Towards THz Communications - Status in Research, Standardization and Regulation
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Towards THz Communications - Status in Research, Standardization and Regulation Thomas Kürner & Sebastian Priebe
Received: 30 April 2013 / Accepted: 29 July 2013 / Published online: 25 August 2013 # Springer Science+Business Media New York 2013
Abstract In the most recent years, wireless communication networks have been facing a rapidly increasing demand for mobile traffic along with the evolvement of applications that require data rates of several 10s of Gbit/s. In order to enable the transmission of such high data rates, two approaches are possible in principle. The first one is aiming at systems operating with moderate bandwidths at 60 GHz, for example, where 7 GHz spectrum is dedicated to mobile services worldwide. However, in order to reach the targeted date rates, systems with high spectral efficiencies beyond 10 bit/s/Hz have to be developed, which will be very challenging. A second approach adopts moderate spectral efficiencies and requires ultra high bandwidths beyond 20 GHz. Such an amount of unregulated spectrum can be identified only in the THz frequency range, i.e. beyond 300 GHz. Systems operated at those frequencies are referred to as THz communication systems. The technology enabling small integrated transceivers with highly directive, steerable antennas becomes the key challenges at THz frequencies in face of the very high path losses. This paper gives an overview over THz communications, summarizing current research projects, spectrum regulations and ongoing standardization activities. Keywords THz communications . THz channel modeling . regulation . standardization
1 Introduction The emergence of applications requiring wireless data rates of several 10s of Gbit/s [1] in combination with the general trend of a fast increasing demand of mobile traffic [2] motivates the need for either more spectrum-efficient transmission technologies or for more spectrum - or even both. A depiction of the evolution of data rates achieved by wireless system – known as Edholm’s law of data rates - has been published first in [3] and updated in [4], see Figure 1. Under the assumption that the same trend will be observed in the future, it is obvious that around the year 2020 wireles data rates of around 100 Gbit/s will be achieved. Within the spectrum currently allocated to mobile services, the largest connected band can be found around 60 GHz, where a bandwidth of 7 GHz is globally available. There, T. Kürner (*) : S. Priebe Institut für Nachrichtentechnik, THz Communications Lab, Technische Universität Braunschweig, Schleinitzstr. 22, 38092 Braunschweig, Germany e-mail: [email protected]
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J Infrared Milli Terahz Waves (2014) 35:53–62
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