抗主瓣多假目标欺骗干扰EPC-MIMO波形自适应优化设计技术

Adaptive Optimization Design Technology of EPC-MIMO Waveform Against Mainlobe Multiple False Targets Deception Jamming

本文针对主瓣多假目标欺骗干扰对抗的难题,提出一种基于阵元脉冲编码多输入多输出(Element-Pulse Coding Multiple-Input Multiple-Output,EPC-MIMO)波形自适应设计的干扰抑制方法.阵元脉冲编码技术可在不影响真目标回波特性前提下,调整假目标在发射频率域的能量分布.利用这一特性,本文以真假目标空域相关性极小化为优化目标设计EPC-MIMO波形,使假目标能量分布于真目标空域检测区域外,进而在接收端通过数字波束形成实现假目标的有效抑制.此外,由于EPC-MIMO波形的自适应设计需要对干扰进行认知,本文还提出一种基于EPCMIMO波形的干扰快速认知方法.仿真实验验证了所提方法的有效性.

A multiple false targets deception jamming suppression method based on the optimization design of the element-pulse coding multiple-input multiple-output(EPC-MIMO)waveform is proposed.EPC can change the energy distri⁃bution of false targets in the transmitting frequency domain but not affect the true target.Using this feature,this paper opti⁃mizes the EPC-MIMO waveform with the objective function of minimizing the spatial correlation between the real and false targets.It can distribute the jamming energy outside the target airspace detection area.And then false targets can be effec⁃tively suppressed at the receiving end by digital beam forming.At the same time,since this method is realized under the condition of jamming cognition,this paper also proposes a fast jamming cognition method based on EPC-MIMO waveform to form a waveform design-jamming cognition closed-loop system.Simulation experiments verify the effectiveness of the proposed methods.