What is the difference between LTE system and GSM system ?

LTE is4G, while GSM is2 or2.5G. LTE uses access technology called OFDMA and SC-FDMA while GSM uses FDM. Speedwise, LTE can reach over1G in LTE advanced while GSM borders on below1Mbps.

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LTE is using advanced antenna & coding technology for air-interface.

LTE is using advanced radio access technology like OFDM/Channel structure.

LTE is using simplified network architecture compare to GSM.

LTE is completely IP based and employs only packet switching technology for complete system.

GSM and CDMA are two of the major networks used in the United States. LTE (Long Term Evolution) refers to a standard for very high-speed data (like4G and3G.) The Global System for Mobile Communication (GSM) network is used by AT&T and T-Mobile in the US. They are normally best for people who travel internationally often. Code division multiple access (CDMA) network is the base for networks such as IS-95, CDMA2000, etc. It is used on a lot of radio communications technologies. (GSM carriers actually use WCDMA, a type of CDMA, for3G data) It is used on Sprint and Verizon in the US. You have the Galaxy Nexus, which is on Verizon. It is a CDMA phone and has4G LTE (which makes it a fast phone internet wise!