论文标题
FMCW雷达网络的插入ALOHA和CSMA协议
Slotted ALOHA and CSMA Protocols for FMCW Radar Networks
论文作者
论文摘要
我们研究FMCW雷达网络中的中等访问。我们假设所有雷达都使用相同的参数，例如，chirp持续时间，chirp斜率，截止频率，每个数据包的轰鸣声等，并提出和分析插入的Aloha和CSMA协议来减轻窄带干扰。我们定义了吞吐量的概念，以量化所提出的协议的性能。对于Aloha，我们将干扰概率和吞吐量分析为系统参数的函数。我们观察到干扰概率和吞吐量的行为可能与无线通信网络不同。例如，如果每个数据包的轰动数大于一个，则对于更高的传输速率，干扰概率可能较小。我们定义了一个中等感应程序，称为“清晰通道评估”（CCA），作为拟议的CSMA的一部分，还定义了CCA的成功和故障事件。在CSMA中，仅在成功的CCA之后发射雷达。我们研究了CCA的成功概率，干扰概率和吞吐量作为系统参数的功能。我们观察到，与无线通信网络不同，使用最高的尝试率可以在几种网络方案中最大化吞吐量。我们进行广泛的模拟来验证我们的分析结果并比较开槽的Aloha和CSMA。我们观察到，在所有现实情况下，CSMA都优于Aloha。
We study medium access in FMCW radar networks. We assume that all the radars use same parameters, e.g., chirp duration, chirp slope, cutoff frequency, number of chirps per packet, etc, and propose and analyze slotted ALOHA and CSMA protocols to mitigate narrowband interference. We define a notion of throughput to quantify the performance of the proposed protocols. In the case of ALOHA, we analyze interference probability and throughput as functions of the system parameters. We observe that interference probability and throughput may behave differently than in wireless communication networks. For instance, if the number of chirps per packet is larger than one, the interference probabilities may be smaller for higher transmission rates. We define a medium sensing procedure, referred to as clear channel assessment (CCA), as a part of the proposed CSMA, and also define CCA success and failure events. In CSMA, the radars transmit only after a successful CCA. We study, CCA success probability, interference probability and throughput as functions of the system parameters. We observe that, unlike wireless communication networks, using the highest possible attempt rates may maximize throughput in few network scenarios. We perform an extensive simulation to verify our analytical results and to compare slotted ALOHA and CSMA. We observe that CSMA outperforms ALOHA in all realistic scenarios.
