摘要
DS/FH通信系统因具有良好的保密性而受到广泛关注,虽然DS/FH通信系统自身具有很强的抗干扰能力,但由于敌方的恶意干扰,其系统性能会急剧下降。为此,提出一种适合于强干扰应用环境的基于变换域的自适应门限智能干扰抑制算法。算法利用信号处理技术实现干扰信号的智能检测、识别及干扰抑制。仿真结果表明,采用基于变换域的自适应门限智能干扰抑制技术极大地抑制了外界干扰对传输信号的影响,有效地降低了系统误码率。
The high security and strong anti-interference capability of DS/FH hybrid spread spectrum technology determine its important role in satellite communication systems.Although the DS/FH communication system has strong anti-jamming ability,the processing gain of the system can＇ t be arbitrarily increased which is restricted by the spectrum resource.When the external interference exceeds the jamming margin of the system,the performance will reduce sharply.Therefore,a new method of adaptive threshold interference suppression based on transform domain is proposed,which uses the signal processing technology to realize the intelligent detection,identification and interference suppression.The simulation results show that this algorithm can effectively suppress the external interference and reduce the bit error rate in DS/FH communication system.
出处
《遥测遥控》
2014年第4期47-52,64,共7页
Journal of Telemetry,Tracking and Command
关键词
DS
FH系统
干扰模型
智能干扰抑制
误码率
DS/FH system
Interference model
Intelligent interference suppression
Bit error rate
