This project implements a software-defined DVB-S2 transmitter, based on the EN 302 307 V1.4.1 Second Generation framing structure, channel coding and modulation systems for Broadcasting, Interactive Services, New Gathering and other broadband satellite applications standard:
http://www.etsi.org/deliver/etsi_en/302300_302399/30230701/01.04.01_60/en_30230701v010401p.pdf
The project also provides experimental support for the new DVB-S2X extensions.
http://www.etsi.org/deliver/etsi_en/302300_302399/30230702/01.01.01_20/en_30230702v010101a.pdf