基于跨周期时延控制的分布式干扰系统空间功率合成方法研究

Research into Spatial Power Synthesis Method for Distributed Jamming System Based on Cross Cycle Delay Control

针对分布式干扰系统实现空间功率合成对时间和相位控制精度要求高、难以工程实现的问题,提出了一种基于跨周期时延控制的空间功率合成方法。该方法通过测量接收信号的到达时间和相位,在进行干扰发射时,对发射信号进行时间和相位补偿,对接收信号时间进行微调,使得微调后的时延为信号周期的整数倍,且不大于信号周期的一半,对微调后时延取反和相位取反,作为干扰信号的发射时间和初始相位,实现分布式干扰系统的干扰信号在目标区域处功率合成。由于到达时间测量精度仅影响信号调整周期的个数,因此对相参合成效率影响不大。仿真结果表明,该方法能够在时延测量精度不高的情况下实现一定精度的相参合成效率,可有效解决分布式干扰系统空间功率合成难以工程实现的问题,具有较高的工程应用价值。

To solve the problems that the requirements to the control precision of time and phase is high to realize spatial power synthesis in distributed jamming system,and is difficult to be realized in engineering,a spatial power synthesis method based on cross cycle delay control is proposed.This method measures the arrival time and phase of the received signal,compensates the time and phase of the transmitted signals during jamming transmission,and tunes the time of the received signal tinily,so that the time delay after fine tuning is an integral multiple of the signal cycle,and is not more than half of the signal cycle.The time delay and phase after fine tuning are reversed as the transmission time and initial phase of the jamming signal,the power synthesis of jamming signals in distributed jamming system are realized at the target area.Since the time of arrival measurement accuracy only affects the number of signal adjustment cycles,it has little impact on the coherent synthesis efficiency.The simulation results show that this method can achieve a certain accuracy of coherent synthesis efficiency under the condition of low delay measurement accuracy,and can effectively solve the problem that the spatial power synthesis of distributed jamming system is difficult to be achieved in engineering,which has high engineering application value.