Browsing by Author "Villares Piera, Nemesio Javier"
Now showing items 1-20 of 66
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A non-data-aided SNR estimation technique for multilevel modulations exploiting signal cyclostationarity
(2010-11-01)
Article
Restricted access - publisher's policySignal-to-noise ratio (SNR) estimators of linear modulation schemes usually operate at one sample per symbol at the matched filter output. In this paper we propose a new method for estimating the SNR in the complex ... -
A nondata-aided SNR estimation technique for multilevel modulations exploiting signal cyclostationarity
(2010-11-01)
Article
Open AccessSignal-to-noise ratio (SNR) estimators of linear modulation schemes usually operate at one sample per symbol at the matched filter output. In this paper we propose a new method for estimating the SNR in the complex additive ... -
A rain and scintillation Ka-band channel simulator
(ESA, 2008)
Conference report
Open AccessThis paper describes the implementation of a Ka-band satellite channel simulator with emphasis on the synthesis of scintillation processes. The problem becomes one of generating a given probability density function, ... -
ADC Quantization Requirements
(2000-06)
Research report
Open AccessIn this document, we analyze the impact of the quantization at the input of the demultiplexer. The required number of bits of the Analog-to-Digital-Converter (ADC) is obtained, along with the corresponding quantization losses. -
ANTARES Project (Bridging Phase). Payload carrier synchronization : algorithms and simulations
(2011-11-23)
Research report
Restricted access - confidentiality agreementInforme final Bridging Phase. Versió 3.2 -
ANTARES Project (Phase B). Multiple acces scheme definition. Diverse trade-offs analysis for TDMA and CDMA
(2010-03-01)
Research report
Restricted access - confidentiality agreement -
ANTARES Project (Phase B). Multiple acces scheme definition. Spectral efficiency analysis of the MAC techniques considered for the Antares forward and return links
(2010-07-01)
Research report
Restricted access - confidentiality agreement -
ANTARES Project (Phase B). Multiple acces scheme definition. Successive interference cancellation for A-CDMA
(2010-05-01)
Research report
Restricted access - confidentiality agreement -
ANTARES Project (Phase B). Multiple access scheme definition. Impact of the aeronautical channel on the MAC techniques considered for the Antares forward and return links
(2010-03-01)
Research report
Restricted access - confidentiality agreement -
ANTARES Project (Phase B). Physical layer definition. Equalization detailed design
(2010-08-01)
Research report
Restricted access - confidentiality agreement -
ANTARES Project (Phase B). Physical layer definition. Payload carrier synchronization for the Antares TDMA return link
(2010-08-01)
Research report
Restricted access - confidentiality agreement -
Asymptotic and finite user PER analysis of successive interference cancellation in DS-CDMA
(2011-11)
Article
Open AccessAn expression is derived for the average Packet Error Rate (PER) of a Successive Interference Canceller (SIC) for DS-CDMA when the number of users asymptotically tends to infinity. The asymptotic probability density function ... -
Asymptotically optimum energy profile for successive interference cancellation in DS-CDMA under a power unbalance constraint
(2012-02)
Article
Open AccessA new Ordinary Differential Equation (ODE) governing the SNIR evolution of a Successive Interference Canceller (SIC) for DS-CDMA is derived when the number of users tends to infinity and all users share the same channel ... -
Binary graphs and message passing strategies for compressed sensing in the noiseless setting
(Institute of Electrical and Electronics Engineers (IEEE), 2012)
Conference report
Restricted access - publisher's policyWe propose a scheme for Compressed Sensing in the noiseless setting that reconstructs the original signal operating on a binary graph where the samples are obtained sequentially. The proposed scheme has an affordable ... -
Channel-aware energy allocation for throughput maximization in massive low-rate multiple access
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Conference report
Open AccessA multiple access (MA) optimization technique for massive low-rate direct-sequence spread spectrum communications is analyzed in this work. A dense network of users transmitting at the same rate to a common central node ... -
Cramer-Rao bounds for SNR estimation of oversampled linearly modulated signals
(2015-04-01)
Article
Open AccessMost signal-to-noise ratio (SNR) estimators use the receiver matched filter output sampled at the symbol rate, an approach which does not preserve all information in the analog waveform due to aliasing. Thus, it is relevant ... -
D1. Estudio de códigos PN para mejorar el ensanchado y la eficiencia espectral del sistema CDMA síncrono y asíncrono
(2008-11-10)
Research report
Restricted access - confidentiality agreement -
D2. Estructuras de detector multiusuario para CDMA síncrono y asíncrono
(2008-11-10)
Research report
Restricted access - confidentiality agreement -
D3. Sincronización robusta de frecuencia y fase para M-PSK sobre CDMA
(2008-11-10)
Research report
Restricted access - confidentiality agreement -
DA-GLRT burst detection and synchronization based on a chirp-like preamble
(2008)
Conference report
Restricted access - publisher's policyA specific preamble for the tasks of signal detection and synchronization in burst digital communications is presented. The preamble resembles a chirp signal used in RADAR applications. Its main benefit is that it allows ...
