The development of the ITU-R terrestrial clutter loss model

ITU-R has recently published a new Recommendation giving methods for the estimation of clutter loss at frequencies between 30 MHz and 100 GHz. This paper provides an overview of the methods. In particular, the derivation and form of the new clutter model for terrestrial paths is described in detail and ...

An Enhanced Selected Mapping Technique for Joint PAPR Reduction and Impulsive Noise Suppression in Multi-Carrier Powerline Communications Systems

  • Gacanin H.
  • O. Muta
  • T. Kageyama

In power line communication (PLC) systems using multi-carrier modulation such as orthogonal frequency division multiplexing (OFDM), reduction of peak-to-average power ratio (PAPR) of OFDM signal and mitigation of the influence of impulsive noise are challenging problems. To deal with these problems in PLC-OFDM systems, this paper proposes an enhanced selected ...

Achieving Ultra-Reliable Low-Latency Communications: Challenges and Envisioned System Enhancements

  • Li Zexian
  • Pedersen K.
  • Pocovi G.
  • Steiner J.

Ultra-reliable low-latency communications (URLLC) have the potential to enable a new range of applications and services: from wireless control and automation in industrial environments, to self-driving vehicles. The fifth generation (5G) wireless systems are faced by different challenges for supporting URLLC. Some of the challenges, particularly in downlink direction, are ...

Zero-Zero Mobility: Intra-Frequency Handovers with Zero Interruption and Zero Failures

  • Lobinger A.
  • Martikainen H.
  • Viering I.
  • Wegmann B.

Today's intra-frequency hard handovers in LTE suffer from interruption even if they are successful, and from a risk of failures. The next generation ?New Radio? will introduce more strict requirements which cannot be fulfilled with the traditional hard handover concept. Namely, a handover with 0ms interruption is mandated, and extreme ...

SDN-based Wi-Fi Direct Clustering for Cloud Access in Campus Networks

  • Hamidouche L.
  • Iskounen S.
  • Mathieu F.
  • Monnet S.
  • Nguyen T.

Mobile cloud is changing the way to enroll teaching activities in university campus. Lectures and lab sessions can be carried out directly from tablets in a class room by accessing a server in the cloud. In this paper, we address the problem of high density cloud access with wireless devices ...

Collaborative Energy and Information Transfer in Green Wireless Sensor Networks for Smart Cities

  • Gong Y.
  • Liu X.
  • Lu W.
  • Peng H.
  • Wu J.

Smart city is able to make the city source and infrastructure more efficiently utilized, which improves the quality of life for citizens. In this framework, wireless sensor networks (WSNs) play an important role to collect, process, and analyze the corresponding information. However, the massive deployment of WSNs consumes a significant ...

Coded Tandem Spreading Multiple Access for Massive Machine-Type Communications

  • Ai B.
  • Chen X.
  • Guan H.
  • Ma G.
  • Wang F.
  • Zhao Z.
  • Zhong Z.

Future IoT applications provoke the connectivity and reliability requirements of machine-type communications, which yield mMTC and URLLC, respectively. In mMTC, grant-free NOMA is adopted to serve massive machine-type devices with low signaling overhead. The challenge of grantfree NOMA for mMTC is the collision induced by non-orthogonal resource allocation. Various grantfree ...

Channel estimation and throughput evaluation for 5G wireless communication systems in various scenarios on high speed railways

  • He R.
  • Wang G.
  • Wang X.
  • Zhao Y.
  • Zhao Z.
  • Zou Y.

The fifth generation (5G) wireless communication is currently a hot research topic and wireless communication systems on high speed railways (HSR) are important applications of 5G technologies. Existing studies about 5G wireless systems on high speed railways (HSR) often utilize ideal channel parameters and are usually based on simple scenarios. ...

UL SRS Coordination in 5G Massive MIMO Systems

  • Baracca P.
  • Campanalonga L.
  • Galati Giordano L.
  • Garcia Rodriguez A.
  • Geraci G.
  • Lopez-Perez D.
  • Magarini M.

In massive multiple input multiple output (MIMO) systems operating in time division duplex (TDD), users connected to different base stations (BSs) transmit uplink (UL) pilot sequences to allow channel estimation for both UL and downlink (DL) directions. The ongoing standardization activity around the fifth generation (5G) of communication systems is ...

