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:
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. For the script and related data files, please drop me a mail at samir.s.amberkar@gmail.com.
References: GSM book by Mouly and Pautet.
© Copyright Samir Amberkar 2013
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