Table of Contents
Annex1-Characteristicsofafixed-satelliteservice
hypotheticalreferencedigitalpathforming
partofanintegratedservicesdigitalnetwork
1Introduction
264kbit/ssatellitechannelsformingpartoftheISDNHRX
2.1PerformancerequirementsoftheFSSHRDP
2.2Othererror-causingmechanisms
2.1.1Satellitesystemerrorperformanceobjectives
2.1.2ITU-TRecommendationG.821requirements
2.1.3BEPmodelsrequiredtomeetITU-TRecommendation
G.821
2.2.4Signalpathswitchinginthesatellite
2.2.5Effectsofequipmentswitch-oversonITU-T
RecommendationG.821parameters
3Error-performancecalculationsandmodels
3.1Introduction
3.2Methodofcalculation
3.3Performanceofmodels
3.4Practicalmeasurementprocedures
3.4.1Introduction
3.4.2Measurementalgorithms
4Examplesoftypicalsatellitelinkperformance
4.1Attenuationmodel
4.2Propagationconsiderationsrelatingtoshort-term
objectives
4.3ResultsofmeasurementsontheTELECOM-1satellite
5Errordistributionsonasatellitelinkandtheeffects
ofuncodedoperationandoperationutilizingforward
errorcorrection
5.1Introduction
5.2CharacteristicsoftypicalFECcodingschemes
5.2.1Rate7/8BCHcoding
5.2.2Convolutionalencoding-Viterbidecoding
5.2.3Convolutionalcoding-sequentialdecoding
5.3Effectsondegradedminutes,severelyerrored
secondsanderroredseconds
5.3.1Qualitativediscussion
5.3.2Measurements
5.3.3Quantitativeanalysis
5.4Mathematicalmodelling
5.4.1TheNeyman-Acontagiousdistribution
5.4.2AnalyticalrepresentationforaBCHcode
5.5Impactonsystemdesigninthe14/11GHzband
5.6Conclusions
