Mobile communications
GSM, cdmaOne and 3G Systems
GSM: Switching, Services and Protocols
GSM: Switching, Services and Protocols
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GSM mobile system like other communication systems has the frequency band used in the systems depends on the type of the GSM system, cellular system means dividing the area region the system installed in it in to many cells, each cell and each channel must has it's own frequency, so the frequency planning is very important to the future of the system installed because of continuously expanding the area of each city and increasing the users of GSM system, the frequency band for the system is limited, so it must be taken account the number of frequencies using, in this paper, frequency planning before installing the system has been studied and the advantages of this process for system future installed in that area.