| Bistatic Synthetic Aperture Radar(BiSAR) is a newly SAR system that operates with separated transmitter and receiver on different platforms. This system has several advantages like obtain rich information, security and anti-jamy compared to normal SAR. It will play a significant role in military as well as civil applications in the future.The general BiSAR is introduced firstly, the geometry and signal models of BiSAR are built. The properties of Doppler,resolutions and Radar Equation are analyzed. The conclusion,the digital processing of Bistatic SAR is related to the geometry models. The thesis place special emphases on researching Non-Cooperate Space-Ground BiSAR, include the geometry and signal models, the properties of Doppler, resolutions and the character of the irradiation-band.The imaging algorithm of Bistatic SAR is studied deeply. The RD algorithm and BP algorithm that fit for the model of Non-Cooperate Bistatic SAR are given. In order to validate the validity and applicability of algorithms in the model, the echo data of point target and scene target are processed by two algorithms respectively. Imaging quality and computation load of two algorithms are compared at last.Phase errors are given first, and then theoretical analysis,simulation result show influence caused by several kinds of typical phase errors. In order to validate the validity and applicability of algorithms in the Non-Cooperate model, the echo data with errors is estimated by algorithms respectively.The influence for image caused by Synchronic Error has been discussed and studied. The influence is simulated by the error of irradiation synchronization, time synchronization and frequency synchronization.A Receiver system fit for receiving Space-Ground BiSAR echo signal is introduced. Principle and components are given. Result of lab experiment is presented. The echo received by receiver is processed elementarily, the result proved the correctness of the echoed data and the receiver system can work well. |
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