Listening to FM Radio in Software, Step by Step
We've walked through a fully functional but stripped-down multichannel FM receiver. We managed to turn a couple thousand dollars' worth of hardware into the equivalent of two $5 transistor radios, and we learned a bunch in the process. For those of you interested in pursuing FM listening, the GNU Radio code base includes a substantially higher fidelity FM receiver (hifi_fm.py), along with all kinds of other goodies.
Right now, a lot of interesting work is being done with GNU Radio. Some are focusing on mobile ad hoc networking, others on the legacy amateur radio waveforms, some on software GPS and another group is working on designing the next-generation ground-to-space amateur satellite communication system. Although the GNU Radio toolkit is mostly indifferent to I/O devices, most of these efforts are using or planning on using the USRP as the interface between the RF world and the PC.
Resources for this article: /article/7650.
Eric Blossom is the founder of the GNU Radio Project. Prior to his involvement with software radio, he spent many years in the secure phone business. When he's not hacking software radio, you're likely to find him practicing yoga or jujutsu. He can be reached at email@example.com.
Getting Started with DevOps - Including New Data on IT Performance from Puppet Labs 2015 State of DevOps Report
August 27, 2015
12:00 PM CDT
DevOps represents a profound change from the way most IT departments have traditionally worked: from siloed teams and high-anxiety releases to everyone collaborating on uneventful and more frequent releases of higher-quality code. It doesn't matter how large or small an organization is, or even whether it's historically slow moving or risk averse — there are ways to adopt DevOps sanely, and get measurable results in just weeks.
Free to Linux Journal readers.Register Now!
- Three More Lessons
- Django Models and Migrations
- August 2015 Issue of Linux Journal: Programming
- Hacking a Safe with Bash
- Secure Server Deployments in Hostile Territory, Part II
- The Controversy Behind Canonical's Intellectual Property Policy
- Huge Package Overhaul for Debian and Ubuntu
- Shashlik - a Tasty New Android Simulator
- Embed Linux in Monitoring and Control Systems
- General Relativity in Python