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GMSK modulation
Case of frequency correction burst
Solving modulation equations
One bit change
Normal duration burst



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Example of 1 bit change

Example of 1 bit change [Under GSM > GMSK modulation]

Let us take a simple example of one bit change i.e. (differential) encoded as (+1, -1). The carrier waveform is illustrated below:

1bitchange.png

So, in a way, the effect of bit change is seen for 3 symbol duration ! This complete short discussion on GSM GMSK modulation. With this technique of 1) solve 2) plot and 3) study, reader can further explore other modulations and gain very useful insights into technologies.


About plots

All the plots were drawn with gnuplot. Please find the script and related data files at Let us discuss Telecom.

References: GSM book by Mouly and Pautet.

© Copyright Samir Amberkar 2013

Solving modulation equations « GSM Index .