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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。
The pseudo-code ranging system commonly used in the current measurement and control system has the problem of distance blurring and synchronization capture, and the performance requirements of the two are contradictory. Based on the characteristics of aperiodic, self-synchronizing and good auto-correlation of chaotic signals, a method of applying continuous chaotic signals as ranging signals to space measurement and control system is proposed. The feasibility of engineering application is analyzed and simulated. Out of the way to improve related performance. The advantage of chaos ranging compared to pseudo-code ranging is that the synchronization of chaos can automatically realize the synchronization of ranging signals and omit the acquisition of ranging signals. The aperiodicity of chaos eliminates the ambiguity of distance. The application of continuous chaos signal in the measurement and control system is feasible and advantageous.