【摘要】 使用混沌振子检测微弱信号时,只要把含有已知频率的待测信号加入一个对应于此频率的、处于混沌临界状态的混沌系统中,该混沌系统的动力学行为就会发生很大变化,以此来判断微弱信号的存在。往往输入信号和噪声同时作用于混沌系统,这就要求噪声不能引起混沌系统状态的改变。在此基础上,重点从理论和数值仿真分析了噪声对混沌振子系统状态的影响。并提出了基于自相关方法和混沌系统相结合检测微弱信号的新方法。更多还原

【Abstract】 When using the chaotic oscillator in weak signal detection,as long as the containing known frequency of the signal to the frequency in the chaotic critical state of chaotic system,dynamical behavior of the chaotic system will have great changes.Often the input signal and noise are simultaneously acting on the chaotic system,which requires that the noise can not cause chaos system state changes.For this reason,the influence of noise on the chaotic oscillator system is analyzed by theoretical and numerical simulation.It propose a new method based on auto correlation method and chaotic system to detect weak signal.更多还原