Probabilistic Eigenvalue Shaping for the Nonlinear Fourier Transform

  • Aref V.
  • Buchberger A.
  • Graell I Amat A.
  • Schmalen L.

We consider an NFT-based system embedding information into the imaginary part of the discrete spectrum. We show that by employing PES we can double the data rate. We validate our findings via Monte-Carlo and SSFM simulation and experimentally.

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 ...

Performance Analysis of Dense Small Cell Networks with Dynamic TDD

Small cell networks (SCNs) are envisioned to embrace dynamic time division duplexing (TDD) in order to tailor downlink (DL)/uplink (UL) subframe resources to quick variations and burstiness of DL/UL traffic. The study of dynamic TDD is particularly important because it serves as the predecessor of the full duplex transmission technology, ...

SAS-Assisted Coexistence-Aware Dynamic Channel Assignment in CBRS Band

The paradigm of shared spectrum allows secondary devices to opportunistically access spectrum bands underutilized by primary owners. Recently, the FCC has targeted the sharing of the 3.5 GHz (3550-3700 MHz) federal spectrum with commercial systems such as small cells. The rules require a Spectrum Access System (SAS) to accommodate three ...

iTCM: Towards Learning-Based Thermal Comfort Modeling via Pervasive Sensing for Smart Buildings

For decades, ASHRAE Standard 55 has been using the Fanger’s Predicted Mean Vote (PMV) model to evaluate the indoor thermal comfort satisfaction. However, this canonical model has drawbacks in both data inadequacy and lack of inputs from test subjects. In this research, we propose a learning-based solution for thermal comfort ...

Faster Heavy Hitters on Sliding Windows

Sliding window measurement is required by network functionalities such as load balancing, traffic engineering and intrusion detection. This work focuses on two fundamental problems -- identifying Heavy Hitters (HH) and Hierarchical Heavy Hitters (HHH) over sliding windows. We introduce two rigorously analyzed algorithms for the HH and HHH problems and ...

Integrated Hybrid Wavelength-tunable III-V/Silicon transmitter based on ring-assisted Mach-Zehnder interferometer modulator

  • Brenot R.
  • De Valicourt G.
  • Dong P.
  • Eggleston M.
  • Kim K.
  • Lee S.
  • Zhu C.

We demonstrate a wavelength-tunable hybrid III-V/Si transmitter based on a Vernier laser with more than 30 nm tuning range and two microring modulators nested in a Mach-Zehnder interferometer. This transmitter circuit has versatile operating modes. It can be used for OOK generation based on low drive voltage push-pull ring modulators ...

Optimization of code lines and time of access to information through object-relational mapping (ORM) using alternative tools of connection to database management systems (DBMS)

The present article presents a comparison between technologies used in the development of C# language systems for access to information in database management systems. The method used has been the classic for the input of information with some steps of data persistence to perform the modeling of information with the ...

Field experimental evaluation of higher rank MIMO in quad-directional UE antenna configuration for 5G radio access system

This paper presents field experiments on the downlink performance of a 5G radio access system employing higher rank MIMO in the quad-directional antenna configuration at UE side comparing the uni-directional antenna configuration in typical small cell environments. Each antenna branch of the quad-directional antenna directs for intervals of 90 degrees ...

5G RAN optimizations through radio shared data layer (RSDL)

This paper presents the challenges that are currently faced during X2/Xn handovers. Messages are exchanged between source and target eNBs over X2/Xn interface during handovers. This mechanism is quite inefficient due to messaging overheads, timers, retries and failures like message validation and resource unavailability. The paper proposes optimizations in the ...

An RNS-Based Forwarding Approach To Implement SFC

  • Hu Z.
  • Zhao M.

Because of the more and more diversified service, SFC needs to be dynamically and feasibly implemented. Thanks to NFV and SDN ideas, the new SFC architecture is defined to meet the requirements in the IETF. Based on the OpenFlow, the approach of the single flow table is used to implement ...

