PLL Carrier Regeneration

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Implements a PLL which locks to the input frequency and outputs a carrier.

This PLL locks onto a [possibly noisy] reference carrier on the input and outputs a clean version which is phase and frequency aligned to it.


(R): Run-time adjustable

Loop bandwidth (R)
The loop bandwidth determines the lock range and should be set around pi/200 2pi/100.
Max freq
Maximum frequency of the carrier in radians per sample
Min freq
Minimum frequency of the carrier in radians per sample

Example Flowgraph

This flowgraph implements a Broadcast FM stereo receiver using basic blocks. The PLL captures the 19kHz pilot carrier.

USRP FM stereo fg.png

Source Files

C++ files
Header files
Public header files
Block definition