面向应急通信的多无人机协同信道建模研究

doi:10.11959/j.issn.1000-436x.2023058

Abstract

Abstract:

To carry out the system design and technology development for emergency communications, and greatly improve our ability of risk prevention and emergency disposal, the research on multi-unmanned aerial vehicle (multi-UAV) cooperative channel model for emergency communications was carried out.First, the channel dataset of multi-UAV cooperative emergency communications in two typical emergency environments, i.e., the urban earthquake and suburban blizzard, was established.The channel parameters and statistical properties of multi-UAV cooperative emergency communications were analyzed.Second, a more general geometry-based stochastic channel model (GBSM) was proposed for multi-UAV cooperative emergency communications.The channel impulse response (CIR) and the cooperative non-station arity of multi-UAV cooperative channels in the space and time domains in multi-UAV cooperative emergency communications were calculated and captured.Finally, the channel characteristics of multi-UAV cooperative emergency communication in urban earthquake and suburban blizzard scenarios were analyzed, which could support the practical implementation of multi-UAV cooperative emergency communications.Meanwhile, the statistical characteristic of the proposed model can fit well with that of ray-tracing-based channel data, verifying the utility of the proposed model.

Key words: emergency communication, multi-UAV cooperative communication, ray-tracing, GBSM, cooperative time-space non-station arity

CLC Number:

TN92

Lu BAI, Mingran SUN, Ziwei HUANG, Tao FENG, Xiang CHENG. Multi-UAV cooperative channel model for emergency communication[J]. Journal on Communications, 2023, 44(7): 38-50.

Figures/Tables 12

参数	含义
M	协同无人机数量
${UAV}^{m}$	第m架无人机
$E (t)$	t时刻第一架无人机位置向量在z轴的投影
$A (t)$	t时刻GS端中心位置向量在xy 平面的投影
$R^{m} (t)$	t时刻第m架无人机相对第一架无人机位置矢量
$v_{m}^{UAV} (t), v_{m, A}^{UAV} (t)$	第m架无人机速度及其在xy 平面的投影
$v^{GS} (t)$	GS端移动速度
$θ$	水平角
$φ$	俯仰角
$Q_{R}$	均匀直线天线阵列天线个数
$ε_{R}$	均匀直线天线阵列天线间距
$N_{R}^{q}, N_{R}^{q}$	GS端第q根天线及天线向量
$N_{c} (t)$	t时刻散射簇的个数
$C_{T/R}^{n}$	第n个发射端/接收端子散射簇
$R_{n}$	第n个散射簇中射线个数
$v_{T/R}^{n}$	第n个发射端/接收端第子散射簇速度
$U_{C_{T}^{n}} (t)$	t时刻下 $C_{n}^{T}$ 为可视状态的所有无人机的集合
$λ_{R}, λ_{G}$	散射簇的重组率及生成率
$C_{d}^{s / t}$	空间/时间相关距离参数
$P_{survival}^{UAV, m} (t)$	t时刻从UAV^m到UAV^m+1的空间生存概率
$P_{survival}^{Time, C_{T/R}^{n}} (t)$	t时刻子散射簇 $C_{n}^{T}$ 和 $C_{n}^{R}$ 的时间生存概率

References 16

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