改进型混沌脉冲位置调制系统性能分析  

Performance Analysis of Modified Chaotic Pulse Position Modulation

作　　者：侯秀波[1] 张兴周[2] 刘海超[1] 

机构地区：[1]中国人民解放军96274部队,洛阳471002 [2]哈尔滨工程大学信息与通信工程学院,黑龙江150001

出　　处：《系统仿真学报》2009年第2期482-484,共3页Journal of System Simulation

基　　金：哈尔滨工程大学基础研究培育项目(HEUFP05024)

摘　　要：针对混沌脉冲位置调制机制中误差传播的不足,提出了将延迟环节移出了反馈环,消除了信息序列对混沌系统动态性能的影响,提高了系统的可实用性,可靠性。在信道噪声和滤波器存在的条件下,通过Simulink仿真和Matlab数值分析,根据误码率(BER)与信噪比(Eb/N0)的关系阐释了改进型混沌脉冲位置调制系统的性能。实验结果表明了这种方法的优越性。Based on the disadvantage of chaotic pulse position modulation （CPPM） scheme caused by error propagation, a novel communication strategy was introduced. The modified CPPM scheme got the delay part out of the feedback loop and then removed the influence of information sequence on the dynamic properties of chaos. The proposed scheme increased the practicability and reliability of this system. The performance of this modified CPPM scheme was characterized in terms of bit error rate （BER） versus the ratio of the signal energy per bit to the noise spectral density （Eb/N0） by Simulink simulation and Matlab numerical analysis in the presence of channel noise and filter. The results show that the modified CPPM has better performance than the conversional modulation scheme.

关 键 词：混沌脉冲位置调制(CPPM) 混沌 SIMULINK 保密通信 

分 类 号：TN914.2[电子电信—通信与信息系统]