Abstract
4G networks are on the way but operators still thinking about 3G as they decide. The interesting thing is that the technologies are, in a broad-brush way. The 4G networks would use some form of orthogonal frequency-division multiplexing (OFDM) - the same basic technology as that used in Wi-Fi wireless networks and ADSL for wired access to the Internet. As with 3G, vendors and operators are not aligning behind a single standard but are choosing to slug it out with similar but competing protocols. This time around, there are again three candidates for the wireless operators to choose from. However, observers do not give Qualcomm's successor to CDMA2000 much chance of success. Operators who were expected to stick with Qualcomm because they have CDMA2000 networks today have instead opted to go with the successor to W-CDMA or the wild card of WiMax.
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