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    • A Spectrally efficient PMR system utilizing broadcast service 

      Sengül, E.; Köymen, Hayrettin; İder, Y. Z. (Institute of Electrical and Electronics Engineers, 2005)
      Different trunked Private Mobile Radio (PMR) systems have been designed over the last several decades, all of which have symmetric downlink and uplink channel capacities. Due to this symmetry, these systems may not be ...