Yongzhong Zhu

Sep 24, 2024 | mdpi.com | Bao Xiong |Wenxuan Xie |Yongzhong Zhu

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May 27, 2024 | mdpi.com | Lingling Zhang |Yongzhong Zhu |Yijun Chen |Wenxuan Xie

1. IntroductionTraditional radar detection systems [1,2,3,4] mainly rely on the relative motion of the radar and the target along the line of sight direction, that is, a linear Doppler frequency shift, to obtain the motion information of the target. However, because of how planar electromagnetic waves work, the line Doppler frequency shift of the target echo will disappear when the target’s motion is perpendicular to the direction of its propagation. This means that the target cannot be recognized.