High spectral efficient and flexible next generation mobile communications

Authors

Simon Plass, Stephan Sand, Mikael Sternad, and Arne Svensson

Reference

Wireless Personal Communications, Oct. 2007

DOI: 10.1007/s11277-007-9392-y

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Abstract

In this article we identify and describe the requirements and challenges of next generation mobile communications systems. The so-called fourth generation (4G) aims at throughput rates of more than 100 MBit/s outdoors with high mobility and 1GBit/s indoors. This requires new advanced techniques in the air interface of such a system. We outline new possible techniques and introduce a future basic physical layer concept. The adaptivity to the channel of all the modules in such a possible concept is highlighted. Since the needed large bandwidth for high data rates is a very valuable resource, future communications systems need a high spectrum flexibility. Furthermore, 4G systems will face severe inter-cell interference scenarios that have to be tackled. Both challenges, i.e., spectrum flexibility and inter-cell interference, are discussed in more detail.

Keywords

OFDM - Next generation - 4G - Spectrum flexibility

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