Backward compatible DVB-S standard transmission system

Details Backward compatible DVB-S standard transmission system Backward compatible DVB-S standard transmission system

2008-01-01

2008-01-01

Payne, David C. (Department: 2611)

Pulse or digital communications

Transmitters

Angle modulation

C375S295000, C375S302000

Reexamination Certificate

active

07315582

ABSTRACT:
The invention relates to digital transmissions. It particularly relates to a new transmission system (DVB-S2), which is backward compatible with a primary transmission system (DVB-S), enabling a receiver of the primary system to receive signals transmitted by a transmitter of the new transmission system. The principle of the invention is based on using a hybrid QPSK/Non-Uniform 8-PSK modulation. The hybrid modulation is specified by a periodic binary pattern indicating, for each symbol, which modulation is used.

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A. Morello and V. Mignone, entitled “Backward compatible solutions for DVB-S2”, DVB Technical module, TM2638. pp. 1-10, Feb. 2002.

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