https://github.com/argilo/gr-queue

GNU Radio queue block, useful for trunked radio systems
https://github.com/argilo/gr-queue

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GNU Radio queue block, useful for trunked radio systems

• Host: GitHub
• URL: https://github.com/argilo/gr-queue
• Owner: argilo
• License: gpl-3.0
• Created: 2012-07-11T16:48:09.000Z (almost 14 years ago)
• Default Branch: master
• Last Pushed: 2024-01-30T16:05:09.000Z (over 2 years ago)
• Last Synced: 2025-06-21T23:05:01.486Z (about 1 year ago)
• Topics: hacktoberfest
• Language: CMake
• Homepage:
• Size: 121 KB
• Stars: 11
• Watchers: 4
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: COPYING

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README

          
gr-queue

========

Author: Clayton Smith  

Email: 

When using GNU Radio to listen to trunked radio systems, one problem

that comes up is that multiple channels may be transmitting at once, in

which case you will hear multiple voices over top of each other if you

combine the channels with an Add block.  This block solves that problem

by queueing transmissions so they play back one after the other.

Whenever a non-zero sample arrives on any channel, that channel will be

considered active and its samples will start flowing through to the

output.  If non-zero samples start to arrive on other channels, they

will be queued for playback once the first channel returns to zero.

The block will consider a transmission finished once it receives a

number of consecutive zero samples on an active channel.  This number

is configurable, with the default being 4000.

Transmissions are played back in order of when they began.

Since the block uses zeros to determine whether a channel is active or

not, it is important to squelch the inputs to this block.

Build instructions:

    cmake .

    make

    sudo make install

    sudo ldconfig

After running the above commands, "Queue" should appear under the

"Operators" category in GNU Radio Companion, and "queue_ff" will be

available in the "argilo" Python package.

Contributions are welcome!