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A QAM-64 transmitter for GNU Radio
License: GNU General Public License v3.0
This project forked from argilo/gr-qam
A QAM-64 transmitter for GNU Radio
License: GNU General Public License v3.0
# Copyright 2014 Clayton Smith # # This file is part of gr-qam # # gr-qam 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-qam 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-qam; see the file COPYING. If not, write to # the Free Software Foundation, Inc., 51 Franklin Street, # Boston, MA 02110-1301, USA. gr-qam ====== Author: Clayton Smith Email: <[email protected]> The goal of thhis project is to build a software-defined 64-QAM and 256-QAM transmitter, based on the ANSI/SCTE 07 2013 Digital Transmission Standard for Cable Television: http://www.scte.org/FileDownload.aspx?A=3445 Build instructions: mkdir build cd build cmake ../ make sudo make install sudo ldconfig If your GNU Radio is installed in /usr (rather than /usr/local), then replace the third line above with: cmake -DCMAKE_INSTALL_PREFIX=/usr ../ You may also need to export the PKG_CONFIG_PATH environment variable for cmake to find your GNU Radio libraries. For example, if you had installed into /opt/gnuradio, you may need to have PKG_CONFIG_PATH set to "/opt/gnuradio/lib/pkgconfig" or "/opt/gnuradio/lib64/pkgconfig". At present only 64-QAM is supported. An example transmitter can be found in /apps. It can transmit MPEG transport streams generated by avconv. For example, to transmit the video from your webcam and audio from your microphone, try this: mkfifo in.fifo avconv -f alsa -i pulse -f video4linux2 -s 640x480 -i /dev/video0 \ -vcodec mpeg2video -s 640x480 -r 60 -b 5000000 -acodec ac3 \ -ar 48000 -ab 192000 -ac 2 -muxrate 26970352 -mpegts_service_id 1 \ -f mpegts -y in.fifo Contributions are welcome!
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