Title :
A satellite network for good weather conditions and for high rain attenuation
Author_Institution :
CNUCE Inst. of Italian Nat. Res. Council, Pisa, Italy
Abstract :
FODA (FIFO ordered demand assignment) a TDMA (time division multiple access) satellite access scheme suitable for simultaneous transmissions of real-time and bulk data is described. It is able to efficaciously counter deep fades due to rain attenuation at high frequencies, always maintaining a good channel optimization. The FODA system, using adaptive bit and coding rates, is designed to obtain the maximum out of a satellite channel in any condition. The system, already operating at 2 Mbit/s with 1/2 coded or uncoded data, is in the middle of partial redesign to cope with fades of the signal due to bad atmospheric conditions when operating in the Ka band. The reaction of the system to the fade effect is shown. The results of a deterministic study on frame utilization when fades must be countered are also presented
Keywords :
demand assigned multiple access; fading; radiowave propagation; rain; satellite relay systems; time division multiple access; tropospheric electromagnetic wave propagation; 2 Mbit/s; FIFO ordered demand assignment; FODA; Ka band; TDMA satellite access scheme; adaptive bit rates; adaptive coding rates; channel optimization; fading; frame utilization; good weather conditions; high rain attenuation; real time bulk data transmission; satellite channel; satellite network; time division multiple access; tropospheric radiowave propagation; Attenuation; Centralized control; Councils; Counting circuits; Delay; Frequency; Rain; Satellite broadcasting; Time division multiple access; Traffic control;
Conference_Titel :
Telecommunications Symposium, 1990. ITS '90 Symposium Record., SBT/IEEE International
Conference_Location :
Rio de Janeiro
DOI :
10.1109/ITS.1990.175634
