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Advanced space communications architecture study. Volume 1: Executive summaryThe technical feasibility and economic viability of satellite system architectures that are suitable for Customer Premise Service (CPS) communications is investigated. System evaluation is performed at 30/20 GHz (Ka-band); however, the system architectures examined are equally applicable to 14/11 GHz (Ku-band). Emphasis is placed on system that permit low cost user terminals. Frequency Division Multiple Access (FDMA) is used on the uplink, with typically 10,000 simultaneous accesses per satellite, each of 64 kbps. Bulk demodulators onboard the satellite, in combination with a baseband multiplexer, convert the many narrowband uplink signals into a small number of wideband data streams for downlink transmission. Single hop network interconnectivity is accomplished through use of downlink scanning beams. Each satellite is estimated to weigh 5600 lb and consume 6850W of power; the corresponding payload totals are 1000 lb and 5000W. Nonrecurring satellite cost is estimated at $110 million, with the first unit cost at $113 million. In large quantities, the user terminal cost estimate is $25,000.
Document ID
19870009263
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Horstein, Michael
(TRW Electronic Systems Group Redondo Beach, CA, United States)
Hadinger, Peter J.
(TRW Electronic Systems Group Redondo Beach, CA, United States)
Date Acquired
September 5, 2013
Publication Date
March 1, 1987
Subject Category
Communications And Radar
Report/Patent Number
NASA-CR-179591
NAS 1.26:179591
Accession Number
87N18696
Funding Number(s)
PROJECT: RTOP 650-60-26
CONTRACT_GRANT: NAS3-24743
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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