AIAA-2006-5370 Efficient GSM/UMTS Backhauling over Satellite
DLR Activities in the Field of Personal Satellite Communications Systems
AIAA-2003-2349 Cost and Performance of HEO and GEO European Satellite Radio Systems
AIAA-2003-2317 Aeronautical Communications for Personal and Multimedia Services via Satellite
DLR Activities in the Field of Personal Satellite Communications Systems