Wireless GFSK interoperable with FSK

Go To Last Post
6 posts / 0 new
Author
Message
#1
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Is saying "GFSK" self-defining? Are there variations on the techniques to reduce occupied bandwidth?

Would this spectrum signature be such that a simple FSK receiver cannot demodulate a GFSK signal?

And vice-versa, GFSK receiver demodulating an FSK transmission?

(Assuming one can adjust/fiddle with the receiver bandwidth, modulation index, etc. for the FSK system but the GFSK system cannot be altered)

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

bump?

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Quote:
Is saying "GFSK" self-defining? Are there variations on the techniques to reduce occupied bandwidth?

The GFSK reduce the signal spectrum and not bandwidth...

Quote:
Would this spectrum signature be such that a simple FSK receiver cannot demodulate a GFSK signal?

I don't have experience on it, but seens that a FSK receiver can demodulate the GFSK...

Quote:
And vice-versa, GFSK receiver demodulating an FSK transmission?

Hummm... Good question.. I think soo, because the energy on the main frequencies of modulation will be on the signal, so the GFSK should demolute it...
Once that both operate on the same frequency to recognize 1 and 0...

Regards,

Bruno Muswieck

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

What is the BT of the Gauss filter? of bigger than about 0.4 it will work both ways (perhaps from 0.3).
The reason for using Gauss is that the fourier transform of a gsuss signal is a gauss signal, so the sidebands cansel each other out.(to some degree)

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

thanks ... "BT" is?

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

try to google somthing like GMSK BT then there will be some good hits (some will be for GFSK aswell) the G and BT part is the same for GMSK and GFSK.