PERFORMANCE EVALUATION OF DATA MODEMS FOR THE AERONAUTICAL SATELLITE CHANNEL

Several modems and satellite subsystems were tested with the aid of an aeronautical channel simulation facility. The modems tested included a high performance DPSK modem, a high performance CPSK modem, two hybrid voice/data modems, and a lower performance CPSK modem. Data Performance results are presented in the form of Probability of Bit Error versus Signal to Noise Density and Signal to Multipath Ratios with Doppler Spread as a parameter. Some tests were conducted with a hard limiting IF processor in cascade with the channel simulator to simulate satellite characteristics. The characteristics of the aeronautical satellite channel simulator are also described. The discussion concludes with a general evaluation of the effect of aeronautical satellite channel characteristics on modem performance, as derived from the simulation experiments. (Author)

• Corporate Authors:

  Transportation Systems Center

  55 Broadway, Kendall Square
  Cambridge, MA  United States  02142

  Federal Aviation Administration

  Systems R&D Service, 800 Independence Avenue, SW
  Washington, DC  United States 
• Authors:
  • Duncombe, C B
  • Salwen, H
• Publication Date: 1975-9

Media Info

• Pagination: 41 p.

Subject/Index Terms

• TRT Terms: Aircraft; Data communications; Doppler effect; L band; Modems; Multipath transmission; Phase shift; Phase transitions; Pulse duration modulation; Satellite communication; Signal processing; Signal to noise ratio; Simulation; Speech; Voice communication
• Uncontrolled Terms: Data links
• Old TRIS Terms: Phase shift keyers
• Subject Areas: Aviation; Vehicles and Equipment;

Filing Info

• Accession Number: 00093410
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: TSC-FAA-75-13 Intrm Rpt., FAA-RD-75-150
• Files: NTIS, USDOT
• Created Date: Dec 29 1976 12:00AM