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Sökning: WFRF:(Johannson A. J.)

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1.
  • Meyer, E., et al. (författare)
  • The state of the art in beyond 5G distributed massive multiple-input multiple-output communication system solutions
  • 2022
  • Ingår i: Open Research Europe. - : F1000 Research Ltd. - 2732-5121. ; 2
  • Forskningsöversikt (refereegranskat)abstract
    • Beyond fifth generation (5G) communication systems aim towards data rates in the tera bits per second range, with improved and flexible coverage options, introducing many new technological challenges in the fields of network architecture, signal pro- cessing, and radio frequency front-ends. One option is to move towards cell-free, or distributed massive Multiple-Input Multiple-Output (MIMO) network architectures and highly integrated front-end solutions. This paper presents an outlook on be- yond 5G distributed massive MIMO communication systems, the signal processing, characterisation and simulation challenges, and an overview of the state of the art in millimetre wave antennas and electronics.
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2.
  • Shea, T. J., et al. (författare)
  • Overview and status of diagnostics for the ESS project
  • 2018
  • Ingår i: Proceedings of the 6th International Beam Instrumentation Conference, IBIC 2017. - 9783954501922 ; , s. 8-15
  • Konferensbidrag (refereegranskat)abstract
    • The European Spallation Source, now under construction in Lund, Sweden, aims to be the world's most powerful pulsed neutron scattering facility. Driving the neutron source is a 5 MW superconducting proton linear accelerator operating at 4 percent beam duty factor and 14 Hz repetition rate. Nineteen partner institutions from across Europe are working with the Accelerator Division in Lund to design and construct the accelerator. The suite of accelerator instrumentation consists of over 20 unique system types developed by over 20 partners and collaborators. Although the organizational complexity presents challenges, it also provides the vast capabilities required to achieve the technical goals. At this time, the beam instrumentation team is in transition, completing the design phase while scaling up to the deployment phase. Commissioning of the ion source has commenced in Catania, preparations for installation on the Lund site are ramping up, and basic R&D on target instrumentation continues. Beam commissioning results from the systems immediately following the ion source will be presented, along with technical highlights and status of the many remaining instrumentation systems.
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  • Resultat 1-4 av 4

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