NDLI: An approach attaining adjustable designated footprint

Content Provider	IEEE Xplore Digital Library
Author	Wan-Hsin Hsieh Chieh-Fu Chang Ming-Seng Kao
Copyright Year	2009
Description	Author affiliation: National Space Organization, 8F, 9 Prosperity 1st Rd., Hsinchu 30078, Taiwan (Chieh-Fu Chang) \|\| National Chiao Tung University, 1001 Dasyue Rd., Hsinchu 30010, Taiwan (Wan-Hsin Hsieh; Ming-Seng Kao)
Abstract	In satellite communications, the footprint is characterized by contour lines with specific receiving power. When data is delivered to the area within a specific footprint, called the designated footprint, illegal users outside the boundary of designated footprint (BDF) can still receive the signal with degraded power. In other words, illegal users can obtain the transmitted data with higher error probability. In this paper, we present a special two-stage serially concatenated (2-SC) coding scheme to more precisely define the designated footprint. Hence users outside the BDF are excluded from obtaining the data, i.e. they cannot correctly decode the data. The key technique, 2-SC coding scheme, achieves the brick-wall effect in error performance regarding bit energy-to-noise density ratio ( Eb / N0 ). The brick-wall effect has sharp cutoff at a critical Eb / N0 . When the transmitted data is protected by the 2-SC coding scheme, only the users within the designated footprint can successfully decode the data. Otherwise, for users outside the BDF with received Eb / N0 slightly less than critical Eb / N0 , even if the coding structure is known, they cannot correctly decode the data. Thus the BDF is sharply defined by the critical Eb / N0 . Moreover, by means of purposely-introduced error in the codewords, we can adjust the critical Eb / N0 and the BDF. We provide comprehensive analysis of the coding performance and further discuss the application of the proposed scheme to enhance secure satellite communications.
Starting Page	1
Ending Page	8
File Size	443444
Page Count	8
File Format	PDF
ISBN	9781424426218
ISSN	1095323X
DOI	10.1109/AERO.2009.4839409
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-03-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Bit error rate Signal design Satellite communication Decoding Error probability Concatenated codes Performance analysis Directional antennas Degradation Protection
Content Type	Text
Resource Type	Article
Subject	Aerospace Engineering Space and Planetary Science

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