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DesignGuide -> RF System -> Communication Ex

Question asked by lievrepa on Sep 19, 2008

I am a new user of ADS. I want to design an architecture for a GMSK transceiver. To begin and understand how ADS works, I am looking at design examples.

I have a question concerning one of them. This one:
DesignGuide -> RF System -> Communication Examples -> GSM System.

When I increase the simulation time (increase Tstop), I do not understand why the BER is not about the same as before. After some time (for example putting Tstop=15000), the received signal doesn't correspond at all with the input signal and the BER is converging to 0.5. Do you have any clue how to solve this issue?

Thank you and best regards,