ThC2- Backhaul and SDR Design
Thursday, 20 June 2019, 14:00-15:30, Room 2
Session chair: Sylvie Mayrargue (CEA-LETI, France)
Technology for D-band/G-band Ultra Capacity Layer
Claudio Paoloni (Lancaster University, United Kingdom (Great Britain)); Antonio Ramirez (Fibernova Systems, Spain); François Magne (WHEN-AB & SARL, France); Marc Marilier (OMMIC, France); Rosa Letizia (Lancaster University, United Kingdom (Great Britain)); Ernesto Limiti (University of Rome Tor Vergata, Italy); Sebastian Boppel (Ferdinand-Braun-Institut, Germany); Borja Vidal (Universidad Politecnica de Valencia, Spain); Quang Trung Le (HF Systems Engineering GmbH & Co. KG, Germany); Ralp Zimmerman (HF System Engineering, Germany); Viktor Krozer (Goethe University of Frankfurt am Main, Germany)
The outstanding potentiality of the spectrum above 100 GHz for the backhaul of dense small cell architectures at level of tens of Gb/s needs substantial technology advancement. The short wavelength affects the dimensions of the components posing fabrication challenges. In addition, the decrease of transmission power at the increase of the frequency is a design constraint for the proper link budget calculation. The Horizon 2020 project ULTRAWAVE is progressing in the enabling of the first ultracapacity layer at Gigabit per second class by creating a mesh network of area sector at D-band (141 -148.5 GHz) with fronthaul at G-band ( 275 – 305 GHz) with a minimum number of fiber access points. The paper will describe the system specification of the ultracapacity layer and the millimeter wave technology in development.
D-Band Transport Solution to 5G and Beyond 5G Cellular Networks
Mario G L Frecassetti (NOKIA, Italy); Juan F Sevillano and David del Río (CEIT and TECNUN, Spain); Andrea Mazzanti (University of Pavia, Italy); Vladimir Ermolov (VTT Technical Research Centre of Finland)
The mobile data traffic increase and the future connection of billion of Internet of Things (IoT) devices require operators to reshape the existing transport network architecture. Today, more than 50 % of Base-stations (BTS) are backhauled via radio. Radio technology can continue to play this vital role in future transport networks if it is able to evolve to cope with the new capacity level and latency requirements supporting the new 5G services. In this paper, a possible answer to this demand is provided, proposing a radio solution working in D-Band (130-170 GHz) and enabling a reconfigurable meshed network that can support the backhaul needs of future 5G and beyond networks.
Simple Molecular Absorption Loss Model for 200-450 Gigahertz Frequency Band
Joonas Kokkoniemi, Janne Lehtomäki and Markku Juntti (University of Oulu, Finland)
This paper derives a simplified polynomial molecular absorption loss model for 200-450 GHz band. This band has a high potential for near future short range, high data rate applications due to large spectral resources and reasonable path loss. The frequencies around 300 GHz are among the first ones where the molecular absorption loss becomes a significant factor. This loss increases exponentially with the distance and is not a major issue at short distances (few meters), but entirely blocks signals over large distances. Modeling of the molecular absorption loss is relatively straightforward, but requires large numbers of parameters from spectroscopic databases. This paper derives a simplified polynomial absorption loss model for the major absorption lines. This extends and gives more accurate absorption loss values in comparison to the existing ITU-R absorption loss models. The simplified polynomial expressions by ITU-R are mostly limited to about 350 GHz frequency, although being rather accurate up to about 400 GHz. This paper gives a simpler and more accurate absorption loss model to those bands. A part of the considered band, 275-450 GHz band, is subject to World Radiocommunication Conference 2019 (WRC-19) for allocation and operational characterization for the future communication applications.
RGB Demultiplexer Based on Multicore Polymer Optical Fiber
Dror Malka (Holon Institute of Technology & MostlyTek, Israel); Moshe Ran (MostlyTek, Israel); Rami Dadabayev (Holon Institute of Technology, Israel)
Wavelength division multiplexing (WDM) is a good solution for increasing data bitrate communication of multicore polymer optical fiber (MC-POF) based visible light communication (VLC) system. However, this solution requires adding more optical components to the system which can limit its performance. In order to solve this issue, we propose a new design for an RGB demultiplexer based on polycarbonate (PC) MC-POF structure. The new structure is based on replacing several air-holes areas with PC layers over the fiber length which enables controlling the light propagation direction between the pc layers. The positions of the PC layers and the key geometrical parameters of the MC-POF were optimized and analyzed utilizing the beam propagation method (BPM). Results show that an RGB wavelength splitter can be obtained over a light propagation of 20 mm with an excellent crosstalk of -19.436 to -26.474 dB, low losses of 0.901 to 1.246 dB and a large bandwidth of 5.6 to 11.3 nm.
Spatially Combined Wideband Interleaved Transmitter
Prasidh Ramabadran (National University of Ireland, Maynooth & SFI CONNECT, Ireland); Pavel Afanasyev (National University of Ireland, Maynooth, Ireland); Sara Hesami (Maynooth University, Ireland); Darragh McCarthy (National University of Ireland, Maynooth, Ireland); Ronan Farrell (Maynooth University, Ireland); Bill O’Brien (Nonlinear Systems Limited, Ireland); John Dooley (National University of Ireland Maynooth, Ireland)
In this paper, we propose a novel wideband wireless transmission scheme with spatially combined frequency interleaved transmitters of narrower bandwidths. The proposed technique enables development of seamless scalable bandwidth transmitters for next generation wireless and satellite communications with potential to reuse legacy hardware. The scheme is experimentally validated at Ka Band with instantaneous modulation bandwidths up to 400 MHz achieving transmission bit rates up to 2.039 Gbps.
Software-Defined Radio Prototype for Fast-Convolution-Based Filtered OFDM in 5G NR
Selahattin Gökceli (Tampere University, Finland); Toni A Levanen, Juha Yli-Kaakinen and Matias Turunen (Tampere University of Technology, Finland); Markus Allén and Taneli Riihonen (Tampere University, Finland); Arto Palin (Nokia Research Center, Finland); Markku K. Renfors and Mikko Valkama (Tampere University of Technology, Finland)
In this work, we provide first-in-class measurement results for fast-convolution-based filtered orthogonal frequency-division multiplexing (FC-F-OFDM) processing implemented on a universal software radio peripheral (USRP) software-defined radio (SDR). The fast-convolution-based filter bank is a highly efficient and flexible scheme allowing to achieve high spectral utilization in all channel bandwidths. As per the transmitter output radio-frequency (RF) spectrum emissions, we show that FC-F-OFDM allows to increase spectrum utilization compared to the fifth generation new radio (5G NR) Release-15 requirements. Furthermore, considering the out-of-band emission masks and adjacent-channel-leakage-ratio requirements, FC-F-OFDM provides a larger interference margin than well-known windowed overlap-and-add OFDM processing.