"Personal Communication System"...

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Frequency Hopping in GSM– When multipath fading is a problem, the GSM systemallows for frequency hopping, a type of spreadspectrumcommunication.– The system can hope only among the frequencies thatare assigned to the cell, so there will be only a fewhopping possibilities (on the order of three frequencies)– Thus GSM is not really a true spread-spectrum system,but rather a TDM/FDM system with some spreadspectrumcapability added on. This feature is unique toGSM; IS-136 TDMA has nothing like it.
Subscriber ID Module– The subscriber ID module (SIM) is unique to theGSM system. It is a smart card with eight kilobytes ofmemory that can be plugged into any GSM phone.– The SIM contains all subscriber information includingtelephone number (called the International MobileSubscriber Identification (IMIS) in GSM), a list ofnetworks and countries where the user is entitled toservice, and other user-specified information such asmemories and speed dial numbers.– The SIM also offers some protection against fraudulentuse. A GSM phone is useless without a SIM; if the userremoves the card when leaving the phone in a car, forexample, the phone cannot be used unless the thief hasa valid SIM.
Page 3 and 4: • Frequency Range- The broadband
Page 6: • Coverage- The coverage for any
Page 11 and 12: GSM• GSM is the system used in Eu
Page 13 and 14: - Figure 11.2 shows the structure o
Page 15: Voice transmission- Each voice tran
Page 19 and 20: i-mode mobile communication [2]- i-
Page 21 and 22: • i-mode packetscommunication [2]
Page 23 and 24: • Graphics [2]
Page 25: References• [1] R. Blake, "wirele

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