Difference between revisions of "GFSK Demod"

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(Add example flowgraph for the GFSK Demod block)
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== Example Flowgraph ==
 
== Example Flowgraph ==
  
Insert description of flowgraph here, then show a screenshot of the flowgraph and the output if there is an interesting GUI. Currently we have no standard method of uploading the actual flowgraph to the wiki or git repo, unfortunately. The plan is to have an example flowgraph showing how the block might be used, for every block, and the flowgraphs will live in the git repo.
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The flowgraph below shows an example of the GFSK Mod and GFSK Demod blocks in action. We GFSK modulate 9-bit long bit stream '000111011', and then GFSK demodulate it. Then we compare the two bit streams to make sure that they are the same.
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[[File:Gfsk_mod_and_demod.png|800px]]
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When the flowgraph runs, we see that the red and blue signals are the same, meaning that the bit streams before and after the GFSK modulation and demodulation are the same.
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[[File:Gfsk_mod_and_demod_in_action.png|800px]]
  
 
== Source Files ==
 
== Source Files ==

Revision as of 14:51, 21 July 2021

Hierarchical block for Gaussian Minimum Shift Key (GFSK) demodulation.

The input is the complex modulated signal at baseband.

The output is a stream of bits packed 1 bit per byte (the LSB)

Parameters

Samples/Symbol
Samples per baud >= 2 (integer)
Sensitivity
Given to the Quadrature Demod
Gain Mu
Controls rate of mu adjustment
Mu
Fractional delay [0.0, 1.0]
Omega Relative Limit
Sets max variation in omega (float, typically 0.000200 (200 ppm))
Freq Error
Bit rate error as a fraction
Verbose
Print information about modulator?
Log
Print modualtion data to files? (bool)

Example Flowgraph

The flowgraph below shows an example of the GFSK Mod and GFSK Demod blocks in action. We GFSK modulate 9-bit long bit stream '000111011', and then GFSK demodulate it. Then we compare the two bit streams to make sure that they are the same.

Gfsk mod and demod.png

When the flowgraph runs, we see that the red and blue signals are the same, meaning that the bit streams before and after the GFSK modulation and demodulation are the same.

Gfsk mod and demod in action.png

Source Files

Python files
[1]
Block definition
[2]