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Visualitza Congressos (Departament de Tecnologies de la Informació i les Comunicacions) per matèria "Comunicació sense fil, Sistemes de"
Ara mostrant els elements 1-18 de 18
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(Institute of Electrical and Electronics Engineers (IEEE), 2008)Multiple-input multiple-output (MIMO) techniques have become an essential part of broadband wireless communications systems. For example, the recently developed IEEE 802.16e specifications for broadband wireless access ...
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(Institute of Electrical and Electronics Engineers (IEEE), 2009)A systolic array to implement lattice-reduction-aided linear/ndetection is proposed for a MIMO receiver. The lattice reduction/nalgorithm and the ensuing linear detections are operated in the same array, which can be ...
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(National Institute of Information and Communications Technology (NICT), 2008)We examine a multiple-access communication system in which multiuser detection is performed without knowledge of the number of active interferers. Using a statistical-physics approach, we compute the single-user channel ...
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(Institute of Electrical and Electronics Engineers (IEEE), 2009)For single-user MIMO communication with uncoded and coded QAM signals, we propose bit and power loading schemes that rely only on channel distribution information at the transmitter. To that end, we develop the relationship ...
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(Institute of Electrical and Electronics Engineers (IEEE), 2008)This paper studies the fundamental operational limits of a class of Gaussian multicast channels with an interference setting. In particular, the paper considers two base stations multicasting separate messages to distinct ...
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(Institute of Electrical and Electronics Engineers (IEEE), 2009)ADSL is becoming the standard form of residential and small-business broadband Internet access due to, primarily, its low deployment cost. These ADSL residential lines are often deployed with 802.11 Access Points (AP) that ...
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(Institute of Electrical and Electronics Engineers (IEEE), 2010)The purpose of this paper is to examine (1) some of the models commonly used to represent fading,/nand (2) the information-theoretic metrics most commonly used to evaluate performance over those models. We raise the question ...
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(Institute of Electrical and Electronics Engineers (IEEE), 2008)We show how to build full-diversity product codes under both iterative encoding and decoding over non-ergodic channels, in presence of block erasure and block fading. The concept of a rootcheck or a root subcode is introduced ...
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(Institute of Electrical and Electronics Engineers (IEEE), 2008)A new graph-based construction of generalized low density codes (GLD-Tanner) with binary BCH constituents is described. The proposed family of GLD codes is optimal on block erasure channels and quasi-optimal on block fading ...
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(European Association for Signal Processing (EURASIP), 2008)This paper presents several algorithms for joint estimation of the target number and state in a time-varying scenario. Building on the results presented in [1], which considers estimation of the target number only, we ...
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(European Association for Signal Processing (EURASIP), 2008)In multiuser detection, the set of users active at any time may be unknown to the receiver. In these conditions, optimum reception consists of detecting simultaneously the set of active/nusers and their data, problem that ...
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(Institute of Electrical and Electronics Engineers (IEEE), 2010)This paper presents our investigation on iterative/ndecoding performances of some sparse-graph codes on block-fading Rayleigh channels. The considered code ensembles are standard LDPC codes and Root-LDPC codes, first ...
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(Institute of Electrical and Electronics Engineers (IEEE), 2010)The optimization of the pilot overhead in wireless fading channels is investigated, and the dependence of this overhead on various system parameters of interest (e.g., fading rate, signal-to-noise ratio) is quantified. The ...
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(Institute of Electrical and Electronics Engineers (IEEE), 2010)This paper derives approximations allowing the estimation of outage probability for standard irregular LDPC codes and full-diversity Root-LDPC codes used over nonergodic block-fading channels. Two separate approaches are ...
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(European Association for Signal Processing (EURASIP), 2008)Silver Code (SilC) was originally discovered in [1–4] for 2×2 multiple-input multiple-output (MIMO) transmission. It has non-vanishing minimum determinant 1/7, slightly lower than Golden code, but is fast-decodable, i.e., ...
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(Institute of Electrical and Electronics Engineers (IEEE), 2008)This paper aims at illustrating some applications of Finite Random Set (FRS) theory to the design and analysis of wireless communication receivers, and at pointing out similarities and differences between this scenario and ...
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(Institute of Electrical and Electronics Engineers (IEEE), 2008)Expressions relating spectral efficiency, power and Doppler spectrum are derived for low-power Rayleighfaded wireless channels with proper complex signaling. No/nside information on the state of the channel is assumed at ...
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(Institute of Electrical and Electronics Engineers (IEEE), 2009)The spectral efficiency achievable with joint processing of pilot and data symbol observations is compared with that achievable through the conventional (separate) approach of first estimating the channel on the basis of ...
Ara mostrant els elements 1-18 de 18
