Exploració per autor "Rodríguez Fonollosa, Javier"
Ara es mostren els items 50-69 de 96
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ML approaches to channel estimation for pilot-aided multi-rate DS/CDMA systems
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2002-03-31)
Article
Accés obertThis paper analyzes the asymptotic performance of maximum likelihood (ML) channel estimation algorithms in wideband code division multiple access (WCDMA) scenarios. We concentrate on systems with periodic spreading sequences ... -
MMSE Joint Detection in frequency-selective wireless communication channels for DS-CDMA systems
(Institute of Electrical and Electronics Engineers (IEEE), 2000)
Text en actes de congrés
Accés obertIn digital mobile communication systems, two important problems arise, namely multiple access interference (MAI) and intersymbol interference (ISI). An attractive solution is the use of code division multiple access (CDMA) ... -
Motion estimation using higher-order statistics
(1996-06)
Article
Accés obertThe objective of this paper is to introduce a fourth-order cost function of the displaced frame difference (DFD) capable of estimating motion even for small regions or blocks. Using higher than second-order statistics is ... -
Motion estimation using higher-order statistics
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1996-06-30)
Article
Accés obertThe objective of this paper is to introduce a fourth-order cost function of the displaced frame difference (DFD) capable of estimating motion even for small regions or blocks. Using higher than second-order statistics ... -
Multiqubit time-varying quantum channels for NISQ-era superconducting quantum processors
(American Physical Society, 2023-07)
Article
Accés obertTime-varying quantum channels (TVQCs) have been proposed as a model to include fluctuations of the relaxation (T1) and dephasing times (T2). In previous works, realizations of multiqubit TVQCs have been assumed to be equal ... -
Noncooperative and cooperative optimization of distributed energy generation and storage in the demand-side of the smart grid
(2013-05)
Article
Accés restringit per política de l'editorialThe electric energy distribution infrastructure is undergoing a startling technological evolution with the development of the smart grid concept, which allows more interaction between the supply-and the demand-side of the ... -
Noncooperative day-ahead bidding strategies for demand-side expected cost minimization with real-time adjustments: a GNEP approach
(2014-05-01)
Article
Accés restringit per política de l'editorialThe envisioned smart grid aims at improving the interaction between the supply-and the demand-side of the electricity network, creating unprecedented possibilities for optimizing the energy usage at different levels of the ... -
On a mutual information and a capacity bound gap of pilot-aided MIMO channels
(Institute of Electrical and Electronics Engineers (IEEE), 2011)
Text en actes de congrés
Accés restringit per política de l'editorialFor single-user MIMO channels with partial re ceiver CSI, we study the difference between a lower bound and two alternative upper bounds of the mutual information achieved with Gaussian codebooks. These differences are ... -
On a rate region approximation of MIMO channels under partial CSI
(2011)
Text en actes de congrés
Accés restringit per política de l'editorialWhen the receiver of a multiple-input multiple-output (MIMO) channel does not know the channel state, but only a linear estimate thereof, the rates achieved with (suboptimal) Gaussian codebooks become difficult to compute. ... -
On the diversity, multiplexing, and array gain tradeoff in MIMO channels
(IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
Text en actes de congrés
Accés obertFollowing the seminal work of Zheng and Tse on the diversity and multiplexing tradeoff (DMT) of MIMO channels, in this paper we introduce the array gain to further investigate the fundamental relation between transmission ... -
On the inclusion of channel's time dependence in a hidden Markov model for blind channel estimation
(BOB WERNER IEEE COMPUTER SOCIETY PRESS, 1996)
Text en actes de congrés
Accés obertWe introduce several modifications to the Baum&Welch (BW) formulas used to reestimate the parameters of a hidden Markov model (HMM). The estimated parameter is the channel impulse response (CIR) of a communication system ... -
On the inclusion of channel's time dependence in a hidden Markov model for blind channel estimation
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-05-31)
Article
Accés obertIn this paper, the theory of hidden Markov models (HMM) is applied to the problem of blind (without training sequences) channel estimation and data detection. Within a HMM framework, the Baum–Welch(BW) identification ... -
On the Totally Asynchronous Interference Channel with Single-User Receivers
(IEEE Press. Institute of Electrical and Electronics Engineers, 2009)
Text en actes de congrés
Accés obertThe performance characterization of decentralized wireless networks with uncoordinated sender-destination pairs motivates the study of the totally asynchronous interference channel with single-user receivers. Since this ... -
One-shot capacity bounds on the simultaneous transmission of classical and quantum information
(2019-10-07)
Article
Accés obertWe study the communication capabilities of a quan- tum channel under the most general channel model known as the one-shot model. Unlike classical channels that can only be used to transmit classical information (bits), a ... -
One-shot capacity bounds on the simultaneous transmission of public and private information over quantum channels
(Institute of Electrical and Electronics Engineers (IEEE), 2018)
Comunicació de congrés
Accés restringit per política de l'editorialWe aim to study the optimal rates of transmission of public and private classical information over a quantum channel in the most general channel model. To this end, we discuss a scenario in which a quantum channel is being ... -
Optimal array combiner and sequence detector in mobile radio channels
(1998)
Text en actes de congrés
Accés obertThe use of spatial diversity at the receiver front-end together with a sequence detector implies a joint design problem of the spatial combiner and the sequence detector impulse response. This joint design is usually faced ... -
Optimal pilot design and power control in correlated MISO links
(2012)
Text en actes de congrés
Accés restringit per política de l'editorialWe study the maximization of an achievable ergodic rate expression of a multiple-input single-output (MISO) channel where both ends are cognizant of the same erroneous estimate of the current fading state, yet they have ... -
Perfect and quasi-perfect codes for the Bosonic classical-quantum channel
(2023-01-18)
Article
Accés obertWe explore perfect and quasi-perfect codes for the Bosonic channel, where information is generated by a laser and conveyed in the form of coherent states. In particular, we consider the phase-modulation codebook for coherent ... -
Performance evaluation of interference cancellation techniques using adaptive antennas
(IEEE Vehicular Technology Society, 1998)
Text en actes de congrés
Accés obertTwo array-based algorithms, which jointly exploit or compensate for the spatial and temporal characteristics of the propagation channel, are proposed for intercell interference suppression in UMTS scenarios. The first one ... -
Performance evaluation of space-time block coding using a realistic mobile radio channel
(Institute of Electrical and Electronics Engineers (IEEE), 2000)
Text en actes de congrés
Accés obertThis paper presents a performance evaluation of space-time block coding (STBC) employing a realistic mobile radio channel model in macrocellular and urban environments. The bit error rate (BER) is computed by Monte-Carlo ...
