摘要
由于混沌基函数的非周期性,混沌调制系统的理论性能分析一直是个难题。本文基于离散混沌映射,视混沌信号为随机变量,推导出混沌COOK相干以及非相干解调系统的误码率计算式,并得到了仿真实验的验证。理论和仿真实验结果表明,COOK相干解调系统在理想情况下误码性能能够达到其上限,即与相干解调FSK系统相同。非相干解调系统的性能较差。
It is difficult to calculate the error performance of chaotic on-off keying communication system because of the non-periodicity of chaotic basis function. Based on discrete chaotic mapping, This paper treats the chaotic signals as random variables and gives the error performance expression theoretically, which is verified by the simulation results. Both the theoretical and simulated results show that the error performance can reach the upper bound under the ideal condition, which is equal to the conventional coherent FSK system, but the non-coherent demodulation system is much worse than coherent demodulation system.
出处
《电路与系统学报》
CSCD
2003年第4期30-33,共4页
Journal of Circuits and Systems
基金
国家教育部高校博士点基金资助项目(00056107)
关键词
COOK
相干解调
误码性能
Chaos On-off Keying
coherent demodulation
error performance
