1、C:DOCUMENTS AND SETTINGSQGV33745MY DOCUMENTSDOWNLOADSR-QUE-SG04.248-1997-MSW-E.DOC 15.07.10 15.07.10 QUESTION ITU-R 248/4 Frequency sharing between systems in the fixed-satellite service and wireless digital networks around 5 GHz (1997) The ITU Radiocommunication Assembly, considering a) that, at pr
2、esent, feeder links between fixed earth stations and space station of any radiocommunication service may be provided in the frequency bands allocated to the fixed-satellite service (FSS); b) that, in the interest of spectrum conservation, many frequency bands have been allocated on a shared basis to
3、 the FSS and terrestrial services; c) that, systems in the FSS may share frequency bands with wireless digital networks in the range of frequencies around 5 GHz; d) that systems in the FSS may suffer aggregate interference from a large number of widely deployed wireless data networks in the range of
4、 frequencies around 5 GHz; e) that the technical characteristics of feeder links may be quite different from those of links entirely in the FSS; f) that sharing with services where no coordination is possible may put special limitations on the extent of sharing, decides that the following Question s
5、hould be studied 1 What are the factors that determine the maximum radiated power density that can be radiated towards space by the aggregate of wireless digital network devices? 2 What are the appropriate methods to determine the interference potential between wireless digital networks and fixed-satellite systems? 3 What criteria are appropriate for frequency sharing between systems in the FSS and wireless digital networks? further decides 1 that the above mentioned studies should be completed by 2006. _
