GRCon2012 call for papers

The 2012 GNU Radio Conference will be held September 24-27, 2012, at the Sheraton Gateway Hotel near the Altanta, GA airport. The conference coordinators have posted a “call for papers” from prospective presenters. Visit this link to fill out and submit the form with your idea for a presentation. The deadline for submission of abstracts […]

Receiving Oregon Scientific sensors with RTL-SDR

Kevin Mehall got his RTL-SDR dongle and wasted no time in developing a decoder using GNU Radio for the 433MHz transmissions of Oregon Scientific remote temperature sensors (v1 protocol). These devices transmit on 433.9 MHz sending data packets containing the temperature data every 30 seconds. The transmitter uses On-off keying and the 32 data bits […]

Dongle Shootout: Funcube vs RTL SDR

Kanal von MegaOscarVideos from Germany presents a two-part video comparision of the Funcube dongle and a RTL-SDR DVB-T dongle, in this case a Hama Nano version. The two devices are connected to the same antenna and using identical test systems from a geostationary INMARSAT satellite to compare received signal to noise ratios (SNR).

Lessons learned with an external clock / USRP1 interface

In order to use even a high-priced SDR for GSM experimentation, an accurate clock source is indispensable. According to the GSM standard, a clock with “absolute accuracy better than 0.05 ppm for both RF frequency generation and clocking the timebase” is required. This means that with a standard USRP1 with frequency accuracy of 2.5 ppm, […]

DCC 2011: FUNCube project development

The FUNcube Dongle is a SDR receiver on a USB dongle which currently sells for $125 GPB. It uses the same E4000 tuner found in the $20 RTL-SDR dongle we’ve posted about previously. The developer is Howard Long, G6VLB, who chronicled the FUNCube’s development in the above video from the 2011 Digital Communications Conference hosted […]

RTL-SDR APCO Project 25 (P25) receiver

Balint Seeber has done it again! In this video he shows how to take the RTL-SDR dongle and use it in conjunction with the open source OP25 project to successfully demodulate APCO Project 25 (P25) digital radio voice communications. P25 is a term used to refer to a modulation system used by many public safety […]