In the other two schemes, the synchronizing signal is obtained by sampling and is filtered by a low_pass filter only on the bond of the chaotic attractor, instead of periodic sampling.

• 提出了3种脉冲式混沌同步的新方案，并给出了仿真结果．在第一种方案中，同步信号是通过周期抽样和滤波得到的；