[Lowfer] MSK Question

[n8tl]

If you have tried to decode these MSK signals, what are you using to do it?
I know they have the text encrypted,but, I would like to see something on the
screen.

Thanks,

Tom N8TL
 

On Sun, 13 Mar 2011 16:23:26 -0400
"David L. Wilson" <dwilson314 at verizon.net> wrote:

> Also, the experimental high accuracy DGPS signals like from Hagerstown
> (actually Lappans), MD are said to be cosine filtered MSK (the DGPS around
> 300 MHz is not).  It has an odd sound with regular "burps" which causes the
> spectrum to have peaks over the shape every 167 Hz.   I think that may be
> due to the data content rather than the form of the filtering but really do
> not know.  But then the regular DPGS (both 100 Bd and 200 Bd) around 300 kHz
> have their oddity of peaks riding the top of the high peak.
> 
> --
> David L. Wilson
> dwilson314 at verizon.net
> 
> 
> > -----Original Message-----
> > From: lowfer-bounces at mailman.qth.net [mailto:lowfer-
> > bounces at mailman.qth.net] On Behalf Of n8tl
> > Sent: Sunday, March 13, 2011 3:05 PM
> > To: lowfer at mailman.qth.net
> > Subject: Re: [Lowfer] MSK Question
> > 
> > David...thanks for the info...Tom N8TL
> > 
> > On Sun, 13 Mar 2011 09:00:30 -0400
> > "David L. Wilson" <dwilson314 at verizon.net> wrote:
> > 
> > > I think it looks like straight MSK from what I have read and in cases
> > > I have checked, the spectrum of the audio matched simulations of
> straight
> > MSK.
> > > Ref.
> > >
> > > [PPT] Introduction to GMSK: Gaussian Filtered Minimum Shift Keying
> > > File
> > > Format: Microsoft Powerpoint - Quick View GMSK or Gaussian-filtered
> > > Minimum Shift Keying differs from MSK in that a Gaussian Filter of an
> > > appropriate bandwidth is used before the modulation stage. ...
> > > www.eecs.tufts.edu/~gcolan01/Course_Work/Intro_to_GMSK.ppt
> > > --
> > > David L. Wilson
> > > dwilson314 at verizon.net
> > >
> > >
> > > > -----Original Message-----
> > > > From: lowfer-bounces at mailman.qth.net [mailto:lowfer-
> > > > bounces at mailman.qth.net] On Behalf Of n8tl
> > > > Sent: Sunday, March 13, 2011 8:06 AM
> > > > To: lowfer
> > > > Subject: [Lowfer] MSK Question
> > > >
> > > >
> > > > A quick question....is the MSK we hear on VLF 5-30 Khz straight MSK
> > > > or is
> > > it
> > > > > Gaussian Filtered MSK???
> > > >
> > > > Thanks, and regards,
> > > >
> > > > Tom N8TL
> > > >
> > > > --
> > > > n8tl <n8tl at woh.rr.com>
> > > >
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> > --
> > n8tl <n8tl at woh.rr.com>
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-- 
n8tl <n8tl at woh.rr.com>