[Discuss-gnuradio] Simple GMSK encoder and decoder with very large bandwidth

[Fred Castello]

Hi there,
My goal here is to ultimately develop a telemetry system but I am 
starting very simply by building a GMSK encoder using a file sync fed 
directly to a decoder.  It seems to be working as I can see the 
constellation diagram (which eventually goes away-dont know why) and on 
the scope sync I can see the phase transitions but in the FFT sync it 
appears that the bandwidth is huge.  From what I understand, I would not 
want to filter the results going from the modulator to the demodulator, 
but I may not understand that correctly.  I know I have a long way to 
go, but I am just trying to learn as I go and try to figure out the 
theory and see how it applies as I build using GNU radio.  Thank you 
anyone for your help!!  I am including the Flow Graph as well as the 
test file that I am using for the file sync. Much appreciated.
Fred

Transmit_Test_ver1.grc
Description: application/gnuradio-grc

transmit_test2
Description: Text document