Concepts for 20/30 GHz satcom systems for direct-to-user applicationsA baseline technique is described for implementing a direct-to-user (DTU) satcom communications system at 20/30 GHz transmission frequency. The purpose of this application is to utilize the high capacity frequency spectrum at K(A) band for communications among thousands of small terminals located at or close to a customer's facility. The baseline DTU system utilizes a TDMA method of communications with QPSK modulation. Twenty-five coverage beams from a geosynchronous orbit spacecraft provide full coverage of CONUS. Low cost terminals are limited to less than 4.5 meters diameter. The impact of rain attenuation on communications availability is examined. Other techniques including satellite switched antenna beams are outlined and critical K(A)-band technology developments are identified.
Document ID
19800051159
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Jorasch, R. (Ford Aerospace and Communications Corp. Palo Alto, CA, United States)
Davies, R. (Ford Aerospace and Communications Corp. Palo Alto, CA, United States)
Baker, M. (Ford Aerospace and Communications Corp. Palo Alto, Calif., United States)
Date Acquired
August 10, 2013
Publication Date
April 1, 1980
Subject Category
Launch Vehicles And Space Vehicles
Report/Patent Number
AIAA PAPER 80-0582
Meeting Information
Meeting: Communications Satellite Systems Conference