Advanced Communications Technology Satellite (ACTS) fadecompensation protocol impact on very small-aperture terminal bit errorrate performance

摘要

The Advanced Communications Technology Satellite (ACTS)ncommunications system operates at Ka band. ACTS uses an adaptive rainnfade compensation protocol to reduce the impact of signal attenuationnresulting from propagation effects. The purpose of this paper is tonpresent the results of an analysis characterizing the improvement innVSAT performance provided by this protocol. The metric for performancenis VSAT bit error rate (BER) availability. The acceptable availabilityndefined by communication system design specifications is 99.5% for a BERnof 5E-7 or better. VSAT BER availabilities with and without rain fadencompensation are presented. A comparison shows the improvement in BERnavailability realized with rain fade compensation. Results are presentednfor an eight-month period and for 24 months spread over a three-yearnperiod. The two time periods represent two different configurations ofnthe fade compensation protocol