A satellite communications experiment was conducted to develop a reliable voice communications system between paramedics and doctors at certain larger medical centers. The experiment used INMARSAT's Atlantic Ocean Region satellite which provides coverage to the western border of Ontario. Forward downlink power from the satellite is in great demand, so two highly power-efficient modulation schemes were chosen for evaluation during the experiment. These were amplitude-companded single-sideband (ACSSB) and linear predictive coding in conjunction with DMSK modulation. Good performance with a signal to noise ratio of about 10 dB was demonstrated from many parts of the province with the evevation angle to the satellite ranging from five to twenty degrees and with the aircraft both in-flight and on the runway.
Satellite communications experiment for the Ontario air ambulance service
1988-05-01
Aufsatz (Konferenz)
Keine Angabe
Englisch
Ambulance service advisory committee
Elsevier | 1970
Army ambulance service highly organized
Engineering Index Backfile | 1917
|Helicopter Ambulance Service to Emergencies
NTIS | 1971
Major disasters: an ambulance service view
Elsevier | 1990
|