Performance of Public Protection and Disaster Relief With Conventional and High Temperature Superconducting Receive Filters in the 800 MHz Spectrum in Australia

Public protection and disaster relief (PPDR, known also as public safety mobile broadband) is becoming an important issue in several countries, and a special frequency band will possibly be allocated to this service. A 5 MHz spectrum at 809 MHz for uplink (and at 854 MHz for downlink) has been under consideration by the Australian Communication and Media Authority for this purpose. This paper presents investigation of the performance of the PPDR service uplink with conventional and high-temperature superconducting (HTS) base station (BS) filters under interference from trunked land mobile radio services (LMRSs) located at 804-809 MHz. Results show that the application of HTS technologies to BS receivers can replace a need for large guard bands between PPDR and LMRS bands necessary for conventional technologies in order to provide reliable high-quality wireless services.