摘要：For further exploring the confidentiality of optical communication,exponential synchronization for the delayed nonlinear Schrodinger equation is *** is possible for time-delay systems to generate multiple positive Lyapunov exponents without the limitation of system ***,the homoclinic orbit analysis is carried out by using the bifurcation theory,and it is found that there are two homoclinic orbits in the *** to the corresponding relationship,solitary waves also exist in the ***,the Melnikov method is used to prove that homoclinic orbits can evolve into chaos under arbitrary perturbations,and then chaotic signals are used as the carriers of information *** Lyapunov exponent spectrum,phase diagram and time series of the system also prove the existence of ***,an exponential synchronization controller is designed to achieve the chaotic synchronization between the driving system and the response system,and it is proved by the Lyapunov stability ***,the error system is simulated by using MATLAB,and it is found that the error tends to zero in a very short *** simulation results demonstrate that the proposed exponential synchronization scheme can effectively guarantee the chaotic synchronization within 1 s.

摘要：首先简述了"干涉车轮"(Cartwheel)干涉SAR星座计划的基本情况,继而针对德国X频段陆地合成孔径雷达-附加数字高程测量(TanDEM-X)编队干涉SAR系统的性能指标要求、工作模式、系统实现、在轨运行应用情况进行了介绍。重点针对TanDEM-X的基线测量、星间同步和自主编队控制3项关键技术采取的技术途径和达到的性能指标进行了深入调研分析,并针对其中值得改进的时间同步方法提出了具体的改进措施,最后,从系统总体设计和关键技术两方面归纳了对其他类似系统研制的启示。