6/(50 MHz) 60.6 –35.0 7/(58 MHz) 63.4 –37.8 8/(66 MHz) 64.5 –38.9 9/(74 MHz) 64.8 –39.2 2.2 Single base-station separation distance A base-station with nominal characteristics submitted by ITU-R is considered. The required separation distance is then calculated using Recommendation ITU-R P.1546, so that the 1% time field strength from base-station just reaches values of as specified above. Table 2 shows EINT the results. 2 Interferer Separation EINT offset distance (dB(µV/m)) (km) N/(MHz) 1/(10 MHz) 51.3 13.3 2/(18 MHz) 47.5 16.4 3/(26 MHz) 50.5 14 4/(34 MHz) 54.5 11.2 5/(42 MHz) 58.4 9 6/(50 MHz) 60.6 8 7/(58 MHz) 63.4 6.6 8/(66 MHz) 64.5 6.2 9/(74 MHz) 64.8 6.1 2.3 Case of several base-stations Now, a network consisting of several IMT base-stations is constructed at the two of above base-station and also behind it. All base-stations have nominal characteristics. The area is assumed as urban and cell size is one kilometre. Now the field strengths from each base-station in the extended IMT network is calculated at 2% time, and summed to give an accumulated field strength. The increase in field strength (cumulative effect) and final separation distance at which the total field strength (considering cumulative effect) would be equal to threshold value are presented in Table 3. 3 Results 3 Interferer Initial separation Increase in field Final EINT offset (dB(µV/m)) distance strength separation (km) (Cumulative effect) distance N/(MHz) (dB) (km) 1/(10 MHz) 51.3 13.3 15 35.2
6/(50 MHz) –35.0 60.6 7/(58 MHz) –37.8 63.4 8/(66 MHz) –38.9 64.5 9/(74 MHz) –39.2 64.8 2.2 Single base-station separation distance A base-station with nominal characteristics submitted by ITU-R is considered. The required separation distance is then calculated using Recommendation ITU-R P.1546, so that the 1% time field strength from base-station just reaches values of EINT as specified above. Table 2 shows the results. 2 Interferer offset N/(MHz) EINT (dB(µV/m)) Separation distance (km) 1/(10 MHz) 51.3 13.3 2/(18 MHz) 47.5 16.4 3/(26 MHz) 50.5 14 4/(34 MHz) 54.5 11.2 5/(42 MHz) 58.4 9 6/(50 MHz) 60.6 8 7/(58 MHz) 63.4 6.6 8/(66 MHz) 64.5 6.2 9/(74 MHz) 64.8 6.1 2.3 Case of several base-stations Now, a network consisting of several IMT base-stations is constructed at the two of above base-station and also behind it. All base-stations have nominal characteristics. The area is assumed as urban and cell size is one kilometre. Now the field strengths from each base-station in the extended IMT network is calculated at 2% time, and summed to give an accumulated field strength. The increase in field strength (cumulative effect) and final separation distance at which the total field strength (considering cumulative effect) would be equal to threshold value are presented in Table 3. 3 Results 3 Interferer offset N/(MHz) EINT (dB(µV/m)) Initial separation distance (km) Increase in field strength (Cumulative effect) (dB) Final separation distance (km) 1/(10 MHz) 51.3 13.3 15 35.2
R-REP-BT.2337-2014-MSW-E.docx