SDR. GNU Radio - WikiStart - gnuradio.org. A Software Defined Radio in C# - Nightly. Rtl-sdr – OsmoSDR - Nightly. DVB-T dongles based on the Realtek RTL2832U can be used as a cheap SDR, since the chip allows transferring the raw I/Q samples to the host, which is officially used for DAB/DAB+/FM demodulation.
The possibility of this has been discovered by Eric Fry (History and Discovery of RTLSDR). Antti Palosaari has not been involved in development of rtl-sdr. Specifications ¶ The RTL2832U outputs 8-bit I/Q-samples, and the highest theoretically possible sample-rate is 3.2 MS/s, however, the highest sample-rate without lost samples that has been tested so far is 2.56 MS/s. Amateur Radio Projects and Software Defined Radio Forums.