# GFSK Mod/Demod block

**URL:** <https://www.ruby-forum.com/t/gfsk-mod-demod-block/210070>\
**Category:** GNU Radio\
**Created:** [July 29, 2011, 5:04pm UTC](https://www.ruby-forum.com/t/gfsk-mod-demod-block/210070 "2011-07-29T17:04:41Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![luislavena](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/0ea827/32.png) [@luislavena](https://www.ruby-forum.com/u/luislavena)\
**Post date:** [July 29, 2011, 5:04pm UTC](https://www.ruby-forum.com/t/gfsk-mod-demod-block/210070/1 "2011-07-29T17:04:41Z")

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Hi!

Short question: is anybody aware of GFSK mod or demod block in  
Gnuradio, or a Flowgraph using it?

Best,  
Marius

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**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [July 31, 2011, 11:37pm UTC](https://www.ruby-forum.com/t/gfsk-mod-demod-block/210070/2 "2011-07-31T23:37:14Z")

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On Fri, Jul 29, 2011 at 11:03 AM, Marius [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
wrote:

> Hi!
> 
> Short question: is anybody aware of GFSK mod or demod block in  
> Gnuradio, or a Flowgraph using it?
> 
> Best,  
> Marius

There is a GMSK block, which should be what you want. It should be  
trivial to go from MSK to non-minimum FSK.

Tom