Figure 11.2: Interference situation for nomadic devices operated outdoors in environment Indoor-operated devices are not relevant due to transmission losses; therefore, indoor setups are implicitly covered by the outdoor scenario. This scenario is potentially relevant for the device and kiosk downloading when operated outdoors. Fixed links with scattering objects close to direct ray path In this scenario, objects close to the direct ray path may scatter/reflect power in a skyward direction towards the satellite, see Figure 11.3. This scenario is possible despite highly directive antennas. This scenario is relevant for the backhauling/fronthaulimg use case. Figure 11.3: Interference situation for fixed links with scattering objects close to direct ray path Relevant emission from antenna sidelobes High sidelobe levels may cause non-negligible radiation in a skyward direction. With fixed links these become especially critical because of potentially high output powers, see Figure 11.4. This scenario is relevant for the backhauling/fronthauling scenario. Figure 11.4: Interference situation due to relevant emission from antenna sidelobes Spectral Masks between Active Services and Earth Exploration Services (EESS) Maximum equivalent isotropically radiated power (EIRP) The clause shows how to calculate the maximum equivalent isotropically radiated power (EIRP), which is scenario path loss specific, and includes the satellite antenna gain. If the TX radiated signal does not exceed the maximum allowed interference power mask, then there will be no interference. The calculation procedure is displayed in Figure 11.5. Figure 11.5: Calculation of the maximum equivalent isotripically radiated power (EIRP) Definition of transmit power spectrum masks
Figure 11.2: Interference situation for nomadic devices operated outdoors in environment Indoor-operated devices are not relevant due to transmission losses; therefore, indoor setups are implicitly covered by the outdoor scenario. This scenario is potentially relevant for the and kiosk downloading when operated outdoors. Fixed links with scattering objects close to direct ray path In this scenario, objects close to the direct ray path may scatter/reflect power in a skyward direction towards the satellite, see Figure 11.3. This scenario is possible despite highly directive antennas. This scenario is relevant for the backhauling/fronthaulimg use case. Figure 11.3: Interference situation for fixed links with scattering objects close to direct ray path Relevant emission from antenna sidelobes High sidelobe levels may cause non-negligible radiation in a skyward direction. With fixed links these become especially critical because of potentially high output powers, see Figure 11.4. This scenario is relevant for the backhauling/fronthauling scenario. Figure 11.4: Interference situation due to relevant emission from antenna sidelobes Spectral Masks between Active Services and Earth Exploration Services (EESS) Maximum equivalent isotropically radiated power (EIRP) The clause shows how to calculate the maximum equivalent isotropically radiated power (EIRP), which is scenario path loss specific, and includes the satellite antenna gain. If the TX radiated signal does not exceed the maximum allowed interference power mask, then there will be no interference. The calculation procedure is displayed in Figure 11.5. Figure 11.5: Calculation of the maximum equivalent isotripically radiated power (EIRP) Definition of transmit power spectrum masks device
15-14-0309-09-003d-technical-requirements-document.docx