| 1. |
- Fallgren, Mikael, et al.
(författare)
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Fifth-Generation Technologies for the Connected Car Capable Systems for Vehicle-to-Anything Communications
- 2018
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Ingår i: IEEE Vehicular Technology Magazine. - 1556-6080 .- 1556-6072. ; 13:3, s. 28-38
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Tidskriftsartikel (refereegranskat)abstract
- Two strong technology trends, one in the mobile communications industry and the other in the automotive industry, are becoming interwoven and will jointly provide new capabilities and functionality for upcoming intelligent transport systems (ITSs) and future driving. The automotive industry is on a path where vehicles are continuously becoming more aware of their environment due to the addition of various types of integrated sensors. At the same time, the amount of automation in vehicles increases, which, with some intermediate steps, will eventually culminate in fully automated driving without human intervention. Along this path, the amount of interactions rises, both in-between vehicles and between vehicles and other road users, and with an increasingly intelligent road infrastructure. As a consequence, the significance and reliance on capable communication systems for vehicleto-anything (V2X) communication is becoming a key asset that will enhance the performance of automated driving and increase further road traffic safety with combination of sensor-based technologies [1].
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| 2. |
- Jungnickel, Volker, et al.
(författare)
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The role of small cells, coordinated multi-point and massive MIMO in 5G
- 2014
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Ingår i: IEEE Communications Magazine. - 0163-6804 .- 1558-1896. ; 52:5, s. 44-51
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Tidskriftsartikel (refereegranskat)abstract
- 5G will have to support a multitude of new applications with a wide variety of requirements, including higher peak and user data rates, reduced latency, enhanced indoor coverage, increased number of devices, and so on. The expected traffic growth in 10 or more years from now can be satisfied by the combined use of more spectrum, higher spectral efficiency, and densification of cells. The focus of the present article is on advanced techniques for higher spectral efficiency and improved coverage for cell edge users. We propose a smart combination of small cells, joint transmission coordinated multipoint (JT CoMP), and massive MIMO to enhance the spectral efficiency with affordable complexity. We review recent achievements in the transition from theoretical to practical concepts and note future research directions. We show in measurements with macro-plus-small-cell scenarios that spectral efficiency can be improved by flexible clustering and efficient user selection, and that adaptive feedback compression is beneficial to reduce the overhead significantly. Moreover, we show in measurements that fast feedback reporting combined with advanced channel prediction are able to mitigate the impairment effects of JT CoMP.
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| 3. |
- Li, Zexian, et al.
(författare)
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5GCAR project D3.1 Intermediate 5G V2X Radio
- 2018
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- The 5GCAR project aims to contribute to 5G network design, and specifically to design V2X technology components for V2X use case classes identified in the project. The requirements on reliability, latency, data rates, spectral and energy efficiency cannot be fully supported by today’s wireless networks and V2X solutions and call for novel and innovative approaches, including the design of a new radio interface.
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| 4. |
- Schellmann, Malte, et al.
(författare)
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V2X Radio Interface
- 2021
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Ingår i: Cellular V2X for Connected Automated Driving. - : Wiley. ; , s. 137-189
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- This chapter provides insights into key aspects of the radio interface design for vehicle-to-everything (V2X) communications for connected automated driving and connected road user services. A key technology component in the 5G NR system is the application of beamforming techniques with narrow beams in the mm-wave spectrum to overcome the dominant path-loss effect. The chapter presents different beamforming schemes. It focuses on extensions of the air interface in the PHY and MAC layer to address the challenges for V2V communication among a large number of distributed vehicles in highly mobile environments. Short-range communication established by the V2V sidelink enables the facilitation of new communication concepts for V2X: neighboring user equipments in a close vicinity can cooperate in uplink and downlink transmissions with a base station to make use of additional link diversity, which can be beneficially exploited to improve overall reliability at a reasonable system cost.
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