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According to the results of the Study#A.2 of  (based on implementation of coordination distances) the required separation distance for rural environment for land path is 18 km for RSBN ground receivers of the ARNS system and 90 km for RLS 2 Type 2.
A third study is the one in , where analytical calculations (MCL) showed that the required protection distance for rural environment between RSBN ground receivers of the ARNS system and the mobile service BS is 132 km.
Two cases are considered: RSBN receiving ground station operating at 784 MHz and RLS2 Type 2 receiving ground station operating at 740 MHz (according to Recommendation ITU-R M.1830).
The required path loss between the LTE BS transmitter and the RSBN ground receiver of 1 MHz bandwidth is
The maximum permissible interference level produced by interfering LTE BS, [P.sub.I_BS_max permissible_RSBN_Rx], at RSBN ground receiver of 1 MHz bandwidth is
The calculated required protection (coupling) distance, [d.sub.sep_req_ARNS-BS], between LTE base station and the ARNS RSBN receiving ground station is about 132 km at 10 m receiving antenna height, i.e., longer than radio horizon.
SEAMCAT Monte Carlo simulation results show the required separation distance between the LTE BS (downlink) and ARNS ground receiver (only RSBN was considered).
The calculation results present that the required separation distance must be more than about15 km for RSBN ground receiver and about 45 km for RLS 2 Type 2 ground receiver.
Electromagnetic compatibility between LTE BS downlink and ARNS ground receiver was assessed with three different methods: MCL calculations for worst case scenario and Monte Carlo method simulations for more realistic case (only RSBN ground receiver was considered), and predetermined aggregate trigger field strength values for protection of ARNS.
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