Above-90GHz Spectrum and Single-Carrier Waveform as Enablers for Efficient Tbit/s Wireless Communications

Abstract : —The radio spectrum above 90GHz offers opportunities for huge signal bandwidths, and thus unprecedented increase in the wireless network capacity, beyond the performance defined for the 5G technology. This spectrum is essentially exploited for scientific services, but attracts nowadays many interest within the wireless telecommunications research community, following the same trend as in previous network generations. The BRAVE project that was launched at early 2018, aims at the elaboration of new waveforms able to efficiently operate in the 90–200 GHz spectrum. The researches rely on three complementary works: the definition of relevant communications scenarios (spectrum usage, application, environment, etc); the development of realistic models for the physical layer (propagation channel and RF equipments); and the elaboration of a single-carrier modulation compliant with the propagation channel properties, and allowing improvement on the spectral and energy efficiency. The motivation for this work, and the preliminary results on the waveform definition, are exposed in the present paper. Index Terms—Tbit/s, beyond-5G, above-90GHz, single-carrier. I. INTRODUCTION The activities of research and industrialization concerning the fifth generation (5G) of wireless communication systems are well-under way. Several solutions are proposed for standardization starting with 5G-NR (New Radio) [1]. There are three main objectives driving the development of 5G: the support to extreme wireless broadband services for applications such as the virtual and augmented realities, the 3D 4K video, cloud services, etc.; the connectivity for massive Internet of Thing (IoT) applications as: smart cities and factories, wireless health care; and the support of mission-critical services such as for autonomous vehicle, or security, with strong requirements on latency, guaranteed throughput, etc. All these target applications have highly different needs, but make 5G required to offer: throughputs in the order of Gbps with sub-millisecond latency along with 1000x capacity increase, and 100x connected devices per cell compared to nowadays existing mobile networks. Dense small-cell deployments , centralized RAN (Radio Access Network), advanced MIMO schemes and new millimeter-Wave (mmW) bands are key enablers to achieve the expected increase in spectral efficiency and capacity [2]. Frequency bands 26 or 28 GHz and 39 or 42 GHz will be likely selected for early 5G deployments. Alongside these 5G initiatives, the scientific community has also launched many investigations on the beyond 5G
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25th International Conference on Telecommunications (ICT'2018), Jun 2018, Saint-Malo, France. 2018, 〈10.1109/ict.2018.8464918〉
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Jean-Baptiste Doré, Yoann Corre, Simon Bicais, Jacques Palicot, Emmanuel Faussurier, et al.. Above-90GHz Spectrum and Single-Carrier Waveform as Enablers for Efficient Tbit/s Wireless Communications. 25th International Conference on Telecommunications (ICT'2018), Jun 2018, Saint-Malo, France. 2018, 〈10.1109/ict.2018.8464918〉. 〈hal-01778708〉

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