雷达与通信网共存于共享频段的性能分析
Performance of Radar and Communication Networks Coexisting in Shared Spectrum Bands
摘要：
最近的技术进步使得紧凑、低成本、低功率的毫米波雷达在许多应用中提供环境意识成为可能，从汽车到室内测绘和无线电资源优化。这些新兴的用例为大量雷达和宽带通信设备共存的网络铺平了道路，以可能不协调的方式共享共同的频谱。虽然清楚地了解相互干扰如何影响雷达和通信性能是正确系统设计的关键，但在这种情况下出现的核心权衡在很大程度上仍未得到探索。在本文中，我们提供的结果，有助于弥合这一差距，通过分析模型和广泛的模拟。为了捕捉这两个系统之间的基本相互作用，我们研究毫米波网络，脉冲雷达与通信设备共存，访问信道ALOHA政策。我们调查的共存系统的性能，包括网络密度，雷达和通信节点在网络中的分数，天线方向性，和数据包长度的关键参数的影响。我们量化的相互干扰在共存的情况下对雷达检测和通信网络吞吐量的影响，突出一些非平凡的相互作用，并得出有用的设计权衡。
英文摘要：
Recent technological advancements are making the use of compact, low-cost, low-power mm-wave radars viable for providing environmental awareness in a number of applications, ranging from automotive to indoor mapping and radio resource optimisation. These emerging use-cases pave the road towards networks in which a large number of radar and broadband communications devices coexist, sharing a common spectrum band in a possibly uncoordinated fashion. Although a clear understanding of how mutual interference influences radar and communications performance is key to proper system design, the core tradeoffs that arise in such scenarios are still largely unexplored. In this paper, we provide results that help bridge this gap, obtained by means of an analytical model and extensive simulations. To capture the fundamental interactions between the two systems, we study mm-wave networks where pulsed radars coexist with communications devices that access the channel following an ALOHA policy. We investigate the effect of key parameters on the performance of the coexisting systems, including the network density, fraction of radar and communication nodes in the network, antenna directivity, and packet length. We quantify the effect of mutual interference in the coexistence scenario on radar detection and communication network throughput, highlighting some non-trivial interplays and deriving useful design tradeoffs.
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