非理想干扰对消条件下扰中侦系统性能分析与功率优化

Performance analysis and power optimization for simultaneous jammingand intercepting system with imperfect interference cancellation

为了定量描述干扰对消性能对扰中侦系统的影响,提出了非理想干扰对消条件下干扰-侦察中断概率的概念,推导了干扰-侦察中断概率性能闭式表达式,并进一步给出了理想干扰对消情况下的渐进中断概率表达式。基于所推导性能闭式表达式,求得了使干扰-侦察中断概率最小化的最优干扰功率。利用蒙特卡罗仿真验证了推导结果的准确性和最优功率的正确性。结果表明,干扰-侦察中断概率随着干扰对消比增大而减小,但随着干扰功率和发射功率的增大先减小后增大;最优干扰功率随着发射功率的增大而逐步增大,但最优干扰-侦察中断概率性能随着发射功率的增大而趋于常数。

In order to describe the effects of interference cancellation performance on the simultaneous jamming and intercepting system quantitatively,the concept of jamming-intercepting outage probability with imperfect interference cancellation was proposed,the closed-form expression for jamming-intercepting outage probability was derived and the asymptotical expression was further obtained for ideal interference cancellation.Based on the derived performance closed-form expression,the optimal jamming power that minimizes the jamming-intercepting outage probability was identified.Accuracy of the analytical results and the correctness of optimal jamming power were justified through Monte-Carlo simulations.The results demonstrate that the jamming-intercepting outage probability decreases as the interference cancellation rate increases,decreases first and then increases as the jamming power and the transmit power increases,and the optimal jamming power increases as the transmit power increases,while the optimal jamming-intercepting outage probability converges to constant as the transmit power increases.