基于双混沌系统的非线性调频雷达信号及其特性分析  

The nonlinear FM radar signal based on dual-chaotic system and the analysis of its ambiguity characteristics

作　　者：刘诗华[1] 王德石[1] 

机构地区：[1]海军工程大学兵器工程系,湖北武汉430033

出　　处：《雷达与对抗》2008年第2期45-48,55,共5页Radar & ECM

基　　金：国家自然科学基金(No.10272113)

摘　　要：提出了两种双混沌系统的构成方案,通过双混沌系统生成了双混沌信号序列,在此基础之上,利用双混沌信号对正弦波进行调频。双混沌调频(FM)信号具有良好的自相关特性,同时使雷达波形难以辨识。用宽带模糊度函数统计平均方法研究了信号的模糊特性,并对信号的抗干扰性能进行了分析。仿真结果表明,双混沌调频信号具有极佳的距离和速度分辨率,抗干扰能力较强,是一种理想的信号形式。Two ways of forming the, dual-chaotic system are presented. The dual-chaotic signal sequences are generated by these dual-chaotic systems. The dual-chaotic signals are used to modulate the sine waves. The dual-chaotic FM signals have ideal auto-correlation property and the waveform is very hard to be recognized. The ambiguity characteristics of the signals are studied through the statistic average of the wideband ambiguity function, and the anti-jamming performance of the signals is analyzed The simulation result shows that the dual-chaotic FM signals have higher resolutions in both domains of range and velocity, and the signals have good anti-jamming performance, which makes an ideal signal form.

关 键 词：雷达 双混沌系统 非线性调频 模糊函数 

分 类 号：TP957.51[自动化与计算机技术]