WBFM Receive PLL

Hierarchical block for demodulating a broadcast FM signal.

The input is the downconverted complex baseband signal (gr_complex).

The output is the demodulated audio (float)

Compared to WBFM Receive, this one does a full stereo demodulation.

Parameters

Quadrature Rate

Input sample rate of complex baseband input. (float)

Audio Decimation

How much to decimate quad_rate to get to audio. (integer)

Deemphasis Tau

Deemphasis time constant (float) - typically 75e-6 (US) or 50e-6 (Europe)

Example Flowgraph

This flowgraph shows the stereo version of the WBFM receiver. The flowgraph file can be found in https://github.com/gnuradio/gnuradio/blob/master/gr-analog/examples/USRP_FM_stereo.grc

Source Files

Python files

[1]

Block definition

[2]