转发式干扰条件下FFH/2FSK通信链路性能分析

Performance analysis of FFH/2FSK communication link with repeater jamming

针对FFH/2FSK通信链路受转发式干扰影响较大的问题,首先对转发式干扰条件下FFH/2FSK通信链路的误比特性能进行了分析,推导出了在2FSK调制下的转发式干扰误比特率公式;然后分别从信噪比、信干比、转发时延和载波频率等方面研究了转发式干扰的干扰效果.仿真的误比特率曲线与推导出的公式理论曲线基本吻合,说明该公式推导合理.仿真结果表明,在特定信干比和时延情况下转发式干扰能起到增强效果,可为有效对抗转发式干扰提供参考.

Aiming at the problem that FFH/2FSK communication link is greatly affected by repeater jamming,this paper firstly analyzes the bit error performance of FFH/2FSK communication link with repeater jamming,and derives the bit error rate formula of repeater jamming under 2FSK modulation.And then,the paper studies the interference effect of repeater jamming from the aspects of signal-to-noise ratio,signal-to-interference ratio,forwarding time delay and carrier frequency.The simulated bit error rate curve is basically consistent with the theoretical curve of the derived formula,indicating that the derivation of this formula is reasonable.The simulation results show that the repeater jamming can enhance the performance in the case of specific signal-to-interference ratio and time delay,which can provide reference for effective countermeasures against repeater jamming.