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Reply To: UMTS900 / GSM


Hi everyone, i’m looking for some information about UMTS900 & GSM frequency coordination.
I’m a french radio engineer working with GSM operators for 8 years (mainly Africa, and France).
I want to know where it is suitable to put the UMTS900 carrier in a EGSM spectrum.
I know there are some interference problems with GSM-R (EGSM low band). So is it better to put it in the mid-band (“sandwich”) or in the high band?
Next question: as a UMTS carrier is 5MHz band, what is the spectrum will i have to free, 5.4MHz or more or less?

Thanks a lot.