Gqrx is a graphical software defined radio receiver powered by GNU Radio and the Qt toolkit. It combines conventional receiver controls with spectrum and waterfall displays, making it suitable for listening, scanning and general examination of radio signals.
Hardware support is provided through the GNU Radio ecosystem, giving Gqrx access to a broad range of SDR receivers. It can also work with recorded baseband data, while network interfaces allow other programs to control the receiver or consume its audio.
This is free and open source software.
Key Features
- Discovers compatible SDR devices connected to the system.
- Processes complex I/Q sample streams from supported receivers.
- Supports AM, synchronous AM, SSB, CW, narrow FM and wide FM reception.
- Wide FM supports stereo broadcast reception and RDS information.
- Provides frequency, gain and I/Q correction controls.
- Variable receiver filters allow the passband to be adjusted to the signal.
- Includes automatic gain control, squelch and noise blanking.
- Real-time FFT spectrum and waterfall displays.
- Can operate as a spectrum analyser with normal demodulation disabled.
- Records and plays back demodulated audio.
- Records and plays back raw I/Q baseband data.
- I/Q recording can be started and stopped through the remote-control interface.
- TCP remote control supports multiple simultaneous connections.
- Remote clients can retrieve RDS information and control audio muting.
- Streams demodulated audio over UDP for use by other applications.
Website: github.com/gqrx-sdr/gqrx
Support:
Developer: Alexandru Csete
License: GNU General Public License v3.0
Gqrx is written in C++. Learn C++ with our recommended free books and free tutorials.
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