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  • 1
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    Unknown
    30/20 GHz demonstration system for improving orbit utilization (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: To guard against severe rain losses at 30 and 20 GHz, techniques are being developed which provide the high antenna gain needed to increase communications margins and frequency reuse capability through beam isolation, while providing complete coverage of the U.S. Effective bandwidths from a single satellite location may then reach tens of gigahertz, with capacity tailored to match nonuniform geographic demand patterns. Satellite onboard processing which includes forward-error-correction and the routing of channels to terminals will reduce scanning antenna requirements and increase rain margins, through the adaptive use of system margins to support those terminals experiencing rain. These antenna and onboard processing techniques are adaptable to C-band and Ku-band, in addition to Ka-band.
    Keywords: COMMUNICATIONS AND RADAR
    Type: In: ITC/USA/''80; Oct 14, 1980 - Oct 16, 1980; San Diego, CA
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Multigigabit satellite on-board signal processing (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The satellite communication system described provides communications for very small and very large (trunking) users. Independent combinations of FDMA and TDMA are used in the uplink and downlink designs to minimize terminal costs. Signal routing for small users is accomplished by a digital store-and-forward technique which greatly simplifies the terminal receiver, compared to satellite-switched TDMA. Different processing techniques are used for very high data rate users, but complete interconnectivity between all users is maintained. This avoids double-hop routing with excessive transmission delays.
    Keywords: COMMUNICATIONS AND RADAR
    Type: AIAA PAPER 80-0583 , Communications Satellite Systems Conference; Apr 20, 1980 - Apr 24, 1980; Orlando, FL
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 3
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    An advanced mixed user domestic satellite system architecture (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A domestic satellite system architecture that can efficiently and economically accommodate a wide variety of disparate user classes is described and a baseline system configuration identified. With such a technique, both the efficiency of TDMA operation and the operational terminal flexibility of FDMA can be simultaneously achieved.
    Keywords: COMMUNICATIONS AND RADAR
    Type: AIAA PAPER 80-0494 , Communications Satellite Systems Conference; Apr 20, 1980 - Apr 24, 1980; Orlando, FL
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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