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Sökning: WFRF:(Lindberg Olof) > Konferensbidrag

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  • Ge, Yu, 1995, et al. (författare)
  • Experimental Validation of Single Base Station 5G mm Wave Positioning: Initial Findings
  • 2022
  • Ingår i: 2022 25th International Conference on Information Fusion, FUSION 2022. - Piscataway : IEEE.
  • Konferensbidrag (refereegranskat)abstract
    • 5G cellular networks can utilize millimeter wave signals, and support large bandwidths and large antenna arrays, which provide more geometric-based signals and higher delay and angle resolutions. These merits bring new opportunities in positioning the user with limited infrastructure through the use of combined angle and delay information. However, there are many practical challenges to overcome, in order to have a functioning single base station 5G mmWave positioning system. In this paper, we describe a deployed single base station mmWave positioning system, and provide an example of the measurement data. Furthermore, we perform measurement validation on a limited measurement data set by performing base station localization. Additional evaluations performed on simulation model data provide guidelines on the required size of the data set and receiver antenna configuration, which will be implemented in upcoming measurements.
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  • Lund, Cecilia, et al. (författare)
  • Mineralogical-textural characterisation of different apatite-iron ore bodies, Malmberget deposit, Sweden, treated in a sorting process in laboratory scale
  • 2010
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • The Malmberget apatite iron ore deposit encloses more than twenty ore bodies which are mined separately but are blended in the mine before it is hoisted up to the sorting plant. The geology of the deposit shows metamorphic overprints and strong alteration which makes each individual ore body heterogeneous in its composition. In this study the aim is to be able to identify and quantify important mineralogical and textural characters of each ore body which will be part and impact the upgrading process. Two different ores bodies were processed in order to simulate a dry sorting process by bench scale measurements. The analytical methods for quantitative characterisation were optical microscopy and QEMSCAN®. Preliminary results show both differences and similarities between the ore bodies. The mineralogy composition differs between the ore bodies but the most important mineral associations for both ore bodies are binary magnetite/feldspar and magnetite/FeTi-oxides. The magnetite liberation is high for both ore bodies.
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