With the increasing proliferation of radars on vehicles, interference among vehicular radars is becoming a serious issue. In this work, we consider a frequency modulated continuous wave (FMCW) radar network with coherent radar interference where all radars adopt the same chirp slopes. Four asynchronous non-cooperative media access control (MAC) protocols are used for mutual radar interference mitigation. We propose two cross-layer performance metrics - multiple access capacity and probability of target misdetection to quantify the network performance under each MAC protocol. Based on our analysis and extensive simulations, we find the pure random access achieves a very poor trade-off between multiple access capacity and probability of target misdetection. However, such a trade-off can be significantly improved by frequency hopping and phase coding. This shows that proper MAC protocols can achieve very good performance even without synchronization and coordination. We describe new insights behind such gains that can be valuable for FMCW radar MAC design.

中文翻译：

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FMCW 雷达网络：多路访问和干扰缓解


随着车载雷达的日益普及，车载雷达之间的干扰正成为一个严重的问题。在这项工作中，我们考虑具有相干雷达干扰的调频连续波（FMCW）雷达网络，其中所有雷达均采用相同的线性调频斜率。四个异步非合作媒体访问控制 (MAC) 协议用于减轻相互雷达干扰。我们提出了两个跨层性能指标——多路访问容量和目标误检测概率来量化每个 MAC 协议下的网络性能。根据我们的分析和广泛的模拟，我们发现纯随机访问在多路访问容量和目标误检测概率之间实现了非常差的权衡。然而，这种权衡可以通过跳频和相位编码得到显着改善。这表明，即使没有同步和协调，适当的 MAC 协议也可以实现非常好的性能。我们描述了这些增益背后的新见解，这些见解对于 FMCW 雷达 MAC 设计非常有价值。