宽带混沌信号的产生与同步

宽带混沌信号拥有良好的相关特性、低截获概率和高保密性等优点,但其产生和同步比较困难.利用驱动响应的思想,使用离散Chebyshev映射混沌序列驱动2级级联Colpitts振荡连续混沌系统的方法产生宽带混沌信号,其电路结构简单,所得信号频谱平坦宽阔,达到数百兆赫兹.由于数字信号可以进行精确延迟,该混沌电路可以实现同步,并且在电路元件参数值和动态元件初始储能不匹配时,具有一定的鲁棒性,所以该电路可靠性和实用性较高,在通信或雷达中具有很好的应用前景.

Generation and Synchronization of Chaotic Wideband Signal

Chaotic wideband signal has many advantages such as good correlation,low probability of detection and high security.But its generation and synchronization is difficult.By using driving-responding idea,the continuous three Colpitts circuits in series driven by discrete chaotic Chebyshev map can obtain the wideband chaotic signals,in which the circuits are simple,the spectral of signals is flat and broad with hundreds MHz.Because digital signal can be delayed exactly,chaotic circuit can realize synchronization and be robust when component's parameter value and original energy in the circuits are mismatching.With its high reliability and practicability,the scheme will have good prospects in radar and communication systems.