NDLI: Effects of link availability on the achievable performance with variable coding modulation Earth Observation satellites

Content Provider	IEEE Xplore Digital Library
Author	Cossu, M. Roscigno, R. Giancristofaro, D. Bertinelli, M. Riva, C. Capirone, D. Montorsi, G. Della Maggiora, M. Luise, M.
Copyright Year	2012
Description	Author affiliation: Wiser S.r.l. Address: Via Fiume 23, 57123 Livorno (Italy) (Luise, M.) \|\| Thales Alenia Politecnico di Torino - C.so Duca degli Abruzzi n.24, 10129 Torino, Italy (Capirone, D.; Montorsi, G.) \|\| Politecnico di Milano - Piazza Leonardo da Vinci 32, 20133 Milano - Italy (Riva, C.) \|\| ESA/ESTEC, Keplerlaan 1, PO Box 299, 2200 AG Noordwijk - The Netherlands (Bertinelli, M.) \|\| Thales Alenia Space - Italia, via Saccomuro 24, 00131 Roma Italy (Cossu, M.; Roscigno, R.; Giancristofaro, D.)
Abstract	Future high performance Earth Observation satellites in Low Earth Orbit (LEO) will be equipped with high rate telemetry architectures either based on X-Band (375MHz, from 8.025 GHz up to 8.4 GHz) in dual-polarization or on K-Band (25.5GHz up to 27 GHz); in particular, the migration to the K-Band is expected in case the available X-Band will not be able to sustain the mission requirements. They will be also characterized by the on-board availability of a set of coding and modulation schemes at several spectral efficiencies and different Signal-to-Noise Ratio (SNR) thresholds; these will enable the usage of Variable Coding Modulation (VCM) techniques to improve the system performance by adapting case-by-case the coding/modulation scheme to the actual local atmospheric conditions. Among the requirements that a communication system engineer shall consider in the design of the telemetry architecture, the link availability is usually not considered as a critical parameter: for X-Band is it a common approach to size the system at 99.5% of link availability at the end of coverage area i.e. at 5° of elevation angle of the ground station antenna. This paper will show that for future K-Band transmission the target link availability need to be carefully evaluated in dependence of the required data timeliness: as a general rule, a trade-off among data timeliness and overall data throughput is expected to be necessary before sizing the communication architecture.
Starting Page	1
Ending Page	7
File Size	543911
Page Count	7
File Format	PDF
ISBN	9781467346870
e-ISBN	9781467346887
e-ISBN	9781467346863
DOI	10.1109/ESTEL.2012.6400108
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-02
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Availability VCM Satellites End-to-end performance K-band Modulation Link budget Link Availability Throughput Encoding Signal to noise ratio
Content Type	Text
Resource Type	Article

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