gr-dvbs2rx is a GNU Radio out-of-tree (OOT) module with full DVB-S2 transmitter and receiver implementations for software-defined radio (SDR).

For the receiver side, this project includes a shared library with the essential signal processing blocks to process a stream of input IQ samples and recover an MPEG transport stream (TS) on the output. The processing blocks include the physical layer (PL) synchronization stages (frame timing, symbol timing, carrier frequency, and phase recovery), forward error correction (FEC) blocks, and baseband frame (BBFRAME) processing. These blocks are wired together in the dvbs2-rx application and within the example GNU Radio flowgraphs.

Additionally, the project provides the dvbs2-tx transmitter application. While this OOT module focuses on the Rx signal processing blocks, the Tx blocks are taken directly from the gr-dtv in-tree GNU Radio module for digital TV. Like the Rx application, the dvbs2-tx application wires the Tx processing blocks together while offering a flexible user interface.

Both the Tx and Rx applications are highly customizable through command-line options. The options are further detailed in the usage section. They include, for instance, customization of the MODCOD, frame size, PL pilots, roll-off factor, and much more.

This repository is a fork of drmpeg's gr-dvbs2rx project, including the BCH decoder from aicodix/code and the SIMD-accelerated LDPC decoder from xdsopl/LDPC. In particular, this fork extends drmpeg/gr-dvbs2rx primarily by adding the physical layer blocks required for a fully-fledged receiver, as well as the flexible dvbs2-tx and dvbs2-rx applications.

This project is licensed under GPLv3, and it was developed primarily for non-commercial research, experimentation, and educational purposes. Please feel free to contribute or get in touch to request features or report any problems.

• Supported operation modes and limitations.
• Installation instructions.
• Usage instructions.

• Ahmet Inan
• Igor Freire
• Ron Economos