Unmanned Aerial Vehicles(UAVs)are gaining increasing attention in many fields,such as military,logistics,and hazardous site mapping.Utilizing UAVs to assist communications is one of the promising applications and rese...Unmanned Aerial Vehicles(UAVs)are gaining increasing attention in many fields,such as military,logistics,and hazardous site mapping.Utilizing UAVs to assist communications is one of the promising applications and research directions.The future Industrial Internet places higher demands on communication quality.The easy deployment,dynamic mobility,and low cost of UAVs make them a viable tool for wireless communication in the Industrial Internet.Therefore,UAVs are considered as an integral part of Industry 4.0.In this article,three typical use cases of UAVs-assisted communications in Industrial Internet are first summarized.Then,the state-of-the-art technologies for drone-assisted communication in support of the Industrial Internet are presented.According to the current research,it can be assumed that UAV-assisted communication can support the future Industrial Internet to a certain extent.Finally,the potential research directions and open challenges in UAV-assisted communications in the upcoming future Industrial Internet are discussed.展开更多
Stokes vectors direct detection(SV-DD)is an effective solution for short-reach optical communications.In this Letter,we investigate two-dimensional-modulation direct-detection systems based on three Stokes vector rece...Stokes vectors direct detection(SV-DD)is an effective solution for short-reach optical communications.In this Letter,we investigate two-dimensional-modulation direct-detection systems based on three Stokes vector receivers(SVRs).The influences of three key factors including the states-of-polarization(SOP),the splitting ratio of the coupler,and the excess loss(EL)are studied in detail.It is shown that the splitting ratio for achieving optimum performance will be changed with SOP and EL conditions.Among these SVRs,the3×3 coupler-based receiver with its optimal splitting ratio shows the best bit error rate performance and stability against the change of SOP.展开更多
基金supported in part by National Key Research&Devel-opment Program of China(2021YFB2900801)in part by Guangdong Basic and Applied Basic Research Foundation(2022A1515110335)in party by Fundamental Research Funds for the Central Universities(FRF-TP-22-094A1).
文摘Unmanned Aerial Vehicles(UAVs)are gaining increasing attention in many fields,such as military,logistics,and hazardous site mapping.Utilizing UAVs to assist communications is one of the promising applications and research directions.The future Industrial Internet places higher demands on communication quality.The easy deployment,dynamic mobility,and low cost of UAVs make them a viable tool for wireless communication in the Industrial Internet.Therefore,UAVs are considered as an integral part of Industry 4.0.In this article,three typical use cases of UAVs-assisted communications in Industrial Internet are first summarized.Then,the state-of-the-art technologies for drone-assisted communication in support of the Industrial Internet are presented.According to the current research,it can be assumed that UAV-assisted communication can support the future Industrial Internet to a certain extent.Finally,the potential research directions and open challenges in UAV-assisted communications in the upcoming future Industrial Internet are discussed.
基金supported by the National Natural Science Foundation of China(Nos.61671053,61871030,and 61435006)the Fundamental Research Funds for the Central Universities(No.FRF-BD-17-015A)+1 种基金the Foundation of Beijing Engineering and Technology Center for Convergence Networks and Ubiquitous Services,the State Key Laboratory of Advanced Optical Communication Systems Networks,China,the Hong Kong Polytechnic University(Nos.1-ZVGB,G-SB65,and 4-BCCK)the RGC of Hong Kong SAR Government(No.152248/15E)
文摘Stokes vectors direct detection(SV-DD)is an effective solution for short-reach optical communications.In this Letter,we investigate two-dimensional-modulation direct-detection systems based on three Stokes vector receivers(SVRs).The influences of three key factors including the states-of-polarization(SOP),the splitting ratio of the coupler,and the excess loss(EL)are studied in detail.It is shown that the splitting ratio for achieving optimum performance will be changed with SOP and EL conditions.Among these SVRs,the3×3 coupler-based receiver with its optimal splitting ratio shows the best bit error rate performance and stability against the change of SOP.
