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面向自组网的通感融合技术及软硬件设计
引用本文:沈渊,胡可可,孙铭,韩东,申啸.面向自组网的通感融合技术及软硬件设计[J].太赫兹科学与电子信息学报,2023,21(4):472-481.
作者姓名:沈渊  胡可可  孙铭  韩东  申啸
作者单位:清华大学 电子工程系,北京 100091
基金项目:国家重点研发计划资助项目(2020YFC1511803)
摘    要:现有自组网通信和导航技术缺乏深度融合的框架和方法,在未来场景下难以保障未来“智慧城市”、“智能出行”等场景对通信感知的综合性需求,因此研究面向物联网、车联网等自组织网络的通感融合(ISAC)技术成为亟待解决的问题。本文针对自组网通感需求,提出了通信感知信号融合方法和技术方案,可在保障通信性能的同时提高测距感知估计精确度。针对自组网设备间、通感任务间资源需求冲突等问题,依据自组网集群业务需求,构建了保障通信需求的定位感知网络时频资源优化框架,设计了联合资源分配方案及相应迭代优化算法,实现有限资源情况下的高可靠、强稳定自组网协同感知能力。针对当前自组网通信模组存在时延高、网络覆盖范围小、感知能力缺失等问题,设计并搭建了通感一体化模块原型样机I型,可在卫导数据缺失下提供全网高精确度时钟同步,保障集群协同感知能力,并在长距离下提供自组网通信协同传输支撑,从硬件设备上为通感融合提供支撑。最终形成了一套包含通感信号融合设计、时频资源联合优化方案的自组网通信感知系统框架,并研制搭建了一套通感融合软硬件平台(含通感一体化原型样机4台)。在外场测试中,2 km内通信速率≥320 kbps,丢包率≤0.05%,感知精确度优于10 m。

关 键 词:通感融合  功率分配  自组网
收稿时间:2023/2/9 0:00:00
修稿时间:2023/3/14 0:00:00

ISAC technologies and hardware-software design for Ad Hoc network
SHEN Yuan,HU Keke,SUN Ming,HAN Dong,SHEN Xiao.ISAC technologies and hardware-software design for Ad Hoc network[J].Journal of Terahertz Science and Electronic Information Technology,2023,21(4):472-481.
Authors:SHEN Yuan  HU Keke  SUN Ming  HAN Dong  SHEN Xiao
Abstract:The existing Integrated Sensing And Communication(ISAC) technologies lack the framework and methods of deep integration, and it is difficult to guarantee the comprehensive demand of communication perception in future scenarios like "smart city" and "intelligent travel". Therefore, it is an urgent problem to study the ISAC technologies for Ad Hoc networks oriented to Internet of Things and the Internet of Vehicles. The method and technical scheme of the sensing-communication signal integration for Ad Hoc network are proposed, which can both guarantee the communication performance and improve the accuracy of ranging sensing estimation. A resource allocation scheme and its corresponding iterative optimization algorithm are proposed to deal with the time-spectrum resource conflict between sensing and communication tasks, in order to achieve the high reliability and strong stability of the ISAC Ad Hoc network collaborative awareness ability under limited resources. A hardware-software module prototype of sensing-communication integration is designed to guarantee high-precision clock synchronization of the whole network when Global Navigation Satellite System(GNSS) signal is weak, ensuring the collaborative sensing ability of the network, and providing the collaborative transmission support in long distances communication. In conclusion, an ISAC Ad Hoc system framework is built, including the integrated design of the sensing-communication signal and the joint optimization scheme of time-frequency resource; the corresponding hardware-software platform is developed, consisting of 4 ISAC module prototypes. In the field experiments of the corresponding platform within a range of 2 km, the proposed method can realize that the communication rate is above 320 kbps, the packet loss rate is less than 0.05%, and the sensing accuracy is less than 10 m.
Keywords:integrated sensing and communication  power allocation  Ad Hoc network
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