针对盲分离接收的干扰技术研究

Research on Jamming Technology of Blind Signal Separation Receiving

为了应对盲分离接收技术给实施通信干扰带来的困难,设计了一种多时延干扰信号。首先给出了接收信号模型,然后研究信号分离条件,从调制域出发研究了时延差与码元周期的关系对信号分离性的影响,得出了通信信号与干扰信号的不可分准则,根据该准则选择恰当的延时时间,用多抽头延时线的方式生成干扰信号。仿真结果表明,对常用的JADE和viterbi分离算法,多时延干扰信号起到了抗分离的作用。

A multi-time delay jamming signal was designed to deal with the difficulties brought by blind signal separation receiving.Firstly,model of the received signal was given,then the conditions of signal separation were studied.The rela-tionship between delay differential and element cycle which would influence signal separation was studied from the modulation domain.From the analysis above,the inseparable rule between communication signal and jamming signal was given. Based on this rule,the appropriate delay time was chosen and the jamming signal was generated by several tapped delay lines.Simulation results show that multi-time delay jamming signal can work well anti-separation on JADE algorithm and viterbi algorithm.