Investigating sub-THz PHY layer for future high-data-rate wireless backhaul

Spectrum above 90 GHz is a promising investigation domain to offer future wireless networks with performance beyond IMT 2020 such as 100+ Gbit/s data rate or sub-ms latency. In particular, the huge available bandwidth can serve the backhaul transport network in the perspective of future ultra-dense deployments, and massive front-haul data streams. This paper investigates the feasibility and characteristics of the in-street sub-THz mesh backhauling. The study relies on the highly realistic simulation of the physical layer performance, based on detailed geographical representation, ray-based propagation modelling, RF phase noise impairment, and a new modulation scheme robust to phase noise. The achievable throughput is studied, and it is shown that each link of a dense mesh backhaul network can reliably deliver several Gbit/s per 1-GHz carrier bandwidth. The multi-path diversity is assessed, as well as the impact of rainfall and phase noise level.

[1]  Laura Pometcu,et al.  Channel Model Characteristics in D-Band for NLOS Indoor Scenarios , 2019, 2019 13th European Conference on Antennas and Propagation (EuCAP).

[2]  Jean-Baptiste Dore,et al.  On the Optimum Demodulation in the Presence of Gaussian Phase Noise , 2018, 2018 25th International Conference on Telecommunications (ICT).

[3]  Thomas Kürner,et al.  Measurements in a Real Data Centre at 300 GHz and Recent Results , 2019, 2019 13th European Conference on Antennas and Propagation (EuCAP).

[4]  Jean-Baptiste Dore,et al.  Phase Noise Model Selection for Sub-THz Communications , 2019, 2019 IEEE Global Communications Conference (GLOBECOM).

[5]  Giulio Colavolpe,et al.  Constellation Optimization in the Presence of Strong Phase Noise , 2013, IEEE Transactions on Communications.

[6]  Matti Latva-aho,et al.  Key drivers and research challenges for 6G ubiquitous wireless intelligence , 2019 .

[7]  Mohammed Zahid Aslam,et al.  Analysis of 60-GHz In-street Backhaul Channel Measurements and LiDAR Ray-based Simulations , 2020, 2020 14th European Conference on Antennas and Propagation (EuCAP).

[8]  Simon Bicaïs,et al.  Design of Digital Communications for Strong Phase Noise Channels , 2020, IEEE Open Journal of Vehicular Technology.

[9]  Theodore S. Rappaport,et al.  Propagation Measurement System and Approach at 140 GHz-Moving to 6G and Above 100 GHz , 2018, 2018 IEEE Global Communications Conference (GLOBECOM).

[10]  Katsuyuki Haneda,et al.  Comparing Radio Propagation Channels Between 28 and 140 GHz Bands in a Shopping Mall , 2017, ArXiv.

[11]  Jacques Palicot,et al.  Sub-THz Spectrum as Enabler for 6G Wireless Communications up to 1 Tbit/s , 2019 .

[12]  Dan Kuylenstierna,et al.  Calculation of the Performance of Communication Systems From Measured Oscillator Phase Noise , 2013, IEEE Transactions on Circuits and Systems I: Regular Papers.

[13]  Mohammed Zahid Aslam,et al.  Ray-based Deterministic Channel Modelling for sub-THz Band , 2019, 2019 IEEE 30th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC Workshops).

[14]  PROPAGATION DATA AND PREDICTION METHODS FOR THE PLANNING OF INDOOR RADIOCOMMUNICATION SYSTEMS AND RADIO LOCAL AREA NETWORKS IN THE FREQUENCY RANGE 900 MHz TO 100 GHz , 1997 .