基于脉冲同步的混沌雷达信号延迟方法  

Impulsive Synchronization-Based Method for Delaying Chaotic Radar Signals

作　　者：蒋飞[1] 刘中[1] 

机构地区：[1]南京理工大学电子工程系,南京210094

出　　处：《宇航学报》2007年第2期484-488,共5页Journal of Astronautics

摘　　要：提出一种基于脉冲同步技术的混沌雷达信号延迟方法。该方法首先对混沌信号进行滤波;然后对滤波输出进行采样量化,采用数字技术延迟实现量化的信号;最后通过脉冲同步系统来恢复原信号,实现混沌信号的延迟。文章给出了方法的系统实现结构,并发展了一个新的脉冲同步方法。通过计算最大条件Lyapunov指数,研究了滤波器带宽和最小采样频率之间的关系并讨论了采样和量化对系统性能的影响。仿真结果表明本文方法的有效性。An impulsive synchronization-based method to delay chaotic radar signals is presented in this paper. The method firstly filters the chaotic signals through a filter, then the filter output is sampled and delayed in digital way, and finally the delayed chaotic signals are recovered by impulsive synchronization techniques. An implementation structure is proposed and a new synchronization method is developed. By computing maximum Lyapunov exponent, this paper studies the relationship between filter bandwidth and sampling frequency. The effect of sampling and quantization on the system performance is also discussed. Computer sim- ulations show that the proposed method can delay the broadband chaotic signals.

关 键 词：延迟 脉冲同步 条件Lyapunov指数 混沌雷达 滤波 

分 类 号：TN955[电子电信—信号与信息处理]