Digital false-target image synthesizer (DIS) has been proposed as a deceptive jamming method against inverse synthetic aperture radar (ISAR). The DIS method based on sub-Nyquist sampling jamming has attracted increasing attention in recent years. However, multiple false-target images generated by sub-Nyquist sampling jamming are distributed in the down-range direction rather than the 2-D range-Doppler (RD) imaging plane. A novel DIS method is proposed in this letter. First, an additional phase controlled by polyphase code is added to the intercepted pulse, and the multiple false-target images will be induced regularly along the cross-range direction. Second, in order to generate false-target images both along the down-range and cross-range directions, the sub-Nyquist sampling theory is applied to the first step. The advantage of the proposed method is implementation simplicity. Experimental results verify the effectiveness of the proposed method.

中文翻译：

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基于多相码和亚奈奎斯特采样的抗ISAR数字伪目标图像合成方法

数字假目标图像合成器 (DIS) 已被提出作为一种针对逆合成孔径雷达 (ISAR) 的欺骗性干扰方法。基于亚奈奎斯特采样干扰的 DIS 方法近年来受到越来越多的关注。然而，亚奈奎斯特采样干扰产生的多幅假目标图像分布在下行方向，而不是二维距离多普勒（RD）成像平面。这封信中提出了一种新的 DIS 方法。首先，在截获的脉冲中加入一个由多相码控制的附加相位，沿横距方向有规律地诱导出多幅假目标图像。其次，为了生成沿向下和横向两个方向的假目标图像，将亚奈奎斯特采样理论应用于第一步。所提出方法的优点是实现简单。实验结果验证了所提出方法的有效性。