Since the functionality of the CCM version of the DVB-S2 transmitter is already included in GNU Radio, this OOT implements a VCM/ACM (Variable/Adaptive Coding and Modulation) version of the DVB-S2 transmitter. A VCM/ACM capable DVB-GSE block and test flow graph (dvbs2_txip.grc) are also included.

Copyright 2014,2016,2020 Ron Economos

This file is part of gr-dvbs2

gr-dvbs2 is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 3, or (at your option)

any later version.

gr-dvbs2 is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with gr-dvbs2; see the file COPYING. If not, write to

the Free Software Foundation, Inc., 51 Franklin Street,

Boston, MA 02110-1301, USA.

gr-dvbs2

Author: Ron Economos Email: w6rz@comcast.net

The goal of this project is to build a software-defined DVB-S2 transmitter, based on the EN 302 307 V1.3.1 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_302399/302307/01.03.01_60/en_302307v010301p.pdf

The baseband framing, baseband scrambling, LDPC (low density parity check), BCH (Bose, Chaudhuri, Hocquenghem), bit interleaver and physical layer framing and scrambling blocks are from G4GUO's DATV-Express Digital Amateur Television project datvexpress_gui (https://github.com/G4GUO/datvexpress_gui/tree/master/DVB-S2) and converted to GnuRadio 3.7.x.

A gnuradio-companion flowgraph (dvbs2_tx.grc) for the bladeRF and Ettus B2xx transmit capable SDR's is included.

A set of test Transport Streams that matches the example application symbol rate, constellations and code rates can be downloaded here:

http://www.w6rz.net/overflowqpsk_276_45.ts http://www.w6rz.net/sweetnothing8psk_184_56.ts http://www.w6rz.net/cosmic16apsk_138_89.ts

A DVB-S2 and DVB-S2X Transport Stream bit-rate calculator:

https://github.com/drmpeg/dtv-utils/blob/master/dvbs2rate.c

Note: This implementation supports the following DVB-S2 System configurations:

1) QPSK 1/4, 1/3, 2/5 2) QPSK 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10 3) 8PSK 3/5, 2/3, 3/4, 5/6, 8/9, 9/10 4) 16APSK 2/3, 3/4, 4/5, 5/6, 8/9, 9/10 5) 32APSK 3/4, 4/5, 5/6, 8/9, 9/10 6) CCM (Constant Coding and Modulation) 7) FECFRAME normal 64,800 bits 8) FECFRAME short 16,200 bits 9) Single Transport Stream 10) Roll-off 0.35, 0.25 and 0.20 11) VCM (Variable Coding and Modulation) 12) ACM (Adaptive Coding and Modulation) 13) Multiple Transport Streams 14) Multiple Generic Streams 15) Single Generic Stream 16) Dummy Frame Insertion

System configurations not supported are:

1) Input Stream Synchronizer 2) Null Packet Detection 3) Wide-band mode

Note: DVB-S2X Broadcast services MODCOD's have been tested as of September 2016 with the Silicon Labs Si2183 demodulator. VL-SNR modes have been implemented, but are still untested.

https://www.dvb.org/resources/public/standards/a83-2_dvb-s2x_den302307-2.pdf

Build instructions:

mkdir build
cd build
cmake ../
make
sudo make install
sudo ldconfig

Contributions are welcome!

drmpeg / gr-dvbs2

readme