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Validation platform implementation description – D5.2

REA Auditado

Deliverable D5.2 del projecte OneFIT

Tema: general: 

• Ingeniería y Ciencias Aplicadas›Ingeniería›Telecomunicaciones

Information definition and signalling flows – D3.2

REA Auditado

Deliverable D3.2 del projecte OneFIT

Tema: general: 

• Ingeniería y Ciencias Aplicadas›Ingeniería›Telecomunicaciones

On the need for dynamic downlink intercell interference coordination for realistic long term evolution deployments

REA Auditado

Intercell interference is the main issue limiting the capacity of modern orthogonal frequency-division multiple access
based cellular networks. Recently, extensive research work has been carried out in this field, and intercell interference
coordination techniques have been recognized as key enablers of current (and future) cellular technologies. In this article,
(i) a comprehensive survey of the most representative contributions is provided together with (ii) a generic methodology
to measure their actual merit.

Tema: general: 

• Ingeniería y Ciencias Aplicadas›Ingeniería›Telecomunicaciones

Reduced cluster search ML decoding for QO-STBC M-QAM MIMO systems

REA Auditado

Since the maximum likelihood (ML) decoding for quasi-orthogonal
space-time block codes (QO-STBC) with inner and outer codes multipleinputmultiple-
output (MIMO) antenna systems results too complex when the
modulation order index and the number of receive antennas increases, an
efficient reduced complexity ML-based decoding scheme is proposed in this
contribution, aiming to reach promising QO-STBC coded MIMO system
throughput × complexity trade-off.

Tema: general: 

• Ingeniería y Ciencias Aplicadas›Ingeniería›Telecomunicaciones

Identification of potential subsidence related to pumping in the Almería basin (SE Spain)

REA Auditado

Ground subsidence of detrital deposits in the Almer´ıa basin (SE Spain) was studied using the remote sensing technique of
Differential Interferometry SAR (DInSAR). This basin is one of the most arid in Europe, receiving an average rainfall of
250 mm per year. Over the last 60 years the region has experienced an enormous agricultural and urban expansion, whose water
demand has been largely supplied from groundwater, leading to the current situation of overexploitation of water resources.
This paper outlines the likely relationship between groundwater abstraction and subsidence.

Tema: general: 

• Ingeniería y Ciencias Aplicadas›Ingeniería›Telecomunicaciones

Look-up table implementation of a slow envelope dependent digital predistorter for envelope tracking power amplifiers

REA Auditado

This letter presents a dynamic slow envelope dependent digital predistorter (SED-DPD) capable of compensating for the nonlinear distortion and memory effects that arise in envelope tracking (ET) power amplifiers (PAs) when using a slow version of the signal's envelope to dynamically supply the PA drain voltage. Moreover, a new DPD architecture based on the combination of several basic predistortion cells (BPCs) is presented to allow the FPGA implementation of the proposed SED-DPD. Finally, results showing the necessity and linearization performance of the proposed dynamic SED-DPD are provided.

Tema: general: 

• Ingeniería y Ciencias Aplicadas›Ingeniería›Telecomunicaciones

Stable vortex-soliton tori with multiple nested phase singularities in dissipative media

REA Auditado

We show the existence of stable two- and three-dimensional vortex solitons carrying multiple, spatially separated, single-charge topological dislocations nested in a common vortex-ring core. Such nonlinear states are supported by elliptical gain landscapes in focusing nonlinear media with two-photon absorption. The separation between the phase dislocations is dictated mostly by the geometry of the gain landscape, and it only slightly changes upon variation of the gain or absorption strength.

Tema: general: 

• Ingeniería y Ciencias Aplicadas›Ingeniería›Telecomunicaciones

Vegetation water content estimation using GNSS measurements

REA Auditado

Global Navigation Satellite Systems (GNSS) opportunity signals reflected at or near the Earth's surface have already shown their potential to perform retrievals of a number of geophysical parameters. Radio occultations using GNSS signals are also used for atmospheric sensing. This letter presents a GNSS technique to retrieve vegetation water content (VWC). This technique measures the received powers of the GPS signals in open sky and under the vegetation layer. From these two powers, the attenuation due to the vegetation is computed, which is related to the VWC.

Tema: general: 

• Ingeniería y Ciencias Aplicadas›Ingeniería›Telecomunicaciones

Compact ultrafast semiconductor disk laser: targeting GFP based nonlinear applications in living organisms

REA Auditado

We present a portable ultrafast Semiconductor Disk Laser (SDL) (or vertical extended cavity surface emitting laser—VECSELs), to be used for nonlinear microscopy. The SDL is modelocked using a quantum-dot semiconductor saturable absorber mirror (SESAM), delivering an average output power of 287 mW, with 1.5 ps pulses at 500 MHz and a central wavelength of 965 nm. Specifically, despite the fact of having long pulses and high repetition rates, we demonstrate the potential of this laser for Two-Photon Excited Fluorescence (TPEF) imaging of in vivo Caenorhabditis elegans (C.

Tema: general: 

• Ingeniería y Ciencias Aplicadas›Ingeniería›Telecomunicaciones

Measurement and correction of in vivo sample aberrations employing a nonlinear guide-star in two-photon excited fluorescence microscopy

REA Auditado

We demonstrate that sample induced aberrations can be measured in a nonlinear microscope. This uses the fact that two-photon excited fluorescence naturally produces a localized point source inside the sample: the nonlinear guide-star (NL-GS). The wavefront emitted from the NL-GS can then be recorded using a Shack-Hartmann sensor. Compensation of the recorded sample aberrations is performed by the deformable mirror in a single-step.

Tema: general: 

• Ingeniería y Ciencias Aplicadas›Ingeniería›Telecomunicaciones