Browsing by Author "Vázquez Grau, Gregorio"
Now showing items 1-20 of 135
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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, ... -
A statistical reference criterion for adaptive filtering
(Institute of Electrical and Electronics Engineers (IEEE), 1996)
Conference report
Open AccessA cost function for adaptive filtering is proposed, based on the statistical reference criterion. The purpose of this criterion is to enforce a given probability density function at the output of a system. The only ... -
A statistical reference criterion for adaptive filtering
(Institute of Electrical and Electronics Engineers (IEEE), 1996)
Conference report
Open AccessA cost function for adaptive filtering is proposed, based on the statistical reference criterion. The purpose of this criterion is to enforce a given probability density function at the output of a system. The only ... -
Adaptive blind equalization and demodulation without channel and signal parameter extraction
(1994)
Conference report
Open AccessThe problem of filtering a source of known statistics in noise and/or interference of unknown statistics is addressed in this paper. In a general framework, the optimum estimation (detection) of the desired signal requires ... -
Adaptive Filter Solution For Processing Lidar Returns: Optical Parameter Estimation
(OPTICAL SOC AMER, 1998-01-31)
Article
Open AccessJoint estimation of extinction and backscatter simulated profiles from elastic-backscatter lidar return signals is tackled by means of an extended Kalman filter (EKF). First, we introduced the issue from a theoretical point ... -
Adaptive filter solution for processing lidar returns: optical parameter estimation
(1998-10)
Article
Restricted access - publisher's policyJoint estimation of extinction and backscatter simulated profiles from elastic-backscatter lidar return signals is tackled by means of an extended Kalman filter (EKF). First, we introduced the issue from a theoretical point ... -
Adaptive spectrum estimation with linear constrains
(1988)
Conference report
Open AccessA general constrained adaptive metbod is developed to be applied to the spectral estimation problem. The method presented can be used in a wide range of situatious, this is, we can get different estimators wíth it. The ... -
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. -
Analizador de espectro digital de 2.048 muestras de tipo captura
(Fundación Universidad-Empresa, 1986)
Conference report
Open AccessEn muchas aplicaciones, tales como geofísica, análisis de voz, calibración de instrumentos, medidas acústicas, etc. es útil el procesado digital de señal. En el presente trabajo se presenta el diseño de un procesador ... -
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 -
Array geometry-invariant space-time opportunistic null-space communications
(Institute of Electrical and Electronics Engineers (IEEE), 2024)
Article
Open AccessThis work studies the impact of the array geometry on a space-time extension of a generalized class of null-space precoding format denoted as p -waveforms (Projection-Invariant waveforms), which exhibit subspace invariance ... -
Array-geometry invariant signaling for MISO feedforward opportunistic communications
(Institute of Electrical and Electronics Engineers (IEEE), 2020)
Conference report
Open AccessThe impact of antenna array geometry on scenario- aware invariant signaling is studied in the context of feedforward opportunistic communications. Invariance plays an elemental role to guarantee the detectability in ...
