Authors: Sundar Kannan
Third-generation (3G) mobile networks face a newrival: so-called 4G. And, astonishingly, the new networks mayeven be profitable. Alvin Toffler, an eminent futurologist, oncesaid, “THE FUTURE ALWAYS COMES TOO FAST, BUT INTHE WRONG ORDER”. The state of wireless telecoms is aclassic example. Even as 3G mobile networks are being switchedon around the world, a couple of years later than planned,attention is shifting to what comes next: a group of newertechnologies that are, inevitably, being called Fourth GenerationMobile Networks (4G). 4G is all about an integrated, globalnetwork that's based on an open systems approach.The goal of 4G is to replace the current proliferation of corecellular networks with a single worldwide cellular core networkstandard based on IP for control, video, packet data, and VoIP.This integrated 4G mobile system provides wireless usersaffordable broadband mobile access solutions for the applicationsof secured wireless mobile Internet services with value-addedQoS. This paper gives the reasons for the evolution of 4G, though3G has not deployed completely. And then gives the informationon the structure of the transceiver for 4G followed by themodulation techniques needed for the 4G. Later this gives theinformation about the 4G processing .Finally concludes withfuturistic views for the quick emergence of this emergingtechnology.
Keywords: 4G; QoS;OFDM;FFT;DSP;SNR