The Institute of Information and Navigation, Air Force Engineering University, Xi'an 710077, China.
The Collaborative Innovation Center of Information Sensing and Understanding, Xi'an 710077, China.
Sensors (Basel). 2021 Nov 19;21(22):7702. doi: 10.3390/s21227702.
Interrupted sampling repeater jamming (ISRJ) is an effective method for implementing deception jamming on chirp radars. By means of frequency-shifting jamming processing of the target echo signal and pulse compression during image processing, a group of false targets will appear in different spatial locations around the true target. Extracting the features of these false targets is complex and limited to existing countering methods against ISRJ. This paper proposes an anti-jamming method to identify the spatial location characteristics of two-dimensional deception false targets. By adjusting the parameters of the radar transmitted signal, the method simultaneously transmits the anti-jamming signal and carries out false target identification and elimination in the range and azimuth dimensions. Eventually, the optimal signal parameter design of the anti-jamming signal is obtained by comparing different anti-jamming strategies in the range dimension. The validity of the proposed method is proved by deducing the mathematical model between the spatial distribution characteristics of the false targets and the radar transmitted signal parameters and demonstrated by simulations.
间断采样转发干扰（ISRJ）是对线性调频雷达实施欺骗干扰的一种有效方法。通过对目标回波信号进行频移干扰处理，并在图像处理过程中对脉冲压缩，会在真实目标周围的不同空间位置出现一组虚假目标。提取这些虚假目标的特征非常复杂，并且受到现有针对 ISRJ 对抗方法的限制。本文提出了一种二维欺骗式虚假目标空间位置特征识别的抗干扰方法。通过调整雷达发射信号的参数，该方法可以在距离和方位两个维度上同时发送抗干扰信号，并进行虚假目标的识别和消除。最终，通过在距离维上比较不同的抗干扰策略，得到了最优的抗干扰信号参数设计。通过推导虚假目标的空间分布特征与雷达发射信号参数之间的数学模型，并通过仿真进行验证，证明了所提方法的有效性。
