Novel Lattice Reduction Algorithms: Precoder reduction and vector perturbation tradeoffs

  • Guenach M.

In this letter we present a novel iterative lattice reduction algorithm in precoded multiple input multiple output (MIMO) transmission. A unified framework is developed for this purpose, to reduce the precoder maximum row norm by iteratively minimizing the weighted sum of the precoder rownorms. We show that at each iteration ...

Multilevel Continuous Polarization Modulation with High Spectral Efficiency in the Depolarization Channels

  • Li R.
  • Liu F.
  • Wang B.
  • Wang X.

Facing the challenges of spectrum shortage and complex depolarization effects in wireless communication, a multilevel continuous polarization modulation (MCPoM) scheme is investigated to achieve high spectral efficiency and improve the symbol error rate performance in the practical depolarization channels. The principle of the MCPoM modulation is stated in details on ...

Measured Uplink Interference Caused by Aerial Vehicles in LTE Cellular Networks

  • Amorim R.
  • Biro D.
  • Kovacs I.
  • Mogensen P.
  • Nguyen H.
  • Sorensen M.
  • Sorensen T.
  • Wigard J.

Aerial users, such as unmanned aerial vehicles (UAVs), experience different radio propagation conditions than users on the ground. This is a concern regarding the integration of such users in the cellular networks in the near future. This paper investigates the impact of uplink transmissions from an aerial user equipment. Full ...

Multi-Flow Transmitter with Full Format and Rate Flexibility for Next Generation Networks

  • A. Vannucci
  • Boitier F.
  • C. Tsokos
  • Ch. Kouloumentas
  • D. Felipe
  • Dupuy J.
  • H. Avramopoulos
  • Jenneve P.
  • Jorge F.
  • Konczykowska A.
  • M. Spyropoulou
  • M. Tienforti
  • Mardoyan H.
  • N. Keil
  • P. Groumas
  • T. K. Johansen
  • V.Katopodis

We extend our proof-of-concept demonstration of a novel multi-flow transmitter for next generation optical metro networks. The multi-flow concept is based on the combination of spectrum and polarization sliceability, and its implementation on the combination of a polymer photonic integration platform with high-speed IQ modulators. In this work, we replace ...

Server Placement and Selection for Edge Computing in the ePC

  • Abe Y.
  • Hadzic I.
  • Woithe H.

Mobile Edge Computing (MEC) has received much attention from the research community in recent years. A significant part of the published work has studied the telecom-centric MEC architecture, which assumes that the computing resource is located at the edge of the mobile access network (e.g., the Evolved Packet Core or ...

14.5Tb/s Transmission over OM2 Multimode Fiber with Wavelength and Mode Group Multiplexing and Direct Detection

  • Benyahya K.
  • Charlet G.
  • Ghazisaeidi A.
  • Renaudier J.
  • Simonneau C.

We demonstrate 14.5Tb/s bidirectional transmission over 2.2km of OM2 fiber using selective excitation of 4 mode groups, WDM multiplexing and direct detection. 40 wavelengths per mode group are used, each wavelength is modulated with discrete multitone (DMT) scheme with 512 subcarriers. A 88Gs/s digital to analog converter (DAC) is used ...

Interference Reduction in Multi-Cell Massive MIMO Systems with Large-Scale Fading Precoding

  • Ashikhmin A.
  • Li L.
  • Marzetta T.

A wireless massive MIMO system entails a large number (tens or hundreds) of base station antennas serving a much smaller number of users, with large gains in spectral-efficiency and energy-efficiency compared with conventional MIMO technology. Until recently it was believed that in multi-cellular massive MIMO system, even in the asymptotic ...

A 64-Element 28-GHz Phased-Array Transceiver With 52-dBm EIRP and 8-12-Gb/s 5G Link at 300 Meters Without Any Calibration

  • Kibaroglu K.
  • Phelps T.
  • Rebeiz G.
  • Sayginer M.

