Airborne Bistatic Sar Analysis And Simulation Of The Synchronization Error

Bistatic Synthetic Aperture Radar (Bistatic SAR) system is a newly developed imaging radar system in which the receiver and the transmitter are installed on two platforms with different spatial positions and motion vectors. In recent years, Bistatic SAR has become a hotspot in the international research field due to peculiar advantages such as long operating distance, high security, anti-attacking capability etc.In Bistatic SAR system, various synchronization errors introduce phase errors, these problems, which make the imaging more difficult than that of Monostatic SAR system occur because of the seperation of its transmitter platform and receiver platform.1. The geometrical and signal models are built under arbitrary flying-mode. Based on these studies, the characteristics of Doppler are analyzed. It is concluded in this dissertation that the eligible Bi-SAR signal processing is coupled with the flying-mode.2. Then the dissertation gives particularly empathies on the spatial geometrical layout of Bi-SAR, in the case of different spatial location, different fly track and different velocity. The characters of the layouts were analyzed. The RD algorithm of Bi-SAR in CT broadside side-looking mode is discussed in detail. From the classical two- order range model approximation, the Doppler parameter and range migration are derived, the Simulation results have validated the feasibility of the RD algorithm.3. The sources of variant synchronization errors are discussed, the analysis of echo phase effected by variant errors is given. Imaging degradation caused by variant synchronization errors is also discussed. In this dissertation RD algorithm is used for processing the echo with variant synchronization errors. Through simulation, it provides the reference for the design of synchronization system and compensation research.4. The compensation for PRF time linear error is given with the simulation result presented.5. Two primary synchronization solutions are drafted, and provide the reference for the real synchronization system design.