NFBM - Software decoder for narrow band FM with RTL-SDR
This is for experimentation and not ready for general use
NBFM is based on SoftFM which is a software-defined radio receiver for FM broadcast radio. It is written in C++ and uses RTL-SDR to interface with RTL2832-based hardware.
SoftFM Code has been modified
- modified to only do mono narrow-band FM demod
- use hard-coded IF sampling rate of 1.152MHz
- use hard-coded audio sample rate of 48kHz
- Thus a fixed downsampling ratio of 24 is used to go from IF -> Audio
- This is done in 1 stage using a spuce class 'decimator', which is then followed by a FM demod
see instructions for SoftFM
License
See files for Licensing.