ITU R S 1779:2007
ITU R S 1779:2007 Characteristics Of Fixed-satellite Service Systems Using Wideband Spreading Signals
Table of Contents
Annex1-Asatellitesystemwithwidebandspreadingsignals(directsequence(DS)technology)
1Introduction
2Application1-Asatellitesystemwithwideband
spreadingsignalsoverlaidontheconventionalFSS
FDMAsignals
2.1Systemmodels
2.2Linkbudgetanalysisandperformanceestimation
2.2.1Step1
2.2.2Step2
2.2.3Step3
2.3Resultsoflinkbudgetanalysis
2.4Summaryofavailabledatarate
2.4.1DataratewithavarietyofC/Ivalues
2.4.2DataratewithavarietyofC/Tdegradations
duetointerferencefromadjacentsatellites
2.5Impactoftheoverlayofwidebandspreadingsignals
onFDMAcarriers
2.6Discussion
3Application2-Asatellitesystemwithdedicatedbandwidths
forbothFDMAsignalsandwidebandspreadingsignals
3.1Systemmodel
3.2Linkbudgetanalysisandperformanceestimation
3.3Resultsoflinkbudgetanalysis
3.4Summaryofavailabledatarate
3.4.1Dataratewithavarietyofbandwidthsfor
spreadingsignals
3.4.2DatarateforC/Tdegradationlevelsdueto
interferencefromadjacentsatellites
3.5Discussion
4Summary
Annex2-AnFSSsystemwithanumberofnarrowspotbeams
usingtheCDMA(widebandspreadingsignals)
1Overview
2ChannelcapacityintheFDMAcase
3ChannelcapacityintheCDMAcase
4Channelcapacityevaluationusingparametersofthe
systemexample
5Summary
Annex3-Asatellitesystemusingwidebandspreadingsignals
inuplinkstoreducetheoff-axisemission
1Overview
2Exampleofthesystemparameters
3Results
4Summary