Modulation over Nonlinear Fourier Spectrum: Continuous and Discrete Spectrum

Nonlinear Frequency Division Multiplexed (NFDM) systems are considered when data is modulated in both parts of the nonlinear Fourier spectrum: continuous spectrum and discrete spectrum. An efficient algorithm is introduced to generate a time-domain signal from a given nonlinear spectrum. The transmission of such NFDM symbols is experimentally demonstrated over ...

Modulation on Discrete Nonlinear Spectrum: Perturbation Sensitivity and Achievable Rates

Multi-soliton pulses are studied under small perturbations. By means of mutual information (MI), we show that the nonlinear spectrum becomes correlated when a 64-PSK modulated 2-eigenvalues soliton is perturbed by a small additive white Gaussian noise (AWGN). Transmission over two channels are considered: an AWGN channel (back-to-back scenario) and an ...

A Low-Cost Scalable 32-Element 28-GHz Phased Array Transceiver for 5G Communication Links Based on a 2x2 Beamformer Flip-Chip Unit Cell

This paper presents a scalable 28-GHz phased-array architecture suitable for fifth-generation (5G) communication links based on four-channel (2x2) transmit/receive (TRX) quad-core chips in SiGe BiCMOS with flip-chip packaging. Each channel of the quad-core beamformer chip has 4.6-dB noise figure (NF) in the receive (RX) mode and 10.5-dBm output 1-dB compression ...

25.4 Tb/s Transmission over Trans-Pacific Distances Using Truncated Probabilistically Shaped PDM-64QAM

Probabilistic constellation shaping (PCS), digital nonlinear compensation, and multi-rate spatially coupled low-density parity check codes are used to achieve 25.4 Tb/s transmission over 10,285km EDFA-only straight-line testbed at 6.1 bits/symbol/Hz. The gain provided by PCS over standard 64QAM is investigated over trans-Atlantic and trans-Pacific distances. Moreover, the potential benefits of ...

A Multiscale Sparse Array of Spatially-Spread Electromagnetic-Vector-Sensors for Direction Finding and Polarization Estimation

A multiscale sparse array, which is composed of spatially-spread electromagnetic-vectorsensors (SS-EMVSs), is proposed to estimate the direction-of-arrivals (DOA) and polarizations of multiple sources. The SS-EMVS is composed of three orthogonally oriented but spatially noncollocated dipoles to measure the electric field and three orthogonally oriented but spatially noncollocated loops to measure ...

Compact High Isolation Base-Station Duplexer Using Triple-Mode Ceramic Cavities

  • Abbosh A.
  • Hendry D.

A microwave duplexer with high isolation is presented. The device is based on triple mode filters that are built using silver plated ceramic cuboids. To create a six-pole, six-transmission zero filter in the DCS-1800 band, which is utilized in mobile communications, two cuboids are cascaded. To shift spurious harmonics, low ...

A Unified Array Geometry Composed of Multiple Identical Subarrays With Hole-Free Difference Coarrays for Underdetermined DOA Estimation

In this paper, we propose a unified array geometry, dubbed generalized nested subarray (GNSA), for the underdetermined direction-of-arrival estimation. The GNSA is composed of multiple, identical subarrays, which can be a minimum redundancy array (MRA), a (super) nested array, a uniform linear array (ULA), or any other linear arrays with ...

MIMO Time-domain Equalization for High-Speed Continuous Transmission Under Channel Variability

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 ...

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 end-to-end perspective detailing its historical heritage, principal concepts, ...

A Fast and Low-Loss Electromagnetically Tunable Optical Filter

Fast and simple optical filtering is a prerequisite for low-cost passive optical networking using multiple wavelengths to scale to higher capacity. We demonstrate a simple electromagnetically tuned optical filter capable of tuning across more than 700 GHz of optical spectrum in under 1 ms with low optical loss. We show ...

A Latency and Reliability Guaranteed Resource Allocation Scheme for LTE V2V Communication Systems

By leveraging the direct device-to-device (D2D) interaction, LTE Vehicle-to-Vehicle (V2V) communication becomes a promising solution to meet the stringent requirements of vehicular communication. In this paper, we propose to jointly optimize radio resource, power allocation, and modulation/coding schemes of the V2V communications, in order to guarantee the latency and reliability ...

Towards Massive Connectivity Support for Scalable mMTC Communications in 5G networks

  • Bockelmann C.
  • De Carvalho E.
  • Demestichas P.
  • Gregoratti D.
  • Ji Y.
  • Kosmatos E.
  • Navarro M.
  • Popovski Petar
  • Pratas N.
  • Raceala-Motoc M.
  • Saur S.
  • Schellmann M.
  • Stefanovic C.
  • Vivier G.
  • Wang Q.
  • Wunder G.

The fifth generation of cellular communication systems is foreseen to enable a multitude of new applications and use cases with very different requirements. A new 5G multiservice air interface needs to enhance broadband performance as well as provide new levels of reliability, latency and supported number of users. In this ...

Partial CSI Acquisition for Size-Constrained Massive MIMO Systems with User Mobility

  • Garcia-Rodriguez A.
  • Masouros C.
  • Qian J.

We propose a low-complexity approach for the downlink of physically-constrained massive multiple-input multiple-output (MIMO) systems with user mobility. We examine a channel state information (CSI) acquisition strategy that exploits both the spatial and temporal correlation among the channels of adjacent base station antennas. The proposed strategy solely collects CSI for ...

On assuring survivability of network operator's services in evolving network environment

At the awakening of the 5G network, efforts of operators and vendors are being put in achieving understandable reliability of services in evolutionary network. The increasing users’ requirements with regard to the received service jointly to the evolving networking environment have introduced many challenges to service reliability. If the network ...

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.

Performance Analysis of Dense Small Cell Networks with Dynamic TDD

  • Ding M.
  • Ding T.
  • Lin Z.
  • Lopez-Perez D.
  • Mao G.
  • Zomaya A.

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

  • Buddhikot M.
  • Roy S.
  • Ying X.

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

  • Guan K.
  • Hu W.
  • Jin G.
  • Tseng K.
  • Wen Y.

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 ...