The CCSDS Telecommand (TC) and Telemetry (TM) standards are today being employed for a large number of scientific and commercial spacecraft. Using this standard allows reduced costs for on-board, ground and test equipment, as well as for spacecraft testing and in-orbit operation. This paper introduces the CCSDS/ESA standards, and presents the supporting standard components developed by ESA and ...

Note: The authors are collaborators on a study of inequality in early childhood education and care, funded by the Russell Sage Foundation as part of its Social Inequality program. We would like to thank Eric Wanner and the Foundation for their support and would also like to thank Jay Bainbridge, Se-Ook Jeong, Katherine Magnuson, and Sakiko Tanaka for their help in preparing this review. We are ...

We propose the multicarrier on–off keying (MC-OOK) as a bandwidth-efficient modulation method for frequency-hopped multiple-access (FHMA) communications. The motivation for using MC-OOK is that a more bandwidth-efficient modulation scheme allows a larger number of frequency slots, and thus provides a higher immunity against multiple-access interference in FHMA systems. We analyze the average bi...

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Optimal signal energies are derived for optimal binary digital communication systems with arbitrary signal probabilities and correlation with both coherent and noncoherent detection. The resulting bit-error probability (BEP) is computed and compared with the BEP of the same systems with equal signal energies. One of the conclusions is that for the coherent system with nonegative correlation, an...

This paper addresses the uneven communication energy problem in data gathering sensor networks where the nodes closer to the sink tend to consume more energy than those of the farther nodes. Consequently, the lifetime of a network is significantly shortened. We propose a cross-sensor coding technique using On-Off keying which exploits (a) the tradeoff between delay and energy consumption and (b...