[sdiy] GFSK modulation and demodulation theory and practice info anyone?

[Magnus Danielson]

Hi folks!

I know there is a lot of people here dealing with all kinds of weird things, so
hopefully some people will have seen on a postcard what I am looking for.

Right now I am looking into to understand GFSK (Gaussian Frequency Shift
Keying) enought to build both modulators and demodulators. Especially the
demodulator is primary target since I want to be able to receive GFSK signals.
I am well beyond knowing it's FSK followed by a Gaussian filter, I want to
learn more deeply how design should be engineered and be able to understand
them.

If people have hands-on experience, have pointers to online references and/or
has material to pass along electronically I would be greatfull. Book and
article references isn't as great since access time is longer, hence my
preference.

I have been googling some and also digging into my collections of books, but
I still haven't got a good picture just yeat. Up to date radio-related theory
isn't strong on my bookshelfs just yeat.

Cheers,
Magnus