一种利用混沌同步的测控系统测距方法

当前测控系统普遍采用的伪码测距体制中存在距离模糊问题和同步捕获问题，并且两者的性能要求是矛盾的。利用混沌信号的非周期、自同步和良好自相关特性，提出了将连续混沌信号作为测距信号应用于航天测控系统的方法，分析了该体制的工程应用可行性，并进行了仿真试验，给出了改进相关性能的方法。混沌测距方法相对于伪码测距的优势在于，混沌的同步特性能够自动实现测距信号的同步，省略了测距信号的捕获过程；混沌的非周期性消除了距离模糊。连续混沌信号在测控系统中的应用是可行且有优势的。

A ranging method based on synchronization of continuous chaos signals in TT&C systems

The shortcomings of the pseudo code telemetry,tracking and command(TT&C) is discussed. There are range ambiguity and synchronization acquisition problems in pseudo code TT&C. The idea of applying continuous chaos signal to aerospace TT&C is proposed,moreover,the theoretical scheme is established and the merits of the proposed method are pointed out. Driven by the transmitted signal,the receiving terminal is automatically synchronized with the transmitting terminal with omitting the phase searching and acquiring progress in the pseudo-random code ranging. The aperiodicity of chaos signal solves the ambiguity problem in the pseudo-random code ranging. The analysis results show that the application of continuous chaos signal in TT&C systems is feasible and advantageous.