Simple Squelch

From GNU Radio
Jump to navigation Jump to search

Simple squelch block based on average signal power and threshold in dB. The output equals the input if the average input is >= the threshold, and zero otherwise.

The average is computed using a Single Pole IIR filter. It uses the magnitude squared for both averaging and for comparing to the threshold.

Parameters[edit]

(R): Run-time adjustable

Threshold (R)
Threshold for muting.
Alpha
Gain parameter for the running average filter.

Example Flowgraph[edit]

This flowgraph shows a Simple Squelch block in a working 2 meter receiver.

FunCube 2 meter NB FM fg.png

Source Files[edit]

C++ files
simple_squelch_cc_impl.cc
Header files
simple_squelch_cc_impl.h
Public header files
TODO
Block definition
analog_simple_squelch_cc.block.yml