Scheduling in multi-wavelength ring-based optical networks-on-chip

Synchronous networks-on-chip (NoC) require tailored schedulers achieving low latency, high throughput, and fairness while avoiding packet collisions. Efficient schedulers exist for rearrangeable non-blocking NoC. However, NoCs fabricated in integrated photonics typically suffer a blocking behavior due to the limitations of the switching capabilities in the space and wavelength domains. This ...

Variable Rate Ultra-Reliable and Low-Latency Communication for Industrial Automation

  • Khosravirad S.
  • Viswanathan H.

Ultra-reliable low-latency communication (URLLC) is an increasingly important aspect of wireless communications in the 5th generation mobile networks (5G) era. Specifically, in the context of wireless mission-critical communication for factory automation where the most demanding reliability requirement of nine nines figure is considered for isochronous packet delivery in highly constrained ...

Variable-rate ultra-reliable and low-latency communication for industrial automation

Ultra-reliable and low-latency communications (URLLC) is an increasingly important aspect of wireless communications in the 5th generation mobile networks (5G) era, specifically in the context of wireless mission-critical communications for factory automation. This paper proposes a pilot-assisted variable rate URLLC scheme for the downlink (DL) of a factory automation network ...

Network Slicing & Softwarization: A Survey on Principles, Enabling Technologies & Solutions

Network slicing has been identified as the backbone of the rapidly evolving 5G technology. However, as its consolidation and standardization progress, there are no literatures that comprehensively discuss its key principles, enablers and research challenges. This paper elaborates network slicing from an endto- end perspective detailing its historical heritage, principal ...

Quater-Imaginary for Complex Arithmetic Circuits

  • Gomony M.
  • Sarkar S.

Arithmetic operations involving complex numbers are widely used in the signal processing functions of the physical layer of modern wireless and wireline communication systems, electronic instrumentation and control systems. With the ever increasing throughput requirements of the communication standards, the power consumption of the hardware realization is going beyond the ...

Non-linear precoding based hybrid space-ground beamforming for multi-beam satellite systems

  • Haardt M.
  • Song N.
  • Yang T.

Multi-beam mobile satellite systems have a great potential in providing broadband mobile services over a large area to achieve a high system throughput. On ground beamforming techniques are quite promising but require a large feeder link bandwidth to deliver all the feeds’ signals. There are two potential solutions to solve ...

Benefit of progressive deployment of regenerators along with traffic growth in WDM elastic networks

  • Morea A.
  • Pesic J.
  • Zami T.

We present a new strategy of regenerator placement along with traffic growth in the elastic WDM networks, by introducing additional regenerators on the already allocated connections only from when needed to accommodate extra demand of capacity

MIMO Equalization for High-Speed Communication Under Channel Variability

  • Dries Vande Ginste
  • Guenach M.
  • Jelle Bailleul
  • Lennert Jacobs
  • Marc M.
  • Paolo Manfredi

High-speed communication over mutually coupled channels can be severely affected by intersymbol interference (ISI) and crosstalk (XT). Multiple-input multiple-output (MIMO) equalization is known to mitigate both ISI and XT, but requires accurate channel information at the receiver (RX) and/or transmitter (TX) when the channel is stochastic. However, since adjusting the ...

Record-High 17.3-bit/s/Hz Spectral Efficiency Transmission over 50 km Using Probabilistically Shaped PDM 4096-QAM

  • Burrows E.
  • Chen X.
  • Cho J.
  • Olsson S.
  • Sethumadhavan C.
  • Winzer P.

We demonstrate transmission of a 10-subcarrier superchannel with a record-high intra-channel spectral efficiency of 17.3 bit/s/Hz over 50-km backward Raman amplified Corning Vascade EX2000 fiber using 3-GBd probabilistically shaped PDM 4096-QAM.

Scalable Mode sorter supporting 210 Hermite-Gaussian modes

  • Carpenter J.
  • Chen H.
  • Fontaine N.
  • Kim K.
  • Neilson D.
  • Ryf R.

We demonstrate a multi-plane light conversion device based on 7 planes which maps Hermite-Gaussian spatial modes with indices (m,n) onto a Cartesian grid (x,y) of diffraction limited spots for 210 spatial modes.

First Demonstration of an Ultra-Low-Latency Fronthaul Transport Over a Commercial TDM-PON Platform

  • Bidkar S.
  • Galaro J.
  • Pfeiffer T.

We demonstrate for the first time, feasibility of latency-critical mobile fronthaul (CPRI) transport over a 6 km PON infrastructure with co-existing residential broadband traffic using a standards-compliant commercial TDM-PON platform with a sub-200 µs round trip delay.