Virtual reality experience as a stress recovery solution in workplace

This paper reports a study exploring the possibilities of virtual reality (VR) and head mounted display as a stress recovery solution for workplace. Commercially available low-cost head mounted display (HMD) was used for presenting three different 360° videos of nature scenes, -sounds and calm music. Six experiment sessions were arranged ...

Low-Profile Miniaturized Coaxial Cavity Resonators and Filters

  • Bulja S.
  • Dmitry Kozlov
  • Doumanis E.

A new class of coaxial cavity filters with low-profile is proposed. The additional benefits of the technology include: volume reduction, high performance, and superior spurious free-response. The proposed resonator consists of a cavity enclosure and three metallic conductors; an outer hollow cylinder, an inner hollow cylinder protruding the cavity from ...

Typhoon: An SDN Enhanced Real-Time Big Data Streaming Framework

  • Chang H.
  • Cho J.
  • Lakshman T.
  • Mukherjee S.
  • Van Der Merwe J.

Current big data streaming frameworks focus mainly on the scalability of real-time stream data processing, and are not flexible, controllable, and programmable enough to accomodate dynamic streaming application needs. For example, current frameworks do not deal well with use cases like updating routing and computation logic, or enabling live debugging ...

Simple optoelectronic frequency-offset estimator for coherent optical OFDM

  • Corcoran B.
  • Jignesh J.
  • Lowery A.
  • Zhu C.

We propose a carrier frequency-offset estimator for optical OFDM systems using off-the-shelf optical components and simple digital processing as a replacement for the purely digital signal processing using the cyclostationarity property of optical OFDM signals with cyclic prefix. Simulations show the system accuracy of < 4% estimate error within the ...

Optimal Control of Storage Regeneration with Repair Codes

  • De Pellegrini F.
  • El-Azouzi R.
  • Hassani O.
  • Silva A.

High availability of containerized applications requires to perform robust storage of applications' state. Since basic replication techniques are extremely costly at scale, storage space requirements can be reduced by means of erasure and/or repairing codes. In this paper we address storage regeneration using repair codes, which is a robust distributed ...

Service-aware Network Slice Trading in a Shared Multi-tenant Infrastructure

  • Akgul O.
  • Capone A.
  • Malanchini I.
  • Suryaprakash V.

Maintaining service guarantees in a dynamic multi-tenant network, while ensuring an economically sustainable sharing platform, is a non-trivial problem. This paper, extending on our previous work, develops a dynamic slicing and trading framework that can satisfy a variety of service guarantees. This framework not only determines the size of the ...

Coverage and Capacity Impact of Mobility and Human Body Blocking at Millimeter Waves

  • Kaya A.
  • Viswanathan H.

We investigate the impact human body blocking on the performance of millimeter wave wireless systems in an urban hotspot scenario. The effects of human body blocking at higher frequency bands are expected to be more severe than at traditional cellular bands because of worse signal propagation through the human body. ...

System-Level Performance Evaluation for 5G mmWave Cellular Network

  • Gacanin H.
  • Jonathan Rodriguez
  • Kazi M. S. Huq
  • Shahid Mumtaz
  • Sherif A. Busari

Cellular networks with hyper-dense deployment of small cells have been identified as the performance-optimizing architecture for fifth-generation (5G) mobile systems. A thousandfold capacity increase is projected when such networks benefit from aggressive spatial multiplexing and huge bandwidth, realizable with massive antenna arrays and millimeter-wave (mmWave) spectrum, respectively. As a precursor ...

What is the Optimal Network Deployment for a Fixed Density of Antennas?

  • Guoqiang Mao
  • Lopez-Perez D.
  • Ming Ding
  • Xuefeng Yao
  • Zihuai Lin

In this paper, we answer a fundamental question: when the total number of antennas per square kilometer is fixed, what is the optimal network deployment? A denser network with a less number of antennas per base station (BS) or the opposite case. To evaluate network performance, we consider a practical ...