Re: Help regarding identification of modulation(GMSK) type of a signal

I guess Ravi is interested with received signal which was GMSK
modulated at transmission side - a typical mobile communication like
GSM or EDGE scenario.

The is related to something called "blind demodulation" where we do not
know in advance what received signal is coming - GMSK/8PSK etc.

I can not give detailed algorithm here. For example, a GSM burst
training sequence is known a prior. Someone can exploit correlation
property and calculate engery. If the engegy achieved through GMSK
correlation is high enough compared to that of others (say 8PSK) then
modulation type is GMSK.
Cheers
Santosh

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Relevant Pages

  • Re: Help regarding identification of modulation(GMSK) type of a signal
    ... modulated at transmission side - a typical mobile communication like GSM or EDGE scenario. ... If the engegy achieved through GMSK ... modulation type is GMSK. ... 8PSK is not used in FBs (frequency correction bursts). ...
    (comp.dsp)
  • Re: Help regarding identification of modulation(GMSK) type of a signal
    ... >> GSM or EDGE scenario. ... If the engegy achieved through GMSK ... >> modulation type is GMSK. ... > In the GSM case it's moot -- GSM includes a frequency correction burst ...
    (comp.dsp)
  • Re: GMSK modulation and its PSD
    ... I'm working on GMSK modem simulation in MATLAB. ... 1.calculated the impulse response of the GaussianLPF with the formula ... % paper called "Appendix D - Digital Modulation and GMSK" ... % truncation described in the Hull paper. ...
    (comp.dsp)
  • Re: GMSK modulation and its PSD
    ... I'm working on GMSK modem simulation in MATLAB. ... the modulation part albeit i'm not sure if the model I used is correct ... In many text books and technical papers the PSD of GMSK signal shows ... Your PSD calculation is a consequence of your bit pattern: ...
    (comp.dsp)
  • GMSK modulation and its PSD
    ... I'm working on GMSK modem simulation in MATLAB. ... the modulation part albeit i'm not sure if the model I used is ... In many text books and technical papers the PSD of GMSK signal shows ...
    (comp.dsp)