Tutorial: Creating an FM Receiver in GNURADIO using an RTL-SDR source

Over on instructables.com, user v3l0c1r4pt0r has created an instructable that shows step by step instructions on how to create an FM receiver in GNU Radio using an RTL-SDR and GNU Radio Companion. His instructable explains a bit about the theory of what is required to decode an FM signal, and shows which GNU Radio blocks are required, and how to connect them up.

GNU Radio Tutorial
GNU Radio FM Receiver

5 comments

  1. Guillermo Bartolomé Herrador

    First question:

    I have managed to make the system without problem. My question is regarding the block multiply constant.
    If we do not insert this block, the signal will be received with more noise than if it is
    What is this about?

    Second question:

    Why is the cutoff frequency 100 KHz in the low pass filter?
    How can we estimate this parameter more accurately??

  2. roestzwiee

    Did all that stuff with a virtual machine on vmware. Worked fine, but sometimes the audio sink is running low and it prints me some aU. Probably an issue with th vm. Thanks!

  3. Evan

    Went through these steps today with great success. The hardest part was actually getting GNURadio-Companion to run on OSX.

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