With increasing use of millimeter-wave radars in driving safety applications, interference between vehicles becomes a significant issue. Moreover, oscillator imperfections and relative velocity effects induce inter-carrier interference (ICI) owing to frequency offset, leading to degradation of target detection. In this paper, time-frequency resources are divided into several orthogonal logical channels according to the time-frequency division (TFD) scheme. We propose a two-stage interference mitigation method. First, an interference avoidance technique is designed for each piece of radar equipment (RE) to select logical channels with the least ICI. Then, each RE reconstructs and cancels interference according to estimated parameters based on the proposed interference cancellation technique. Computer simulations reveal that the proposed interference avoidance technique can approximately achieve the performance of ground truth, especially when the number of interferers is small. In addition, noise enhancement effects can be effectively mitigated through the proposed cancellation technique.

随着毫米波雷达在行车安全应用中的越来越多的使用，车辆之间的干扰成为一个重大问题。此外，由于频率偏移，振荡器的不完善和相对速度的影响会引起载波间干扰（ICI），从而导致目标检测性能下降。在本文中，根据时频划分（TFD）方案将时频资源划分为几个正交逻辑信道。我们提出了一种两阶段的干扰缓解方法。首先，为每个雷达设备（RE）设计了一种干扰避免技术，以选择具有最小ICI的逻辑信道。然后，基于所提出的干扰消除技术，每个RE根据估计的参数来重构和消除干扰。计算机仿真表明，所提出的避免干扰技术可以大致实现地面真实性的性能，尤其是在干扰源数量较少时。另外，通过所提出的消除技术可以有效地减轻噪声增强效果。