一种基于变换域通信系统的卫星隐蔽通信系统  

Satellite Covert Communication System Based on the Transform Domain Communication System

作　　者：谢铁城[1,2] 达新宇[1] 褚振勇[1] 高伟刚 

机构地区：[1]空军工程大学信息与导航学院 [2]94900部队

出　　处：《信息与控制》2014年第5期524-528,共5页Information and Control

基　　金：国家自然科学基金资助项目(60972042;61271250;61202490)

摘　　要：提出了一种采用变换域通信系统(TDCS)技术实现的重叠于卫星通信链路上的隐蔽通信系统,该系统将隐蔽信号叠加在卫星通信系统原业务信号上,通过透明转发器进行隐蔽通信.首先分析了隐蔽通信系统的收发过程,建立了系统的信息隐藏模型,根据信息隐藏的安全信息隐藏范式定义了重叠隐蔽通信的安全性,最后对系统的通信能力与安全性进行了仿真分析.仿真结果表明:TDCS具有良好的抗干扰能力,即使干信比达15 d B,当信噪比为-13 d B时依然能使系统误码率控制在10-4左右,相比较于采用直扩实现,TDCS更适合于信号重叠的隐蔽通信系统.隐蔽信号叠加之后对于原系统的数据接收几乎未造成影响,可认为重叠的隐蔽系统是安全的.A covert communication system based on the transform domain communication system （TDCS） is proposed. The covert signal is superimposed on the original satellite communication signal and a transparent transponder is used for covert comraunication. First, the systen＇s transmitting and receiving processes are an- alyzed, and the information hiding model is established. Based on this secure paradigm of information hiding, the security of the overlay covert communication is defined. Finally, the capabilities and the security of the system are simulated and analyzed. The simulation results show that TDCS has excellent anti-jamming ability. The bit error rate（BER） of the system is about 10 -4, even when the jamming-to-signal ratio is 15 dB and the signal-to-noise ratio is - 13 dB. TDCS is more suitable for the overlap covert communication system compared with the direct sequence spectrum spreading. The overlapped covert signal has little effect on the data received by the original system, and sothe overlap covert communication system can be considered to be secure.

关 键 词：变换域通信系统 卫星通信链路 透明转发器 重叠隐蔽通信 

分 类 号：TN914.42[电子电信—通信与信息系统]