Browsing by Subject "Multiplexing"
Now showing items 1-20 of 46
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A fully SDN enabled all-optical architecture for data centre virtualisation with time and space multiplexing
(Institute of Electrical and Electronics Engineers (IEEE), 2018-07-01)
Article
Open AccessVirtual Data Centre (VDC) solutions provide an environment that is able to quickly scale-up and where virtual machines and network resources can be quickly added on-demand through self-service procedures. VDC providers ... -
A resource management scheme for multi-user GFDM with adaptive modulation in frequency selective fading channels
(Universitat Politècnica de Catalunya, 2016-05-03)
Bachelor thesis
Open Access
Covenantee: Technische Universität DresdenThis final project focus on designing and evaluating a resource management scheme for a multi-user generalized frequency division multiplexing (GFDM) system, when a frequency selective fading channel and adaptive modulation ... -
Absorptive frequency selective limiter for multiplexers
(Universitat Politècnica de Catalunya, 2012-07-05)
Master thesis
Restricted access - author's decisionRF & Microwave Receivers are used to detect low level signals. Therefore require high gain and low noise sensitive circuits at the input. These circuits (most of all LNA) are often susceptible to damage if exposed to ... -
All-optical communication system based on orthogonal frequency-division multiplexing (OFDM) and optical time-division multiplexing (OTDM)
(Universitat Politècnica de Catalunya, 2014-05-13)
Master thesis (pre-Bologna period)
Open Access
Covenantee: Danmarks tekniske universitet[ANGLÈS] We propose and demonstrate a novel principle that combines optical orthogonal frequency-division multiplexing (O-OFDM) and optical time-division multiplexing (OTDM). The principle is based on generating and ... -
Autonomous and energy efficient lightpath operation based on digital subcarrier multiplexing
(2021-09)
Article
Open AccessThe massive deployment of 5G and beyond will require high capacity and low latency connectivity services, so network operators will have either to overprovision capacity in their transport networks or to upgrade the optical ... -
Chirp-based direct phase modulation of VCSELs managed by Neural Networks
(Universitat Politècnica de Catalunya, 2019-05-29)
Master thesis
Open AccessVCSEL's capacity of direct modulation and its low cost makes this device a feasible cost-effective transmitter for ultra-dense wavelength division multiplexing (uDWDM) metro-access networks using coherent detection. However, ... -
Cost-effective spatial super-channel allocation in Flex-Grid/MCF optical core networks
(2018-01-01)
Article
Open AccessSpace Division Multiplexing (SDM) is a key technology to cope with the bandwidth limitations of single mode fibers. Multi-Core Fibers (MCFs) are considered as a promising candidate technology to implement SDM, due to their ... -
Design and assessment of FM-MCFs-suited SDM-ROADMs with versatile spatial group configurations and unified QoT estimator
(Institute of Electrical and Electronics Engineers (IEEE), 2020-11-15)
Article
Open AccessIn this article, we focus on the design of different node architectures suitable for few-mode multi-core fibers (FMMCFs) based networks. Both dimensions, core and mode, open different possible ways to group spatial channels ... -
Design of a real-time multiplexed blood flow sensorial system
(Universitat Politècnica de Catalunya, 2018-01-18)
Master thesis
Restricted access - confidentiality agreement -
Dual-polarized feed for mmWave lens antennas
(Universitat Politècnica de Catalunya, 2020-05)
Master thesis
Open Access
Covenantee: Kungliga Tekniska högskolan / EricssonThe fact of being bulky and not very cost-efficient made lens antennas not to be taken much into account in the past. Nowadays, this kind of antennas has attracted more attention due to the increasing demand of higher ... -
Dynamic subcarrier allocation for multipoint-to-point optical connectivity
(Institute of Electrical and Electronics Engineers (IEEE), 2022)
Conference report
Open AccessA mathematical programming model is proposed to dynamically allocate subcarriers in the upstream direction of point-to-multipoint connections based on Digital Subcarrier Multiplexing. Numerical results show significant ... -
Dynamic traffic grooming in Joint Switching (JoS)-enabled flex-grid/SDM optical core networks
(Institute of Electrical and Electronics Engineers (IEEE), 2018)
Conference report
Open AccessWe propose and evaluate a dynamic traffic grooming strategy enhancing the performance of JoS-enabled Flex-Grid/SDM networks. Results disclose up to 120% and 44% additional carried network traffic vs. no grooming and existing ... -
Elastic Networks thematic network results I: Planning and control of Flex-Grid/SDM
(Institute of Electrical and Electronics Engineers (IEEE), 2018)
Conference report
Open AccessThis paper overviews the approach of the Elastic Networks research network to address different issues of planning and control of Flex-Grid/SDM optical networks. Firstly, we present the Net2Plan open-source planning tool ... -
Elastic systems
(Institute of Electrical and Electronics Engineers (IEEE), 2010)
Conference report
Open AccessElastic systems provide tolerance to the variations in computation and communication delays. The incorporation of elasticity opens new opportunities for optimization using new correct-by-construction transformations that ... -
Electrochemical multi-sensors obtained by applying an electric discharge treatment to 3D-printed poly(lactic acid)
(2022-09-30)
Article
Restricted access - publisher's policyElectrochemical sensors for real-time detection of several bioanalytes have been prepared by additive manufacturing, shaping non-conductive poly(lactic acid) (PLA) filaments, and applying a physical treatment to create ... -
Evaluating the energy efficiency of DWA algorithms in UDWDM-PONs
(2016)
Conference report
Restricted access - publisher's policyUltra-Dense Wavelength Division Multiplexing (UDWDM) has been proposed for the optical access Passive Optical Network (PON) in the COst-effective COhereNt Ultra-dense-WDM-PON for lambda-To-the-user access (COCONUT) ... -
Evaluation of Add/Drop flexibility requirements in future SDM-enabled ROADMs
(Institute of Electrical and Electronics Engineers (IEEE), 2020)
Conference report
Open AccessIn this paper, we evaluate five different architectures for implementing the Add/Drop module of future Spatial Division Multiplexing (SDM)-enabled Re-configurable Optical Add & Drop Multiplexers (ROADMs) with different ... -
Evaluation of core-continuity-constrained ROADMs for flex-grid/MCF optical networks
(Institute of Electrical and Electronics Engineers (IEEE), 2017-11-01)
Article
Open AccessTo effectively keep pace with the global IP traffic growth forecasted in the years to come, flex-grid over multi-core fiber (MCF) networks can bring superior spectrum utilization flexibility, as well as bandwidth scalability ... -
Experimental demonstration of long-distance space-division multiplexing transmission over few-mode and multi-core fibers
(Universitat Politècnica de Catalunya, 2013-02-13)
Master thesis (pre-Bologna period)
Open Access[ANGLÈS] After the extremely fast growth over last two decades, single-mode fibers capacity is reaching its recently revealed fundamental limit, imposed by a combination of Shannon's information theory and fiber nonlinearities. ... -
Flexible resource provisioning of polarization independent coherent PONs based on non-orthogonal multiple access and multiCAP modulation
(Institute of Electrical and Electronics Engineers (IEEE); Optical Society of America, 2021-07)
Article
Open AccessA combined non-orthogonal multiple access (NOMA) and multiband carrierless amplitude and phase modulation (multiCAP) scheme is proposed for flexible resource provisioning in coherent passive optical networks (PONs). While ...