Gqrx SDR receiver


Please visit the new Gqrx website. The information on this page is no longer updated!


Gqrx is a software defined radio receiver for Funcube Dongle (FCD), RTL2832U-based DVB-T devices (RTL-SDR), Universal Software Radio Peripherals (USRP) and Osmo SDR devices. It is powered by GNU Radio and the Qt GUI toolkit.

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First on the air tests of gqrx

With both the frequency controller and FFT plot widgets in place gqrx was ready for the first on the air tests. The video below shows the first reception of the AO-27 amateur radio satellite during orbit 92436 and 92437, using the Funcube Dongle receiver that I use for portable space communication.

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GQRX C++ Edition

About a week ago I resumed working on GQRX – an experimental AM/FM/SSB software receiver powered by GNU Radio and using Qt for user interface. This time, however, I am not going to continue working on the Python receiver but create a new receiver from scratch written in C++. It will support Funcube Dongle and USRP/UHD devices.

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Simple APT decoder prototype

I have wanted to implement a simple APT decoder for the NOAA weather satellites in GNU Radio for quite some time now, in particular since the USRP equipped with a TVRX or WBX daughterboard and a GNU Radio FM receiver can be an extremely good receiver for this purpose. Today I have spent some time looking at the details of decoding APT and actually ended up with a working prototype implemented using the GNU Radio Companion.

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Qthid 3.0 with full API support released!

Qthid 3.0 – the Qt-based controller application for the Funcube Dongle – has been released. This release includes support for the full control API available with the 18f firmware for the Funcube Dongle. This should cover all the functionality provided by the “fully functional windows front-end”.

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PRISM cubesat reception with Funcube Dongle and Arrow antenna

This is the sixth satellite reception of a series recorded on Monday, February 28, 2011 using the Funcube Dongle software defined radio receiver and the Arrow II hand-held satellite antenna. The satellite is the Japanese PRISM cubesat an the recording was made in JO45KG during orbit 11343.

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CUTE-1.7 + APD II reception with Funcube Dongle and Arrow antenna

This is the fifth satellite reception of a series recorded on Monday, February 28, 2011 using the Funcube Dongle software defined radio receiver and the Arrow II hand-held satellite antenna. The satellite is the CUTE-1.7 + APD II cubesat – also known as CO-65 – and the recording was made in JO45KG during orbit 15341.

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