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Ground topography retrieval on forested areas based on polarimetric SAR interferometry

REA Auditado

The work shown in this paper analyzes the topographic phase retrieval process on forested areas by means of Polarimetric
Interferometric SAR (PolInSAR) data. On the basis of the Random Volume over Ground scattering model, an alternative
implementation for the retrieval of the topographic phase, avoiding the bias introduced by the volumetric scattering components is presented. An evaluation based on simulated data is presented, where preliminary results show the capacity to
retrieve the topographic phase, unambiguously and without the effect of the volume contribution.

Tema: general: 

• General›Colecciones y Series (General)

Protocols and resource allocation for the two-way relay channel with half-duplex terminals

REA Auditado

The two-way relay channel (TWRC) describes the communication between two terminals sharing a common relay. In this work we compare different protocols for the TWRC with
a half-duplex relay (forwarding and protocol I) and transmission schemes (Network Coding Relaying with random binning and XOR precoding), when the relay works in decode-and-forward and without channel state information at the transmitters.

Tema: general: 

• General›Colecciones y Series (General)

Adaptive bitrate and resource allocation for relay-assisted ARQ transmissions

REA Auditado

Automatic repeat request (ARQ) protocols deal
with the situations where the selected data rate is not supported by the current channel realization. The inappropriate selection is
motivated by the limited channel state information at the transmitter (CSIT). This work looks into how the ARQ protocols are applied to the half-duplex relay-assisted transmission with decode-and-forward relays by exploiting the ACK feedback channel of the terminals. Two implementations are tackled: 1) only the source or 2) source and relay manage the retransmissions under the pure-ARQ protocol.

Tema: general: 

• General›Colecciones y Series (General)

Analytical resource optimization for DF relay-assisted transmission under HARQ

REA Auditado

Under limited channel state information at the transmitter the communication suffers from the outage events produced by a data rate selection not supported by the current
channel realization. Automatic repeat request (ARQ) protocols are a useful tool to deal with those outage events in delay-tolerant services. This work looks into how Automatic Repeat Request(ARQ) protocols are applied to the half-duplex relay-assisted
transmission with a decode-and-forward (DF) relay.

Tema: general: 

• General›Colecciones y Series (General)

Joint temporal-spatial reference beamforming: EIG beamforming

REA Auditado

Traditional methods for beamforming can be grouped in two families, the time reference beamformer and the spatial reference beamforming. Nevertheless, the increasing demand on receivers for location systems and high bandwidth over frequency selective fading able to properly manage multipath and co-channel interference motivates the need for versatile processing able to cope with both problems.

Tema: general: 

• General›Colecciones y Series (General)

Differential SAR interferometry with orbital, airborne and ground-based sensors

REA Auditado

• Introduction to Differential Interferometry
• Orbital Sensors: ERS, ENVISAT, RADARSAT2, TerraSAR-X.
• Airborne Sensors: DLR’s E-SAR
• Ground-Based Sensors: UPC’s GB-SAR
• Conclusions Peer Reviewed Postprint (published version)

Tema: general: 

• General›Colecciones y Series (General)

Resources optimization in GMPLS-based optical multilayer networks

REA Auditado

Tema: general: 

• General›Colecciones y Series (General)

Wavelength conversion towards Rayleigh backscattering tolerant PONs via four-wave mixing in SOA-based ONUs

REA Auditado

Wavelength shifting in PONs with downstream signal remodulation is presented, allowing upstream transmission over trees with 25km feeder and 1:32 split with penalties <2dB,
originally Rayleigh backscattering limited. Side-mode suppression is analyzed for hybrid PONs. Peer Reviewed Postprint (published version)

Tema: general: 

• General›Colecciones y Series (General)