Pulse or digital communications – Pulse code modulation
Reexamination Certificate
2011-01-04
2011-01-04
Payne, David C (Department: 2611)
Pulse or digital communications
Pulse code modulation
C714S790000
Reexamination Certificate
active
07864869
ABSTRACT:
An approach for reliably communicating over a satellite in support of a communication service including, for example, as direct broadcast satellite and data service, is disclosed. An input message is encoded, yielding a structured Low Density Parity Check (LDPC) coded message. The coded message is modulated according to a high order modulation scheme that has a signal constellation representing more than two symbols per signaling point—e.g., 8-PSK (Phase Shift Keying) and 16-QAM (Quadrature Amplitude Modulation). The system includes a transmitter configured to propagate the modulated signal over the satellite. The above approach is particularly applicable to bandwidth constrained communication systems requiring high data rates.
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Eroz Mustafa
Fraley Dan
Lee Lin-nan
Sun Feng-Wen
DTVG Licensing, Inc.
Nguyen Leon-Viet Q
Payne David C
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