This paper presents a 64-element 28-GHz phased-array transceiver for 5G communications based on 2x2 transmit/receive (TRX) beamformer chips. Sixteen of the 2x2 TRX chips are assembled on a 12-layer printed circuit board (PCB) together with a Wilkinson combiner/divider network and 28-32-GHz stacked-patch antennas. The 64-element array results in 1.1 dB ...

A Tutorial on Lossy Forwarding Cooperative Relaying

  • Cheng M.
  • He J.
  • He X.
  • Juntti M.
  • Matsumoto T.
  • Qian S.
  • Tervo V.
  • Zhou X.

Lossy decode-and-forward (DF) relaying, also referred to as lossy forwarding (LF), can significantly enhance the transmission reliability and expand the communication coverage at the cost of a small increase in computational effort compared to its DF counterpart. Furthermore, it can further simplify the operations at the relay nodes by removing ...

Dynamic Network Function Instance Scaling Based on Traffic Forecasting and VNF Placement in Operator Data Centers

  • Chen D.
  • Tang H.
  • Zhou D.

Traffic in operator networks is time varying. Conventional network functions implemented by black-boxes should satisfy the peak traffic requirement, and hence result in low resource utilization. Thanks to the emergence of Virtual Network Function (VNF), which is realized by running networking software on Virtual Machines (VMs), the operator can dynamically ...

SDN-based Multi-Protocol Edge Switching for IoT Service Automation

  • Chang H.
  • Lakshman T.
  • Mukherjee S.
  • Uddin M.

This paper proposes Muppet, an edge-based multiprotocol architecture for large scale IoT deployment and service automation. The crux of Muppet is a P4-based switch that inserts itself in between communicating IoT devices that can use different protocols. The switches are networked over IP to support wide area deployment, and managed ...

Licensing Options for Virtual Network Functions in Telecommunications Cloud Environment

  • Hilt A.
  • Jaro G.

In the paper we present the main licensing options for telecommunications Network Elements. We have special focus on Core Network Elements deployed in cloud environment, such as Mobile Switching Center Server and Telecommunication Application Server. The flexibility and the efficiency of the remote licensing option is shown with some recent ...

Automated optical networks with monitoring and machine learning

  • Boitier F.
  • Layec P.

We review monitoring techniques for coherent optical networks. We leverage the collected information with machine learning and show how optical networks can benefit from such techniques. We review how the optical network could be automated with learning techniques based on different use cases and associated architectures.

Price-Based Resource Allocation in Massive MIMO H-CRANs with Limited Fronthaul Capacity

  • Gacanin H.
  • Osamu Muta
  • Wanming Hao

In this paper, we study the frequency and power allocation problem in remote radio head cluster (RRHC)-based millimeter wave (mmWave) massive MIMO heterogeneous cloud radio access networks (H-CRANs) with limited fronthaul capacity. The coordinated multipoint (CoMP) transmission is applied in each RRHC for cancelling the intra-cluster interference. To avoid the ...

Recent Developments in Modal Analysis of Elliptical Waveguides

  • Agrawal G.
  • Antikainen. A
  • Essiambre R.

We present an overview on a recently developed novel mathematical method to determine the transverse modes of elliptical waveguides. The method is based on a perturbation expansion and avoids the numerical issues of the traditional Mathieu function treatment without compromising generality or versatility.

6thMode-Group Multiplexer for Intra-Mode Transmission Over 50-μm GI-Multimode Fiber

  • Alvarado-Zacarias J.
  • Amezcua Correa R.
  • Amezcua-Correa A.
  • Antonio-Lopez J.
  • Bigot M.
  • Bolle C.
  • Burrows E.
  • Capuzzo M.
  • Carpenter J.
  • Chen H.
  • Fontaine N.
  • Kim K.
  • Kopf R.
  • Li J.
  • Neilson D.
  • Ryf R.
  • Safar H.
  • Sillard P.
  • Tate A.
  • Wittek S.