NDLI: Robustness capabilities of transponded commercial satellite communications

Content Provider	IEEE Xplore Digital Library
Author	Felstead, E.B. Keightley, R.J.
Copyright Year	1995
Description	Author affiliation: Communication Res. Centre, Ottawa, Ont., Canada (Felstead, E.B.)
Abstract	The robustness of transponding commercial satcom to uplink jamming is investigated. It is assumed that the transponder is designed to handle a certain number of simultaneous users using FDMA or TDMA and without considering jamming. The transponder is assumed to have one of the standard nonlinearities. It is shown that multiple access combined with high power amplifier (HPA) backoff provide a form of protection from jamming akin to spread spectrum. The vulnerability to attack on a single user can be overcome by introducing spread spectrum. The jamming level needed to cause all users to have unacceptable error rates must be comparable to the sum of the user powers, and it was found that this level is generally slightly lower than that to cause the transponder to go into saturation. Therefore, transponders were found to have useful inherent robustness. Generic examples are used to illustrate these conclusions.
Starting Page	783
Ending Page	787
File Size	650812
Page Count	5
File Format	PDF
ISBN	0780324897
DOI	10.1109/MILCOM.1995.483634
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-11-05
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Robustness Satellites Jamming Transponders Spread spectrum communication Frequency division multiaccess Time division multiple access High power amplifiers Protection Error analysis
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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