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Of Profiles, Levels, and Forests
Published in S. Merrill Weiss, Issues in Advanced Television Technology, 1996
QAM (Quadrature Amplitude Modulation) is probably the front-runner as the choice for virtually all applications other than broadcast and satellite. QAM comes in varieties with 16, 32, 64, and 256 points in their constellations. These represent 4, 5, 6, and 8 bits per symbol and can carry on the order of 16, 21, 27, and 37 Mb/s in a 6 MHz channel. It can also be used in much narrower channels at lower data rates. This can allow single-channel-per-carrier (SCPC) operation through satellites or video transmission over copper pairs. Exactly what all these numbers are depends on choices made for error correction overheads, use of trellis coding, and the like.
From launch to transmission: satellite communication theory and SNG
Published in Jonathan Higgins, Satellite Newsgathering, 2012
The HPA can be operated near maximum power (termed ‘saturation’) when a single signal is being uplinked. This mode of operation is termed ‘single channel per carrier’ (SCPC). If there are multiple carriers being combined and uplinked, this is termed ‘multiple carriers per channel’ (MCPC). A larger amount of input back-off is always required in MCPC operation.
A Survey of National Disaster Communication Systems and Spectrum Allocation - an Indian Perspective
Published in IETE Technical Review, 2020
Shrayan Das, Kirtan Gopal Panda, Debarati Sen, Wasim Arif
Lower bandwidth requirement allows DMS User Nodes to use low-cost Time Division Multiplexing / Time Division Multiple Access (TDM/TDMA) technologies. This also facilitates bandwidth sharing among User Nodes. In the case of Primary nodes, Single Channel per Carrier (SCPC) is used due to higher bandwidth requirement and dedicated point-to-point connectivity.