① LIU Jin① LIU Guangjun② ZHAO Feng① WANG Guoyu① |
①(State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, National University of Defense Technology, Changsha 410073, China)
②(Equipment Information Management Center, Equipment Development Department of People,s Republic of China Central Military Commission, Beijing 100034, China) |
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Abstract Pulse radar signal is widely used in Inverse Synthetic Aperture Radar (ISAR) imaging. However, because the propagation distance obtained by the pulse width is larger than the size of anechoic chamber, target echo returns before the pulse signal is fully transmitted. As a result, the transmitted and reflected signals are coupled and difficult to be separated for ISAR imaging in Radio Frequency Simulation (RFS). To solve this problem, the equivalent simulation method is proposed for pulse radar ISAR imaging based on Interrupted Transmitting and Receiving (ITR). As the ITR echo is piecewise sparse in time domain, the ISAR image can be reconstructed based on Compressive Sensing (CS). Simulation and real data demonstrate that the ISAR image obtained by the proposed method is consistent with that obtained by the complete pulse radar signal. Therefore, the proposed method is effective for ISAR imaging in RFS.
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Received: 09 October 2017
Published: 24 April 2018
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| Fund:The National Natural Science Foundation of China (61101180, 61401491, 61490692) |
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Corresponding Authors:
LIU Jin
E-mail: liujin0624@gmail.com
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