随队干扰是雷达对抗中常用的干扰方式,通常通过遮盖目标回波信号而使雷达失去探测能力,因此需要加以抑制。随队干扰经常是非平稳的随机信号,在此情况下,文中利用最小均方(LMS)自适应滤波器得到干扰的估计并将其从雷达接收信号中消除,从而给出了一种基于LMS 自适应滤波的雷达随队干扰抵消方法。首先,建立了雷达接收信号模型,包括主阵列天线接收信号和辅助阵元接收信号;然后,给出了基于LMS 自适应滤波的干扰抵消原理,它实际上将辅助阵元接收信号输入自适应滤波器得到随队干扰估计,从主阵列天线接收信号中减去此干扰估计从而实现干扰抵消,通过分析抵消器的性能发现,除了辐射干扰的目标难以探测外,编队中其他目标的信干噪比都得到了提高;最后,给出了随队干扰抵消的仿真实例,验证了上述干扰抵消方法的良好效果。

The escort jamming is a common jamming method in radar countermeasure. It usually makes the radar lose its detection ability by blanketing the echo signal, so it needs to be suppressed. The escort jamming is a non-stationary random signal, in this case the least mean square (LMS) adaptive filter is used to estimate the jamming and eliminate it from the received radar signal, therefore, a method of radar jamming cancellation based on LMS adaptive filtering is presented in this paper. Firstly, the radar receiving signal model is established, including the signal received by the main array antenna and the signal received by the auxiliary array, and then the principle of jamming cancellation based on LMS adaptive filter is given, it actually takes the input adaptive filter of the auxiliary array receiving signal to get the estimation of the jamming on-line, subtracts this estimation from the received signal of the main array antenna to achieve the jamming cancellation, the signal-to-jamming & noise of other targets in formation is improved except that the target of radiated jamming is difficult to detect. Finally, simulation examples are given to verify the good effect of the above-mentioned jamming cancellation method.

TN974

南京工业职业技术大学引进人才科研启动基金资助项目(YK21-02-04)