摘要
在对保密通信的性能要求不断提高的情况下,将具有更复杂动力学行为的超混沌应用到FM-DCSK系统中.分别在AWGN信道、多径Rayleigh信道、多径Ricean信道的条件下,通过理论分析和Matlab数值仿真,用误码率(BER)与信噪比(SNR)的关系阐释了超混沌FM-DCSK调制系统的性能.实验结果表明,超混沌FM-DC-SK系统具有比低维的混沌FM-DCSK系统更为优良的保密性能和较好的抗干扰能力.
To accommodate the daily increasing requirements of secure performance of communications, this paper applies hyperchaos into FM-DCSK system which can deal with more complicated dynamic behaviors. The perform- ance is characterized by the relationship between bit error rate （BER） and SNR through theoretical analysis and Matlab numerical simulation under the conditions of AWGN channel, multi-path Rayleigh channel and multi-path Ricean channel. The results show that the hyperchaotic FM-DCSK communication system has better secure perform- ance and anti-interference ability than lower dimensional chaotic FM-DCSK system.
出处
《应用科技》
CAS
2008年第1期16-20,共5页
Applied Science and Technology
基金
哈尔滨工程大学基础研究培育基金资助项目(HEUFP05024)
