【作者】 毕红博；

【导师】 尹成群； 黄怡然；

【作者基本信息】 华北电力大学（河北） ， 信号与信息处理， 2008， 硕士

【摘要】 本论文在对Duffing混沌振子微弱信号检测方法进行研究的基础上,根据2FSK信号和2PSK信号的特点,提出了一种2FSK、2PSK信号的检测的新方法。通过仿真实现了混沌振子对2FSK、2PSK微弱信号的检测,运用大量图表说明了参数对系统特性的影响,并给出了该方法的最低信号检测门限。研究了混沌振子参数及2FSK信号参数对误码率性能的影响,通过大量仿真实验说明了该方法具有较强的抗干扰性。并将该方法与传统解调方法进行了对比,研究结果表明该方法对2FSK、2PSK微弱信号的检测具有明显的优势。更多还原

【Abstract】 According to the characteristics of 2FSK signal and 2PSK signal, a new method based on weak signal detection by Duffing chaotic oscillator to detect 2FSK signal and 2PSK signal is presented. 2FSK and 2PSK weak signal detection using chaotic oscillator is realized by simulation. The influence of the parameters on the system character is demonstrated by the large of charts and tables, and the minimum detection threshold of the proposed method is given. The effect of the parameters of chaotic oscillator and 2FSK signal on symbol error rate is studied; the simulation experimental results show that the chaotic oscillator method has strong anti-jamming. At last, the comparison between chaotic oscillator method and traditional demodulation method is given; the research makes known that the chaotic oscillator method has obvious advantage in 2FSK and 2PSK weak signal detection.更多还原