This page provides an overview of the various projects and experiments I am or have been doing with GNU Radio and the Universal Software Radio Peripheral (USRP). GNU Radio is a free, open source software development toolkit that provides the signal processing runtime and processing blocks to implement software defined radio. The USRP provides a flexible and cost efficient hardware platform that can be used with GNU Radio to convert the digital data to radio frequencies and vice versa. The USRP and various RF daughterboards, covering most of the DC to 6 GHz spectrum, can be purchased from Ettus Research. Schematics and firmware sources are available under open source license.
My projects with GNU Radio and the USRP are in the field of amateur radio and space communications. The idea is to achieve a broad range of functionality by using different hardware and software configurations. For example, using the same hardware I can switch between narrow band voice communications (SSB/FM) and digital high definition video broadcast using 8 MHz bandwidth by simply switching the signal processing software.
- Gnu Radio Companion Examples
- Gqrx AM, FM, SSB, AFSK, BPSK receiver powered by GNU Radio and Qt
- Simple DVB setup
More GNU Radio / USRP hardware and software projects will be added as they become available. You can also follow my GNU Radio blog if you want to keep up to date with my work in this area (dedicated RSS or Atom feeds available), or you can view the complete blog archive.
Live sessions are broadcast via Ustream – watch this page or the channel page on Ustream.
I hope these projects demonstrate the power of open source hardware and software.