Editing GNU Radio (section)

==Overview==
[[File:GNU Radio Qt GUI Plots Screenshot.png|thumb|350px|right|GNU Radio plotting demodulated radio samples.]]
The GNU Radio software provides the framework and tools to build and run software radio or just general signal-processing applications. The GNU Radio applications themselves are generally known as "flowgraphs", which are a series of signal processing blocks connected together, thus describing a data flow.

As with all [[software-defined radio]] systems, reconfigurability is a key feature. Instead of using different radios designed for specific but disparate purposes, a single, general-purpose, radio can be used as the radio front-end, and the signal-processing software (here, GNU Radio), handles the processing specific to the radio application.

These flowgraphs can be written in either [[C++]] or [[Python (programming language)|Python]]. The GNU Radio infrastructure is written entirely in C++, and many of the user tools (such as GNU Radio Companion) are written in Python.

GNU Radio is a [[signal processing]] package and part of the [[GNU Project]]. It is distributed under the terms of the [[GNU General Public License]] (GPL), and most of the project code is copyrighted by the [[Free Software Foundation]].<ref>{{Cite web |url=http://gnuradio.org/redmine/projects/gnuradio/wiki/WhatIsGR#How-is-GNU-Radio-licensed |title="How is GNU Radio licensed?" |access-date=2016-03-31 |archive-url=https://web.archive.org/web/20161204030830/http://gnuradio.org/redmine/projects/gnuradio/wiki/WhatIsGR#How-is-GNU-Radio-licensed |archive-date=2016-12-04 |url-status=dead}}</ref>