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Introducing RTL-SDR

Added by laforge almost 6 years ago

While the OsmoSDR is still not available, some Osmocom team members (notably Steve Markgraf) have been hacking away on an alternative least-cost solution: rtl-sdr.

So what is rtl-sdr? It is a creative form of using consumer-grade DVB-T USB receivers, turning them into fully-fledged software defined radios.

Those DVB-T receivers supported by rtl-sdr are based on the Realtek RTL2832U chipset plus a tuner IC like the Elonics E4000.

The RTL2832U has some undocumented commands/registers, by which it can be placed into a mode where it simply forwards the unprocessed raw baseband samples (up to 2.8 MS/s 8-bit I+Q) via high-speed USB into the PC, where they are routed into gnuradio.

At a street price of about USD 20 to USD 25, they are undoubtedly the most capable low-cost SDR hardware that can be bought. So now there is really no more excuse for anyone to not learn gnuradio. You don't have to buy a USRP, not even a FCDP or an OsmoSDR: A USD 20 device is all that's needed for receiving signals like GSM, GMR, DECT, TETRA, APCO25 and many others.


Comments

Added by DinaHaines 16 days ago

Informative post with good and deep insights, I totally consents with you. appreciate your efforts which you made to write this article. Thanks a lot!!!
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