Sharing studies between IMT-Advanced systems and geostationary satellite networks in the fixed-satellite service in the 3 4004 200 and 4 500-4 800 MHz frequency bands

Executive summary This Report provides a summary of the sharing studies between IMT-Advanced systems and geostationary satellite networks in the fixed-satellite service (FSS) in the 3 400-4 200 and 4 500-4 800 MHz frequency bands. It was conducted by ITU-R in the framework of Agenda item 1.4 of WRC-07, in accordance with resolves 5 to Resolution 228 (Rev.WRC-03), as these bands were identified as candidate bands for future development of IMT-2000 and IMT-Advanced systems, as described in the Report ITU-R M.2079. The bands 3 400-4 200 MHz and 4 500-4 800 MHz are allocated worldwide on a primary basis to the FSS. This Report presents the results of the sharing studies performed between geostationary satellite networks in the FSS and IMT-Advanced systems. − Frequency usage by satellite services in these bands, provided on a global and regional basis. − FSS space and earth station deployments. − Considerations on potential identification of the 3 400-4 200 MHz and 4 500-4 800 MHz bands for IMT-Advanced. − Parameters of the systems considered in this Report. − Sharing studies (methodologies and results) between the two services from two aspects: − Interferences from IMT-Advanced transmitters to receiving FSS earth stations (in-band and adjacent band, and overdrive of the FSS receivers). − Interferences from transmitting FSS space stations to IMT-Advanced receivers. − Results from one measurement study on interference from IMT-Advanced transmitter into one television receive only (TVRO) earth station. − Mitigation techniques and spectrum management techniques to improve the sharing possibilities. − Sensitivity analysis with respect to certain parameters to show the effect of their variation on the sharing situation between both systems. 3GPP 3rd generation partnership project ACLR Adjacent channel leakage power ratio ACS Adjacent channel selectivity