SleepTalker: A ULV 802.15.4a IR-UWB Transmitter SoC in 28-nm FDSOI Achieving 14 pJ/b at 27 Mb/s With Channel Selection Based on Adaptive FBB and Digitally Programmable Pulse Shaping

  • Bol D.
  • Cathelin A.
  • De Streel G.
  • Durant F.
  • Frenkel C.
  • Gurne T.
  • Stas F.

Achieving wireless communications at 5-30 Mb/s in energy-harvesting Internet-of-Things (IoT) applications requires energy efficiencies better than 100 pJ/b. Impulse-radio ultrawideband (UWB) communications offer an efficient way to achieve high data rate at ultralow power for short-range links. We propose a digital UWB transmitter (TX) system-on-chip (SoC) designed for ultralow voltage ...

Reduced Switching Connectivity for Large Scale Antenna Selection

  • Garcia Rodriguez A.
  • Masouros C.
  • Rulikowski P.

In this paper, we explore reduced-connectivity radio frequency (RF) switching networks for reducing the analog hardware complexity and switching power losses in antenna selection (AS) systems. In particular, we analyze different hardware architectures for implementing the RF switching matrices required in AS designs with a reduced number of RF chains. ...

Advanced C+L-Band Transoceanic Transmission Systems Based on Probabilistically-Shaped PDM-64QAM

  • Brindel P.
  • Buchali F.
  • Carbo Meseguer A.
  • Charlet G.
  • Fernandez I.
  • Ghazisaeidi A.
  • Hu Q.
  • Renaudier J.
  • Rios-Muller R.
  • Schmalen L.
  • Tran P.

We review the most recent, advanced concepts and methods employed in the cutting-edge spectrally-efficient coherent fiber-optic transoceanic transmission systems, such as probabilistic shaping, adaptive digital nonlinear compensation, rate-adaptive spatially-coupled low density parity check codes, and dual-band C+L-band transmission. Building upon all these concepts and methods, we demonstrate transmission of 179 ...

Multicarrier Approaches for high-baudrate Optical-Fiber Transmission Systems with a Single Coherent Receiver

  • Ludo V. Compernolle
  • Marc Wuilpart
  • Patrice Me´Gret
  • Qinwei He
  • Thai Le S.
  • Tu T. Nguyen

In this paper, we show the remarkable timing error (TE) and residual chromatic dispersion (CD) tolerance improvements of the filter bank multicarrier (FBMC) over orthogonal frequency division multiplexing (OFDM) for high-baudrate spectral slicing transmitter and a single coherent receiver transmissions. For a 512 Gb=s 16 quadrature amplitude modulated (16QAM) spectrum ...

Topology-Aware Prediction of Virtual Network Function Resource Requirements

  • Boutaba R.
  • Davy A.
  • Davy S.
  • Hasija S.
  • Jennings B.
  • Mijumbi R.

Network functions virtualization (NFV) continues to gain attention as a paradigm shift in the way telecommunications services are deployed and managed. By separating network function from traditional middleboxes, NFV is expected to lead to reduced capital expenditure and operating expenditure, and to more agile services. However, one of the main ...

Cell-Free Massive MIMO versus Small Cells

  • Ashikhmin A.
  • Larsson E.
  • Marzetta T.
  • Ngo H.
  • Yang H.

A Cell-Free Massive MIMO (multiple-input multiple-output) system comprises a very large number of distributed access points (APs)which simultaneously serve a much smaller number of users over the same time/frequency resources based on directly measured channel characteristics. The APs and users have only one antenna each. The APs acquire channel state ...

Performance of Cell-Free Massive MIMO Systems with MMSE and LSFD Receivers

  • Ashikhmin A.
  • Marzetta T.
  • Nayebi E.
  • Rao B.

Cell-Free Massive MIMO comprises a large number of distributed single-antenna access points (APs) serving a much smaller number of users. There is no partitioning into cells and each user is served by all APs. In this paper, the uplink performance of cell-free systems with minimum mean squared error (MMSE) and ...

Convolutional Lattices

  • C. Kourtellaris
  • J. J. Boutros
  • Jardel F.
  • N. Di Pietro

Real convolutional lattices over the ring of integers Z are considered in this paper. We study the stability of convolutional lattices under sphere decoding. A new stable family of time-alternating convolutional lattices is proposed. The structure, the parameters, and a performance example are shown for time-alternating convolutional lattices. These lattices ...

Resource Allocation for Coded Distributed Computing

  • Avestimehr S.
  • Liz S.
  • Maddahali M.
  • Yu Q.

A data center has an abundance of processing power (e.g., it hosts tens of thousands of servers). To execute a distributed computing job, it is natural to have multiple servers working on different parts of the job in parallel to reduce the computation time. On the other hand, in most ...

