As key sensors of the ADAS, mmWave radars have been widely used for fulfilling tasks including adaptive cruise control, lane-changing assistance and collision avoidance. However, the interference generated by mmWave radars mounted on close-by vehicles, if not managed well, could seriously degrade the radars’ performance, giving rise to a safety hazard. In this work, we study interference mitigation for the off-the-shelf 77 GHz FMCW mmWave radars. We review several state-of-the-art ideas for suppressing co-channel interference, based on which we introduce a VANET-assisted radar interference mitigation scheme, which is shown to be effective in an environment with dense traffic. Specifically, a TDMA based MAC protocol is devised that enables the coordination among vehicles on efficient multiple access of radar spectrum. Numerical results corroborate the performance gain of the proposed approach compared to the existing random frequency hopping approaches.

中文翻译：

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VANET协助缓解毫米波汽车雷达传感器的干扰

作为ADAS的关键传感器，毫米波雷达已广泛用于完成包括自适应巡航控制，变道辅助和避免碰撞在内的任务。但是，如果管理不当，安装在附近车辆上的毫米波雷达所产生的干扰可能会严重降低雷达的性能，从而带来安全隐患。在这项工作中，我们研究了现成的77 GHz FMCW mmWave雷达的干扰减轻。我们回顾了几种抑制同频干扰的最新技术，在此基础上，我们引入了一种VANET辅助的雷达干扰缓解方案，该方案在交通繁忙的环境中被证明是有效的。具体地，设计了基于TDMA的MAC协议，其使得能够在雷达频谱的有效多路访问上在车辆之间进行协调。