摘要
提出一种慢跳频系统中基于差分空时调制的混沌保密通信方法。此方案集成了差分空时编码和混沌跳频扩频技术的优点。一方面,在跳频系统中,使用混沌序列代替伪随机(PN)码,增强了抗截获和抗预测的性能;另一方面,通过差分空时调制产生分集增益,降低了多径衰落效应的影响。仿真结果证实了此方案的有效性。
A novel scheme of differential space time modulation for chaotic slow frequency hopping （FH） system is proposed. This scheme integrates the strength of differential space time coding and chaotic FH spread spectrum technology. It is highly immune to interception and prediction by generating chaotic Sequence as pseudo -noise （PN） code in a frequency hopping system. Meanwhile, it can mitigate the mul- tipath fading effects through obtaining the diversity gain. Simulation results of the bit error rate （BER） demonstrate the effectiveness of this method.
出处
《电讯技术》
2008年第8期1-5,共5页
Telecommunication Engineering
基金
国家自然科学基金资助项目(60502011)
军工项目(JG2007039)
中国博士后科学基金资助项目(20060401021)
关键词
保密通信
跳频通信
差分空时调制
混沌
secure communication
frequency hopping communication
differential space time modulation
chaos