Performance characteristics of 5G mmWave wireless-to-the-home

  • Ghosh A.
  • Thomas T.
  • Visotsky E.
  • Vook F.

With the standardization of 5G cellular systems now underway, new frequency bands are being considered for 5G deployments, namely, cmWave bands (3–30 GHz) and mmWave bands (30–100 GHz). An early use case for 5G in these non-traditional cellular bands is to provide fixed access wireless services to residential users in ...

Collaborative Filtering-Based Recommendation of Online Social Voting

  • Ding H.
  • Li Y.
  • Liang C.
  • Liu Y.
  • Wang H.
  • Yang X.
  • Zhang J.
  • Zhao M.

Social voting is an emerging new feature in online social networks. It poses unique challenges and opportunities for recommendation. In this paper, we develop a set of matrix-factorization (MF) and nearest-neighbor (NN)-based recommender systems (RSs) that explore user social network and group affiliation information for social voting recommendation. Through experiments ...

All-fiber 6-mode multiplexers based on fiber mode selective couplers

  • Chang S.
  • Chen H.
  • Fontaine N.
  • Kim K.
  • Lee J.
  • Park K.
  • Ryf R.

All-fiber 6-mode multiplexer composed of two consecutive LP11-mode selective couplers (MSC), two LP21-MSCs and an LP02-MSC is characterized by wavelength-swept interferometer. A pair of the multiplexers has minimum mode dependent loss of 4 dB and high mode group selectivity of over 15 dB. Mode division multiplexed transmission enabled by the ...

Group-Blind Detection for Uplink of Massive MIMO Systems

  • Ferrante G.
  • Geraci G.
  • Quek T.
  • Win M.

When paired with traditional channel estimation and detection, massive MIMO is severely affected by pilot contamination. While sticking to the traditional structure of the training phase, where orthogonal pilot sequences are reused in different cells, we propose a new group-blind detector that takes into account the presence of pilot contamination. ...

Field Trial of a 1 Tbit/s Super-Channel Network Using Probabilistically Shaped Constellations

  • Buchali F.
  • Idler W.
  • Lach E.
  • Schmalen L.

We successfully tested the suitability of probabilistically shaped constellations in a German nationwide fibre ring of the R&D field test network of Deutsche Telekom. In this ring eight German cities can be reached by add/drop nodes implemented by passive optical add/drop multiplexers, offering 12 bands of 400 GHz widths at ...

Edge Coloring and Stopping Sets Analysis in Product Codes With MDS Components

  • Boutros J.
  • Jardel F.

We consider non-binary product codes with MDS components and their iterative row-column algebraic decoding on the erasure channel. Both independent and block erasures are considered in this paper. A compact graph representation is introduced on which we define double-diversity edge colorings via the rootcheck concept. An upper bound of the ...

Blind symbol timing synchronization scheme for real-time industrial wireless control network using high-speed preambleless OFDM systems over multipath fading channels

  • Ahn C.
  • Tian Y.
  • Wang W.

An accurate estimation of symbol timing is crucial for orthogonal frequency division multiplexing (OFDM) demodulation, since synchronization errors might destroy the orthogonality among all subcarriers and have greater impact on the system performance than single carrier systems. The symbol timing offset (STO) that leads to inter-symbol interference (ISI) and inter-channel ...

Noisy Hegselmann-Krause Systems: Phase Transition and the 2R-Conjecture

  • Chazelle B.
  • E W.
  • Li Q.
  • Wang C.

The classic Hegselmann-Krause (HK) model for opinion dynamics consists of a set of agents on the real line, each one instructed to move, at every time step, to the mass center of the agents within a fixed distance R. In this work, we investigate the effects of noise in the ...

Bandwidth Variable Transmitter for Software Defined Networks

  • Bigo S.
  • Dupas A.
  • Layec P.
  • Verchere D.

We review the architecture of Bandwidth Variable Transmitter designed for Software Defined Networks. We focus on 10-100Gbit/s elastic coherent transmission performances and high speed switching time enabling SDN controlled zero packet loss operation.

QoS-Aware Protection in Flexgrid Optical Networks

  • Bigo S.
  • Bisson A.
  • Dupas A.
  • Layec P.

We propose a protection scenario for flexgrid networks whereby premium traffic survives cuts with just-enough bandwidth. We demonstrate a proof-of-concept with a novel two-wavelength Baudrate-switchable optical transmitter, which reconfigures in <2.8ms. We compute typical spectral usage boosted by 80%.

Extra penalty when fitting the filtering bandwidth of successive traversed WSS's to a lower channel symbol rate

  • Faure B.
  • Lavigne B.
  • Zami T.

We investigate with a real time Baud rate agile transponder, the OSNR penalty on a signal traversing several WSSs the filtering bandwidths of which are set proportionally to the symbol rate for optimal spectral utilization